# Monitoring IPv6

This section explains how to set an IPv6 statistics baseline and use the show commands to view your IPv6 configuration, monitor IPv6 interfaces and statistics, and view IPv6 neighbors. Many of these show commands also contain Neighbor Discovery information.

## System Event Logs

To troubleshoot and monitor IPv6, use the following system event logs:

- ipv6General—IPv6 general information
- ipv6Interface—IPv6 interface events
- ipv6ProfileMgr—IPv6 profile manager events
- ipv6RouteTable—IPv6 routing table events
- ipv6Traffic—IPv6 frame transmit and receive events

For more information about using event logs, see the JunosE System Event Logging Reference Guide.

## Establishing a Baseline

IPv6 statistics are stored in system counters. The only way to reset the system counters is to reboot the system. You can, however, establish a baseline for IPv6 statistics by setting a group of reference counters to zero (0).

baseline ipv6

- Use to set a baseline for IPv6 statistics.
- The router implements the baseline by reading and storing the statistics at the time the baseline is set and then subtracting this baseline whenever baseline-relative statistics are retrieved.
- Use the udp keyword to set a baseline for UDP statistics
- Use the delta keyword with IPv6 show commands to specify that baselined statistics are to be shown.
- Example
  host1#baseline ipv6
- There is no no version
- See baseline ipv6

baseline ipv6 interface

- Use to set a statistical baseline for a specified IPv6 interface.
- Example
  host1#baseline ipv6 interface atm 2/0.100
- There is no no version.
- See baseline ipv6 interface

baseline ipv6 local pool

- Use to set a baseline for IPv6 local address pool statistics used in DHCP prefix delegation.
- The router implements the baseline by reading and storing the statistics at the time the baseline is set and then subtracting this baseline whenever baseline-relative statistics are retrieved.
- Example
  host1#baseline ipv6 local pool
- There is no no version.
- See baseline ipv6 local pool.

baseline tcp

- Use to set a statistics baseline for all (both IPv4 and IPv6) TCP statistics or for only IPv4 or IPv6 statistics.
- The router implements the baseline by reading and storing the statistics at the time the baseline is set and then subtracting this baseline whenever baseline-relative statistics are retrieved.
- Use the ipv6 keyword to implement a baseline for only IPv6 statistics.
- Use the delta keyword with IP show commands to specify that baselined statistics are to be shown.
- Example 1
  host1#baseline tcp
- Example 2
  host1#baseline ipv6 tcp
- There is no no version.
- See baseline tcp

## IPv6 show Commands

You can monitor the following aspects of IPv6 using show ipv6 commands:

To Display | Command
--- | ---
General IPv6 information | show ipv6
IPv6 addresses | show ipv6 address
IPv6 forwarding table | show ipv6 forwarding table slot
IPv6 Interfaces | show ipv6 interface
IPv6 neighbors | show ipv6 neighbors
IPv6 profile information | show ipv6 profile
Active IPv6 protocol information | show ipv6 protocols
IPv6 route redistribution configuration | show ipv6 redistribute
IPv6 routes | show ipv6 route
IPv6 router advertisements received | show ipv6 routers
IPv6 static routes | show ipv6 static
IPv6 statistics/traffic | show ipv6 traffic
IPv6 UDP information | show ipv6 udp statistics
IPv6 license string | show license ipv6
IPv6 TCP information | show tcp statistics show ipv6 tcp statistics

You can use the output filtering feature of the show command to include or exclude lines of output based on a text string that you specify. See JunosE System Basics Configuration Guide, for details.

show ipv6

- Use to display general IPv6 information.
- Example

      host1#show ipv6
       Ipv6 Unicast Routing: Enabled
       Default hop limit: not specified
       Number of interfaces: 2
       Default interface source address/mask: fe80::90:1a00:210:fd0/128

- See show ipv6

show ipv6 address

show ipv6 interface

- Use to display detailed or summary information for a particular IPv6 address or interface or for all interfaces.
- The default for the show ipv6 interface command is all interface types and all interfaces.
- Use brief or detail keywords with the show ipv6 interface command to display different levels of information.
- Field descriptions
  - Description—Optional description for the interface or address specified
  - Network Protocols—Network protocols configured on this interface
  - Link local address—Local IPv6 address of this interface
  - Internet address—External address of this interface
  - IPv6 statistics Rcvd:
    - local destination—Frames with this router as their destination
    - hdr errors—Number of packets containing header errors
    - addr errors—Number of packets containing addressing errors
    - unkn proto—Number of packets received containing unknown protocols
    - discards—Number of discarded packets
  - IPv6 statistics Sent:
    - generated—Number of packets generated
    - no routes—Number of packets that could not be routed
    - discards—Number of packets that could not be routed that were discarded
  - ICMPv6 statistics Rcvd:
    - total—Total number of received packets
    - errors—Error packets received
    - destination unreach—Packets received with destination unreachable
    - admin unreach—Packets received because the destination was administratively unreachable (for example, the packet encountered a firewall filter)
    - parameter problem—Packets received with parameter errors
    - time exceeded—Packets received with time-to-live exceeded
    - pkt too big—Number of packet-too-big messages received that indicate a packet was too large to forward because of the allowed MTU size
    - redirects—Received packet redirects
    - echo requests—Echo request (ping) packets
    - echo replies—Echo replies received
    - rtr solicits—Number of received router solicitations
    - rtr advertisements—Number of received router advertisements
    - neighbor solicits—Number of received neighbor solicitations
    - neighbor advertisements—Number or received neighbor advertisements
    - Group membership (queries, responses, reductions)—Number of queries, responses, and reduction requests received from within a group to which the interface is assigned
  - ICMPv6 statistics Sent:
    - total—Total number of received packets
    - errors—Error packets received
    - destination unreach—Packets received with destination unreachable
    - admin unreach—Packets sent because the destination was administratively unreachable (for example, due to a firewall filter)
    - parameter problem—Packets received with parameter errors
    - time exceeded—Packets received with time-to-live exceeded
    - pkt too big—Number of packet-too-big messages sent because a received packet was too large to forward because of the allowed MTU size
    - redirects—Received packet redirects
    - echo requests—Echo request (ping) packets
    - echo replies—Echo replies received
    - rtr solicits—Number of sent router solicitations
    - rtr advertisements—Number of sent router advertisements
    - neighbor solicits—Number of sent neighbor solicitations
    - neighbor advertisements—Number of sent neighbor advertisements
    - Group membership (queries, responses, reductions)—Number of queries, responses, and reduction requests sent to a group of which the interface is assigned
  - Operational MTU—Value of the MTU
  - Administrative MTU—Value of the MTU if it has been administratively overridden using the configuration
  - Operational speed—Speed of the interface
  - Administrative speed—Value of the speed if it has been administratively overridden using the configuration
  - Creation type—Method by which the interface was created (static or dynamic)
  - HTTP Redirect Url—Url to which a subscriber’s initial web browser session is redirected
  - ND reachable time—Amount of time (in milliseconds) that the neighbor is expected to remain reachable
  - ND duplicate address detection attempts—Number of times that the router attempts to determine a duplicate address
  - ND neighbor solicitation retransmission interval—Interval in which the router retransmits neighbor solicitations
  - ND proxy—Indicates whether the router will reply to solicitations on behalf of a known neighbor
  - ND RA source link layer—Indicates whether the RA includes the link layer
  - ND RA interval—Interval (in seconds) of the neighbor discovery router advertisement
  - ND RA lifetime—Lifetime (in seconds) of the neighbor discovery router advertisement
  - ND RA managed flag—State of the neighbor discovery router advertisement managed flag
  - ND RA other config flag—State of the neighbor discovery router advertisement other config flag
  - ND RA advertising prefixes—Configured advertisement prefixes for neighbor discovery router advertisement
  - In Received Packets, Bytes—Total number of packets and bytes received on this interface
    - Unicast Packets, Bytes—Unicast packets and bytes received on the IPv6 interface; link-local received multicast packets (non-multicast-routed frames) are counted as unicast packets
    - Multicast Packets, Bytes—Multicast packets and bytes received on the IPv6 interface which are then multicast-routed are counted as multicast packets
  - In Total Dropped Packets, Bytes—Total number of inbound packets and bytes dropped on this interface
    - In Policed Packets—Packets that were received and dropped on the interface for any of the following reasons: exceeding the token bucket limit, exceeding the rate limit, a drop action in a policy, discarded MAC validation packets, a destination address lookup failure, or when the destination address is an IP interface that has a route configured to the null 0 interface.
    - In Invalid Source Address Packets—Packets received with invalid source address (for example, spoofed packets)
    - In Error Packets—Number of packets received with errors
    - In Discarded Packets—Packets received that were discarded for reasons other than rate limits, errors, and invalid source address
  - Out Forwarded Packets, Bytes—Total number of packets and bytes that were sent from this interface
    - Unicast Packets, Bytes—Unicast packets and bytes that were sent from this interface
    - Multicast Routed Packets, Bytes—Multicast packets and bytes that were sent from this interface
  - Out Total Dropped Packets—Total number of outbound packets and bytes dropped by this interface
    - Out Scheduler Dropped Packets, Bytes—Number of outbound packets and bytes dropped by the scheduler
    - Out Policed Packets, Bytes—Number of outbound packets and bytes dropped because of rate limits
    - Out Discarded Packets—Number of outbound packets that were discarded for reasons other than those dropped by the scheduler and those dropped because of rate limits
  - IPv6 policy—Type (input, output, local-input) and name of policy
    - rate-limit-profile—Name of profile
    - classifier-group entry—Entry index
    - Committed—Number of packets and bytes conforming to the committed access rate
    - Conformed—Number of packets and bytes that exceed the committed access rate but conform to the peak access rate
    - Exceeded—Number of packets and bytes exceeding the peak access rate
  - queue, traffic class, bound to ipv6—Queue and traffic class bound to the specified IPv6 interface
    - Queue length—Number of bytes in queue
    - Dropped committed packets, bytes—Total number of committed packets and bytes dropped by this interface
    - Dropped conformed packets, bytes—Total number of conformed packets and bytes dropped by this interface
    - Dropped exceeded packets, bytes—Total number of exceeded packets and bytes dropped by this interface
- Example 1

      host1#show ipv6 address 5:1:1::2
      FastEthernet9/1.5 line protocol VlanSub is up, ipv6 is up
        Description: IPv6 interface in Virtual Router Hop5
        Network Protocols: IPv6
        Link local address: fe80::90:1a00:740:31ce
        Internet address: 5:1:1::2/64
        Operational MTU 1500 Administrative MTU 0
        Operational speed 100000000 Administrative speed 0
        Creation type Static
        ND reachable time is 3600000 milliseconds
        ND duplicate address detection attempts is 100
        ND neighbor solicitation retransmission interval is 1000 milliseconds
        ND proxy is enabled
      ND RA source link layer is advertised
        ND RA interval is 200 seconds, lifetime is 1800 seconds
        ND RA managed flag is disabled, other config flag is disabled
        ND RA advertising prefixes configured on interface

        In Received Packets 12, Bytes 1260
          Unicast Packets 5, Bytes 588
          Multicast Packets 7, Bytes 672
        In Total Dropped Packets 0, Bytes 0
          In Policed Packets 0
          In Invalid Source Address Packets 0
          In Error Packets 0
          In Discarded Packets 0

        Out Forwarded Packets 21, Bytes 2352
          Unicast Packets 21, Bytes 2352
          Multicast Routed Packets 0, Bytes 0
        Out Total Dropped Packets 8, Bytes 0
          Out Scheduler Dropped Packets 0, Bytes 0
          Out Policed Packets 0
          Out Discarded Packets 8

        queue 0: traffic class best-effort, bound to ipv6 FastEthernet9/1.5
          Queue length 0 bytes
          Forwarded packets 4, bytes 680
          Dropped committed packets 0, bytes 0
          Dropped conformed packets 0, bytes 0
          Dropped exceeded packets 0, bytes 0

- Example 2

      host1#show ipv6 address detail 5:1:1::2
      FastEthernet9/1.5 line protocol VlanSub is up, ipv6 is up
        Description: IPv6 interface in Virtual Router Hop5
        Network Protocols: IPv6
        Link local address: fe80::90:1a00:740:31ce

        Internet address: 5:1:1::2/64
      IPv6 statistics:
        Rcvd:  0 local destination
               0 hdr errors, 0 addr errors
               0 unkn proto, 0 discards
        Sent:  0 generated, 0 no routes, 0 discards

      ICMPv6 statistics:
        Rcvd:  0 destination unreach, 0 admin unreach, 0 parameter problem
               0 time exceeded, 0 pkt too big, 0 echo requests
               3 echo replies
        Sent:  0 destination unreach, 0 admin unreach, 0 parameter problem
               0 time exceeded, 0 pkt too big, 5 echo requests
               0 echo replies

        Operational MTU 1500 Administrative MTU 0
        Operational speed 100000000 Administrative speed 0
        Creation type Static
        ND reachable time is 3600000 milliseconds
        ND duplicate address detection attempts is 100
        ND neighbor solicitation retransmission interval is 1000 milliseconds
        ND proxy is enabled
      ND RA source link layer is advertised
        ND RA interval is 200 seconds, lifetime is 1800 seconds
        ND RA managed flag is disabled, other config flag is disabled
        ND RA advertising prefixes configured on interface

        ICMPv6 statistics:
          Rcvd:  12 total, 0 errors
                 0 rtr solicits, 7 rtr advertisements
                 1 neighbor solicits, 1 neighbor advertisements
                 Group membership: 0 queries, 0 responses, 0 reductions
                 0 redirects
          Sent:  31 total, 0 errors
                 0 rtr solicits, 16 rtr advertisements
                 5 neighbor solicits, 5 neighbor advertisements
                 Group membership: 0 queries, 0 responses, 0 reductions
                 0 redirects

        In Received Packets 12, Bytes 1260
          Unicast Packets 5, Bytes 588
          Multicast Packets 7, Bytes 672
        In Total Dropped Packets 0, Bytes 0
          In Policed Packets 0
          In Invalid Source Address Packets 0
          In Error Packets 0
          In Discarded Packets 0

        Out Forwarded Packets 22, Bytes 2480
          Unicast Packets 22, Bytes 2480
          Multicast Routed Packets 0, Bytes 0
        Out Total Dropped Packets 8, Bytes 0
          Out Scheduler Dropped Packets 0, Bytes 0
          Out Policed Packets 0
          Out Discarded Packets 8

        queue 0: traffic class best-effort, bound to ipv6 FastEthernet9/1.5
          Queue length 0 bytes
          Forwarded packets 4, bytes 680
          Dropped committed packets 0, bytes 0
          Dropped conformed packets 0, bytes 0
          Dropped exceeded packets 0, bytes 0

- Example 3

      host1#show ipv6 interface
      null0 line protocol IpLoopback is up, ipv6 is up
        Network Protocols: IPv6
        Link local address: fe80::90:1a00:740:1d44
        Unnumbered Interface: Corresponding Numbered Interface not specified or
      removed
        Operational MTU 1500 Administrative MTU 0
        Operational speed 100000000 Administrative speed 0
        Creation type Static
        Neighbor Discovery is disabled

        In Received Packets 0, Bytes 0
          Unicast Packets 0, Bytes 0
          Multicast Packets 0, Bytes 0
        In Total Dropped Packets 0, Bytes 0
          In Policed Packets 0
          In Invalid Source Address Packets 0
          In Error Packets 0
          In Discarded Packets 0

        Out Forwarded Packets 0, Bytes 0
          Unicast Packets 0, Bytes 0
          Multicast Routed Packets 0, Bytes 0
        Out Total Dropped Packets 0, Bytes 0
          Out Scheduler Dropped Packets 0, Bytes 0
          Out Policed Packets 0
          Out Discarded Packets 0

      FastEthernet9/1.5 line protocol VlanSub is up, ipv6 is up
        Description: IPv6 interface in Virtual Router Hop5
        Network Protocols: IPv6
        Link local address: fe80::90:1a00:740:31ce
        Internet address: 5:1:1::2/64
        Operational MTU 1500 Administrative MTU 0
        Operational speed 100000000 Administrative speed 0
        Creation type Static
        ND reachable time is 3600000 milliseconds
        ND duplicate address detection attempts is 100
        ND neighbor solicitation retransmission interval is 1000 milliseconds
        ND proxy is enabled

        In Received Packets 13, Bytes 1356
          Unicast Packets 5, Bytes 588
          Multicast Packets 8, Bytes 768
        In Total Dropped Packets 0, Bytes 0
          In Policed Packets 0
          In Invalid Source Address Packets 0
          In Error Packets 0
          In Discarded Packets 0

        Out Forwarded Packets 22, Bytes 2480
          Unicast Packets 22, Bytes 2480
          Multicast Routed Packets 0, Bytes 0
        Out Total Dropped Packets 8, Bytes 0
          Out Scheduler Dropped Packets 0, Bytes 0
          Out Policed Packets 0
          Out Discarded Packets 8

        queue 0: traffic class best-effort, bound to ipv6 FastEthernet9/1.5
          Queue length 0 bytes
          Forwarded packets 4, bytes 680
          Dropped committed packets 0, bytes 0
          Dropped conformed packets 0, bytes 0
          Dropped exceeded packets 0, bytes 0

      FastEthernet9/0.6 line protocol VlanSub is up, ipv6 is up
        Description: IPv6 interface in Virtual Router Hop6
        Network Protocols: IPv6
        Link local address: fe80::90:1a00:740:31cd
        Internet address: 6:1:1::1/64
        Operational MTU 1500 Administrative MTU 0
        Operational speed 100000000 Administrative speed 0
        Creation type Static
        ND reachable time is 3600000 milliseconds
        ND duplicate address detection attempts is 100
        ND neighbor solicitation retransmission interval is 1000 milliseconds
        ND proxy is enabled
      ND RA source link layer is advertised
        ND RA interval is 200 seconds, lifetime is 1800 seconds
        ND RA managed flag is disabled, other config flag is disabled
        ND RA advertising prefixes configured on interface

        In Received Packets 0, Bytes 0
          Unicast Packets 0, Bytes 0
          Multicast Packets 0, Bytes 0
        In Total Dropped Packets 0, Bytes 0
          In Policed Packets 0
          In Invalid Source Address Packets 0
          In Error Packets 0
          In Discarded Packets 0

        Out Forwarded Packets 8, Bytes 768
          Unicast Packets 8, Bytes 768
          Multicast Routed Packets 0, Bytes 0
        Out Total Dropped Packets 5, Bytes 0
          Out Scheduler Dropped Packets 0, Bytes 0
          Out Policed Packets 0
          Out Discarded Packets 5

        queue 0: traffic class best-effort, bound to ipv6 FastEthernet9/0.6
          Queue length 0 bytes
          Forwarded packets 0, bytes 0
          Dropped committed packets 0, bytes 0
          Dropped conformed packets 0, bytes 0
          Dropped exceeded packets 0, bytes 0

      loopback5 line protocol IpLoopback is up, ipv6 is up
        Network Protocols: IPv6
        Link local address: fe80::90:1a00:740:1d44
        Internet address: 10:1:1:0:290:1aff:fe40:1d44/64 (eui-64)
        Operational MTU 1500 Administrative MTU 0
        Operational speed 100000000 Administrative speed 0
        Creation type Static
        Neighbor Discovery is disabled

        In Received Packets 0, Bytes 0
          Unicast Packets 0, Bytes 0
          Multicast Packets 0, Bytes 0
        In Total Dropped Packets 0, Bytes 0
          In Policed Packets 0
          In Invalid Source Address Packets 0
          In Error Packets 0
          In Discarded Packets 0

        Out Forwarded Packets 0, Bytes 0
          Unicast Packets 0, Bytes 0
          Multicast Routed Packets 0, Bytes 0
        Out Total Dropped Packets 0, Bytes 0
          Out Scheduler Dropped Packets 0, Bytes 0
          Out Policed Packets 0
          Out Discarded Packets 0

      IPv6 policy input ipv6InPol25
          rate-limit-profile Rlp2Mb classifier-group clgA entry 1
            Committed: 0 packets, 0 bytes
            Conformed: 0 packets, 0 bytes
            Exceeded:  0 packets, 0 bytes
          rate-limit-profile Rlp8Mb
            Committed: 0 packets, 0 bytes
            Conformed: 0 packets, 0 bytes
            Exceeded:  0 packets, 0 bytes
        IPv6 policy output ipv6PolOut2
          rate-limit-profile RlpOutA classifier-group clgB entry 1
            Committed: 0 packets, 0 bytes
            Conformed: 0 packets, 0 bytes
            Exceeded:  0 packets, 0 bytes
          rate-limit-profile RlpOutB
            Committed: 0 packets, 0 bytes
            Conformed: 0 packets, 0 bytes
            Exceeded:  0 packets, 0 bytes
        IPv6 policy local-input ipv6PolLocIn5
          rate-limit-profile Rlp1Mb classifier-group clgC entry 1
            Committed: 0 packets, 0 bytes
            Conformed: 0 packets, 0 bytes
            Exceeded:  0 packets, 0 bytes
          rate-limit-profile Rlp5Mb
            Committed: 0 packets, 0 bytes
            Conformed: 0 packets, 0 bytes
            Exceeded:  0 packets, 0 bytes
        queue 0: traffic class best-effort, bound to ipv6 FastEthernet9/0.6
          Queue length 0 bytes
          Forwarded packets 0, bytes 0
          Dropped committed packets 0, bytes 0
          Dropped conformed packets 0, bytes 0
          Dropped exceeded packets 0, bytes 0

- Example 4

      host1#show ipv6 interface FastEthernet 9/0.6
      FastEthernet9/0.6 line protocol VlanSub is up, ipv6 is up
        Description: IPv6 interface in Virtual Router Hop6
        Network Protocols: IPv6
        Link local address: fe80::90:1a00:740:31cd
        Internet address: 6:1:1::1/64
        Operational MTU 1500 Administrative MTU 0
        Operational speed 100000000 Administrative speed 0
        Creation type Static
        ND reachable time is 3600000 milliseconds
        ND duplicate address detection attempts is 100
        ND neighbor solicitation retransmission interval is 1000 milliseconds
        ND proxy is enabled
      ND RA source link layer is advertised
        ND RA interval is 200 seconds, lifetime is 1800 seconds
        ND RA managed flag is disabled, other config flag is disabled
        ND RA advertising prefixes configured on interface

        In Received Packets 0, Bytes 0
          Unicast Packets 0, Bytes 0
          Multicast Packets 0, Bytes 0
        In Total Dropped Packets 0, Bytes 0
          In Policed Packets 0
          In Invalid Source Address Packets 0
          In Error Packets 0
          In Discarded Packets 0

        Out Forwarded Packets 8, Bytes 768
          Unicast Packets 8, Bytes 768
          Multicast Routed Packets 0, Bytes 0
        Out Total Dropped Packets 5, Bytes 0
          Out Scheduler Dropped Packets 0, Bytes 0
          Out Policed Packets 0
          Out Discarded Packets 5

        queue 0: traffic class best-effort, bound to ipv6 FastEthernet9/0.6
          Queue length 0 bytes
          Forwarded packets 0, bytes 0
          Dropped committed packets 0, bytes 0
          Dropped conformed packets 0, bytes 0
          Dropped exceeded packets 0, bytes 0

      IPv6 policy input ipv6InPol25
          rate-limit-profile Rlp2Mb classifier-group clgA entry 1
            Committed: 0 packets, 0 bytes
            Conformed: 0 packets, 0 bytes
            Exceeded:  0 packets, 0 bytes
          rate-limit-profile Rlp8Mb
            Committed: 0 packets, 0 bytes
            Conformed: 0 packets, 0 bytes
            Exceeded:  0 packets, 0 bytes
        IPv6 policy output ipv6PolOut2
          rate-limit-profile RlpOutA classifier-group clgB entry 1
            Committed: 0 packets, 0 bytes
            Conformed: 0 packets, 0 bytes
            Exceeded:  0 packets, 0 bytes
          rate-limit-profile RlpOutB
            Committed: 0 packets, 0 bytes
            Conformed: 0 packets, 0 bytes
            Exceeded:  0 packets, 0 bytes
        IPv6 policy local-input ipv6PolLocIn5
          rate-limit-profile Rlp1Mb classifier-group clgC entry 1
            Committed: 0 packets, 0 bytes
            Conformed: 0 packets, 0 bytes
            Exceeded:  0 packets, 0 bytes
          rate-limit-profile Rlp5Mb
            Committed: 0 packets, 0 bytes
            Conformed: 0 packets, 0 bytes
            Exceeded:  0 packets, 0 bytes
        queue 0: traffic class best-effort, bound to ipv6 FastEthernet9/0.6
          Queue length 0 bytes
          Forwarded packets 0, bytes 0
          Dropped committed packets 0, bytes 0
          Dropped conformed packets 0, bytes 0
          Dropped exceeded packets 0, bytes 0
      Http Redirect Url: http://www.juniper.net

- Example 5

      host1#show ipv6 interface detail
      null0 line protocol IpLoopback is up, ipv6 is up
        Network Protocols: IPv6
        Link local address: fe80::90:1a00:740:1d44

        Unnumbered Interface: Corresponding Numbered Interface not specified or
      removed
      IPv6 statistics:
        Rcvd:  0 local destination
               0 hdr errors, 0 addr errors
               0 unkn proto, 0 discards
        Sent:  0 generated, 0 no routes, 0 discards

      ICMPv6 statistics:
        Rcvd:  0 destination unreach, 0 admin unreach, 0 parameter problem
               0 time exceeded, 0 pkt too big, 0 echo requests
               0 echo replies
        Sent:  0 destination unreach, 0 admin unreach, 0 parameter problem
               0 time exceeded, 0 pkt too big, 0 echo requests
               0 echo replies

        Operational MTU 1500 Administrative MTU 0
        Operational speed 100000000 Administrative speed 0
        Creation type Static
        Neighbor Discovery is disabled

        ICMPv6 statistics:
          Rcvd:  0 total, 0 errors
                 0 rtr solicits, 0 rtr advertisements
                 0 neighbor solicits, 0 neighbor advertisements
                 Group membership: 0 queries, 0 responses, 0 reductions
                 0 redirects
          Sent:  0 total, 0 errors
                 0 rtr solicits, 0 rtr advertisements
                 0 neighbor solicits, 0 neighbor advertisements
                 Group membership: 0 queries, 0 responses, 0 reductions
                 0 redirects

        In Received Packets 0, Bytes 0
          Unicast Packets 0, Bytes 0
          Multicast Packets 0, Bytes 0
        In Total Dropped Packets 0, Bytes 0
          In Policed Packets 0
          In Invalid Source Address Packets 0
          In Error Packets 0
          In Discarded Packets 0

        Out Forwarded Packets 0, Bytes 0
          Unicast Packets 0, Bytes 0
          Multicast Routed Packets 0, Bytes 0
        Out Total Dropped Packets 0, Bytes 0
          Out Scheduler Dropped Packets 0, Bytes 0
          Out Policed Packets 0
          Out Discarded Packets 0

      FastEthernet9/1.5 line protocol VlanSub is up, ipv6 is up
        Description: IPv6 interface in Virtual Router Hop5
        Network Protocols: IPv6
        Link local address: fe80::90:1a00:740:31ce

        Internet address: 5:1:1::2/64
      IPv6 statistics:
        Rcvd:  0 local destination
               0 hdr errors, 0 addr errors
               0 unkn proto, 0 discards
        Sent:  0 generated, 0 no routes, 0 discards

      ICMPv6 statistics:
        Rcvd:  0 destination unreach, 0 admin unreach, 0 parameter problem
               0 time exceeded, 0 pkt too big, 0 echo requests
               3 echo replies
        Sent:  0 destination unreach, 0 admin unreach, 0 parameter problem
               0 time exceeded, 0 pkt too big, 5 echo requests
               0 echo replies

        Operational MTU 1500 Administrative MTU 0
        Operational speed 100000000 Administrative speed 0
        Creation type Static
        ND reachable time is 3600000 milliseconds
        ND duplicate address detection attempts is 100
        ND neighbor solicitation retransmission interval is 1000 milliseconds
        ND proxy is enabled
      ND RA source link layer is advertised
        ND RA interval is 200 seconds, lifetime is 1800 seconds
        ND RA managed flag is disabled, other config flag is disabled
        ND RA advertising prefixes configured on interface

        ICMPv6 statistics:
          Rcvd:  13 total, 0 errors
                 0 rtr solicits, 8 rtr advertisements
                 1 neighbor solicits, 1 neighbor advertisements
                 Group membership: 0 queries, 0 responses, 0 reductions
                 0 redirects
          Sent:  31 total, 0 errors
                 0 rtr solicits, 16 rtr advertisements
                 5 neighbor solicits, 5 neighbor advertisements
                 Group membership: 0 queries, 0 responses, 0 reductions
                 0 redirects

        In Received Packets 13, Bytes 1356
          Unicast Packets 5, Bytes 588
          Multicast Packets 8, Bytes 768
        In Total Dropped Packets 0, Bytes 0
          In Policed Packets 0
          In Invalid Source Address Packets 0
          In Error Packets 0
          In Discarded Packets 0

        Out Forwarded Packets 22, Bytes 2480
          Unicast Packets 22, Bytes 2480
          Multicast Routed Packets 0, Bytes 0
        Out Total Dropped Packets 8, Bytes 0
          Out Scheduler Dropped Packets 0, Bytes 0
          Out Policed Packets 0
          Out Discarded Packets 8

        queue 0: traffic class best-effort, bound to ipv6 FastEthernet9/1.5
          Queue length 0 bytes
          Forwarded packets 4, bytes 680
          Dropped committed packets 0, bytes 0
          Dropped conformed packets 0, bytes 0
          Dropped exceeded packets 0, bytes 0

      FastEthernet9/0.6 line protocol VlanSub is up, ipv6 is up
        Description: IPv6 interface in Virtual Router Hop6
        Network Protocols: IPv6
        Link local address: fe80::90:1a00:740:31cd

        Internet address: 6:1:1::1/64
      IPv6 statistics:
        Rcvd:  0 local destination
               0 hdr errors, 0 addr errors
               0 unkn proto, 0 discards
        Sent:  0 generated, 0 no routes, 0 discards

      ICMPv6 statistics:
        Rcvd:  0 destination unreach, 0 admin unreach, 0 parameter problem
               0 time exceeded, 0 pkt too big, 0 echo requests
               0 echo replies
        Sent:  0 destination unreach, 0 admin unreach, 0 parameter problem
               0 time exceeded, 0 pkt too big, 0 echo requests
               0 echo replies

        Operational MTU 1500 Administrative MTU 0
        Operational speed 100000000 Administrative speed 0
        Creation type Static
        ND reachable time is 3600000 milliseconds
        ND duplicate address detection attempts is 100
        ND neighbor solicitation retransmission interval is 1000 milliseconds
        ND proxy is enabled
      ND RA source link layer is advertised
        ND RA interval is 200 seconds, lifetime is 1800 seconds
        ND RA managed flag is disabled, other config flag is disabled
        ND RA advertising prefixes configured on interface

        ICMPv6 statistics:
          Rcvd:  0 total, 0 errors
                 0 rtr solicits, 0 rtr advertisements
                 0 neighbor solicits, 0 neighbor advertisements
                 Group membership: 0 queries, 0 responses, 0 reductions
                 0 redirects
          Sent:  13 total, 0 errors
                 0 rtr solicits, 9 rtr advertisements
                 2 neighbor solicits, 2 neighbor advertisements
                 Group membership: 0 queries, 0 responses, 0 reductions
                 0 redirects

        In Received Packets 0, Bytes 0
          Unicast Packets 0, Bytes 0
          Multicast Packets 0, Bytes 0
        In Total Dropped Packets 0, Bytes 0
          In Policed Packets 0
          In Invalid Source Address Packets 0
          In Error Packets 0
          In Discarded Packets 0

        Out Forwarded Packets 8, Bytes 768
          Unicast Packets 8, Bytes 768
          Multicast Routed Packets 0, Bytes 0
        Out Total Dropped Packets 5, Bytes 0
          Out Scheduler Dropped Packets 0, Bytes 0
          Out Policed Packets 0
          Out Discarded Packets 5

        queue 0: traffic class best-effort, bound to ipv6 FastEthernet9/0.6
          Queue length 0 bytes
          Forwarded packets 0, bytes 0
          Dropped committed packets 0, bytes 0
          Dropped conformed packets 0, bytes 0
          Dropped exceeded packets 0, bytes 0

      loopback5 line protocol IpLoopback is up, ipv6 is up
        Network Protocols: IPv6
        Link local address: fe80::90:1a00:740:1d44

        Internet address: 10:1:1:0:290:1aff:fe40:1d44/64 (eui-64)
      IPv6 statistics:
        Rcvd:  0 local destination
               0 hdr errors, 0 addr errors
               0 unkn proto, 0 discards
        Sent:  0 generated, 0 no routes, 0 discards

      ICMPv6 statistics:
        Rcvd:  0 local destination
               0 hdr errors, 0 addr errors
               0 unkn proto, 0 discards
        Sent:  0 generated, 0 no routes, 0 discards

      ICMPv6 statistics:
        Rcvd:  0 destination unreach, 0 admin unreach, 0 parameter problem
               0 time exceeded, 0 pkt too big, 0 echo requests
               0 echo replies
        Sent:  0 destination unreach, 0 admin unreach, 0 parameter problem
               0 time exceeded, 0 pkt too big, 0 echo requests
               0 echo replies

        Operational MTU 1500 Administrative MTU 0
        Operational speed 100000000 Administrative speed 0
        Creation type Static
        Neighbor Discovery is disabled

        ICMPv6 statistics:
          Rcvd:  0 total, 0 errors
                 0 rtr solicits, 0 rtr advertisements
                 0 neighbor solicits, 0 neighbor advertisements
                 Group membership: 0 queries, 0 responses, 0 reductions
                 0 redirects
          Sent:  0 total, 0 errors
                 0 rtr solicits, 0 rtr advertisements
                 0 neighbor solicits, 0 neighbor advertisements
                 Group membership: 0 queries, 0 responses, 0 reductions
                 0 redirects

        In Received Packets 0, Bytes 0
          Unicast Packets 0, Bytes 0
          Multicast Packets 0, Bytes 0
        In Total Dropped Packets 0, Bytes 0
          In Policed Packets 0
          In Invalid Source Address Packets 0
          In Error Packets 0
          In Discarded Packets 0

        Out Forwarded Packets 0, Bytes 0
          Unicast Packets 0, Bytes 0
          Multicast Routed Packets 0, Bytes 0
        Out Total Dropped Packets 0, Bytes 0
          Out Scheduler Dropped Packets 0, Bytes 0
          Out Policed Packets 0
          Out Discarded Packets 0
      IPv6 policy input ipv6InPol25
          rate-limit-profile Rlp2Mb classifier-group clgA entry 1
            Committed: 0 packets, 0 bytes
            Conformed: 0 packets, 0 bytes
            Exceeded:  0 packets, 0 bytes
          rate-limit-profile Rlp8Mb
            Committed: 0 packets, 0 bytes
            Conformed: 0 packets, 0 bytes
            Exceeded:  0 packets, 0 bytes
        IPv6 policy output ipv6PolOut2
          rate-limit-profile RlpOutA classifier-group clgB entry 1
            Committed: 0 packets, 0 bytes
            Conformed: 0 packets, 0 bytes
            Exceeded:  0 packets, 0 bytes
          rate-limit-profile RlpOutB
            Committed: 0 packets, 0 bytes
            Conformed: 0 packets, 0 bytes
            Exceeded:  0 packets, 0 bytes
        IPv6 policy local-input ipv6PolLocIn5
          rate-limit-profile Rlp1Mb classifier-group clgC entry 1
            Committed: 0 packets, 0 bytes
            Conformed: 0 packets, 0 bytes
            Exceeded:  0 packets, 0 bytes
          rate-limit-profile Rlp5Mb
            Committed: 0 packets, 0 bytes
            Conformed: 0 packets, 0 bytes
            Exceeded:  0 packets, 0 bytes
        queue 0: traffic class best-effort, bound to ipv6 FastEthernet9/0.6
          Queue length 0 bytes
          Forwarded packets 0, bytes 0
          Dropped committed packets 0, bytes 0
          Dropped conformed packets 0, bytes 0
          Dropped exceeded packets 0, bytes 0

- Example 6

      host1# show ipv6 interface brief
          Interface         IPv6-Address    Status  Protocol   Description
      ----------------- ------------------ ------- -------- ----------------
      null0                 Unnumbered       up      up
      FastEthernet9/1.5     5:1:1::2/64      up      up     IPv6 interface in
                                                            Virtual Router Hop
                                                                  5
      FastEthernet9/0.6     6:1:1::1/64      up      up     IPv6 interface in
                                                            Virtual Router Hop
                                                                   6
      loopback5          10:1:1:0:290:1aff:fe up      up
                         40:1d44/64

- See show ipv6 address
- See show ipv6 interface

show ipv6 forwarding-table slot

- Use to display details on the forwarding table for a specific line module only when IPv6 is configured on the router. These details include the memory used by each virtual router configured on the line module and free memory available on the module.
- The Load Errors field records any failed routing table distribution attempt as an error. Attempts can fail for many reasons during normal operation; a failed attempt does not necessarily indicate a problem. It is normal to see many Load Errors per day.
- If the Status field does not indicate Valid, then the routing table distribution has failed constantly for that VR. It is normal and appropriate behavior for the Status field to indicate Valid while the Load Error field increases daily.
- Field descriptions
  - Free Memory—Amount of routing table memory free on the line module, in kilobytes
  - Virtual Router—Name of the virtual routers configured on the line module
  - Memory (KB)—Amount of routing table memory consumed by the virtual router, in kilobytes
  - Load Errors—Count of errors made while loading the routing table on the line module
  - Status—Whether the routing table for the virtual router is valid
- Example

      host1#show ipv6 forwarding-table slot 9
      Free Memory = 32766 KB (99.99%)
               Virtual Router            Memory(KB)    Load Errors      Status
      -------------------------------- -------------- ------------- --------------
      default                          -              -             Not Resident
      1                                2              0             Valid

- See show ipv6 forwarding-table slot.

show ipv6 local pool

- Use to display information on IPv6 local address pools, such as prefix delegation parameters and attributes that control the assignment of prefixes to requesting routers.
- Specify the pool name to limit the display to a specific IPv6 local pool.
- Specify the statistics keyword to display IPv6 local address pool statistics for prefix delegation.
- Use the optional delta keyword with the show ipv6 local pool command to specify that baseline-relative statistics are to be shown. You must use the baseline ipv6 local pool command to set a baseline.
- Field Descriptions
  - IPv6 Local Address Pools:
    - Pool—Names of IPv6 local address pools configured on the virtual router
    - Start—Starting prefix of the range of prefixes configured in a particular pool
    - End—Ending prefix of the range of prefixes configured in a particular pool
    - Total—Number of prefixes available for allocation to clients from a particular pool
    - In Use—Number of prefixes in a pool that are currently used by DHCPv6 clients
  - Pool—Name of the IPv6 local address pool for which prefix delegation details are displayed
  - Utilization—Percentage of IPv6 prefixes allocated to clients from the local address pool
  - Start—Starting prefix of the range of prefixes configured in a particular pool
  - End—Ending prefix of the range of prefixes configured in a particular pool
  - Total—Number of prefixes available for allocation to clients from a particular pool
  - In Use—Number of prefixes in a pool that are currently used by DHCPv6 clients
  - Preferred Lifetime—Amount of time for which the prefix remains preferred for the requesting router to use
  - Valid Lifetime—Amount of time for which the prefix remains valid for the requesting router to use
  - Exclude—Prefix length or prefix range excluded from allocation to the requesting router
  - Dns Servers—List of IPv6 addresses of DNS servers to be sent to clients in the DHCPv6 responses
  - Domain Search List—List of domain names configured in the IPv6 local pool for DNS resolution
  - IPv6 Local Address Pool Statistics:
    - Allocations—Number of prefixes allocated to DHCPv6 clients from the local address pool
    - Allocation Errors—Number of errors encountered during the allocation of prefixes
    - Releases—Number of prefixes released by the requesting router or client to be made available to the IPv6 local pool for the delegating router to reassign them to other clients
    - Release Errors—Number of errors encountered during the process of release of previously assigned prefixes by the requesting router
- Example 1— Displaying information on IPv6 local address pools

      host1#show ipv6 local pool
                               IPv6 Local Address Pools
                               ------------------------
            Pool                   Start                        End
      ----------------   -------------------------   -------------------------
      example            2002:2002::/48              2002:2002:ffff::/48
      example            3003:3003::/56              3003:3003:0:1000::/56
      example            4004:4004:0:ff00::/64       4004:4004:0:ffff::/64
      example            5005:5005::/48              5005:5005:ffff::/48
      test               6006:6006:ffff::/60         6006:6006:ffff:fff0::/60

            Pool          Total    In Use
      ----------------   -------   -------
      example            65536     0
      example            17        0
      example            256       0
      example            65536     0
      test               4096      0

- Example 2—Displaying prefix delegation details for an IPv6 local address pool configured on a virtual router

      host1#show ipv6 local pool example
      Pool : example
      --------------
      Utilization : 0
                Start                        End               Total    In Use    Exclude   Util
      -------------------------   -------------------------   -------   -------   -------   ----
      2002:2002::/48              2002:2002:ffff::/48         65536     0         0         0
      3003:3003::/56              3003:3003:0:1000::/56       17        0         0         0
      4004:4004:0:ff00::/64       4004:4004:0:ffff::/64       256       0         0         0
      5005:5005::/48              5005:5005:ffff::/48         65536     0         10        0
                                  Preferred      Valid
                Start              Liftime      Lifetime
      -------------------------   ----------   ----------
      2002:2002::/48              1 day        1 day
      3003:3003::/56              1 day        1 day
      4004:4004:0:ff00::/64       1 day        1 day
      5005:5005::/48              infinite     infinite
      Exclude                5005:5005:1::/48
                             5005:5005:2::/48 - 5005:5005:a::/48
      Dns Servers            3001::1
                             3001::2
      Domain Search List     test1.com
                             test2.com
                             test3.com
                             test4.com

- Example 3—Displays IPv6 local address pool statistics used for DHCP prefix delegation to requesting routers

      host1#show ipv6 local pool statistics
      IPv6 Local Address Pool Statistics
      ----------------------------------
          Statistic       Value
      -----------------   -----
      Allocations         0
      Allocation Errors   0
      Releases            0
      Release Errors      0

show ipv6 neighbors

- Use to display IPv6 Neighbor Discovery cache information static entries, dynamic entries, or both.
- Use the static keyword to display only static entries
- Use the dynamic keyword to display only dynamic entries
- Use the summary keyword to display summary information
- Field descriptions
  - Interface—Neighbor interface
  - IPv6-Address—IPv6 address for the interface
  - Type—Type of interface (dynamic, static)
  - Hardware Addr—Layer 2 address of the interface
  - State—State of the interface (delay, incomplete, probe, reachable, stale)
  - Age—Amount of time (in seconds) since the router contacted the neighbor
  - By type—List by neighbor type (global, link-local, anycast, and unknown)
  - By state—List by neighbor state (reachable, incomplete, stale, probe, delay, an init)
  - IPv6 address conflicts—Number of conflicts during or after duplicate address detection resolution
- Example 1

      host1# show ipv6 neighbors
         Interface         IPv6-Address    Type   Hardware Addr  State  Age
      ----------------- ----------------- ------- -------------- ----- -----
      FastEthernet4/1        1::1          dynamic 0090.1a40.05e5 reach 3

- Example 2

      host1# show ipv6 neighbors summary
      Total IPv6 neighbors: 7
      By type: 5 global, 2 link-local, 0 anycast, 0 unknown
      By state: 5 reachable, 0 incomplete, 2 stale, 0 probe, 0 delay, 0 init
      IPv6 address conflicts: 0 during DAD resolution, 0 after DAD resolution

- See show ipv6 neighbors

show ipv6 profile

- Use to display information about a specific IPv6 profile.
- Field descriptions
  - IPv6 profile—Profile name
  - Unnumbered interface—Specifier for the unnumbered interface or none if the interface is numbered
  - Router—Router name
  - Access Route Addition—Enabled or disabled
  - Source-Address Validation—Enabled or disabled
  - Administrative MTU—MTU size
- Example

      host1#show ipv6 profile foo
      IPv6 profile : foo
      Unnumbered interface on : loopback 0
      Router                     : r1
      Access Route Addition      : Enabled
      Source-Address Validation  : Disabled
      Administrative MTU         : 0

- See show ipv6 profile

show ipv6 protocols

- Use to display configured protocols.
- Field descriptions
  - Local router ID—Router ID of the local router
  - Local AS—AS number of local router
  - Administrative state—Administrative state of the protocol
  - Operational state—Operational state of the protocol
  - Shutdown in overload state—Status of shutdown in an overload state
  - Default local preference—Default value for local preference
  - IGP synchronization—Indicates whether synchronization is enabled or disabled
  - Default originate—Indicates whether network 0.0.0.0 is redistributed into BGP
  - Auto summary—Status of autosummary
  - Always compare MED—Status of always compare MED
  - Compare MED within confederation—Status of compare MED within a confederation
  - Advertise inactive routes—Status of Advertise inactive routes
  - Advertise best external router to internal peers—Status of Advertise best external router to internal peers
  - Enforce first AS—Status of Enforce first AS
  - Missing MED as worst—Status of Missing MED as worst
  - Route flap dampening—Status of route dampening
  - Log neighbor changes—Status of Log neighbor changes
  - Fast External Fallover—Status of Fast External Fallover
  - Maximum received AS-path length—Maximum AS-path length received
  - BGP administrative distances—External, internal, and local BGP administrative distances
  - Client-to-client reflection—Whether client-to-client reflection is configured
  - Cluster ID—Cluster IDs
  - Route-target filter—Status of Route-target filter
  - Default IPv4-unicast—Status of Default IPv4-unicast
  - Local-RIB version—RIB version
  - Local-FIB version—FIB version
  - Neighbor(s)—BGP neighbors (if configured)
  - Networks for which routing is occurring
  - Aggregate Generation for Unicast Routes
- Example 1

      host1#show ipv6 protocols
      Routing Protocol is “ bgp 100"
        Local router ID 1.1.1.1, local AS 100
        Administrative state is Start
        Operational state is Up
        Shutdown in overload state is disabled
        Default local preference is 100
        IGP synchronization is enabled
        Default originate is disabled
        Auto summary is enabled
        Always compare MED is disabled
        Compare MED within confederation is disabled
        Advertise inactive routes is disabled
        Advertise best external route to internal peers is disabled
        Enforce first AS is disabled
        Missing MED as worst is disabled
        Route flap dampening is disabled
        Log neighbor changes is disabled
        Fast External Fallover is disabled
        No maximum received AS-path length
        BGP administrative distances are 20 (ext), 200 (int), and 200 (local)
        Client-to-client reflection is enabled
        Cluster ID is 1.1.1.1
        Route-target filter is enabled
        Default IPv4-unicast is enabled
        Local-RIB version 8. FIB version 8.
        Neighbor(s):
          No neighbors are configured
        Routing for Networks:
        Aggregate Generation for Unicast Routes:

- Example 2

      host1#show ipv6 protocols summary
      bgp 100

- See show ipv6 protocols

show ipv6 redistribute

- Use to display configured route redistribution policy.
- Field descriptions
  - To—Protocol that routes are distributed into
  - From—Protocol that routes are distributed from
  - status—Redistribution status
  - route map name—Name of the route map
- Example

      host1#show ipv6 redistribute
      To bgp, From static is enabled with route map foo
      To bgp, From connected is enabled without a route map

- See show ipv6 redistribute

show ipv6 route

- Use to display the current state of the routing table, including routes not used for forwarding.
- You can display all routes, a specific route, detailed information about all or a specific route, or summary counters for the routing table.
- Field descriptions
  - Prefix—IPv6 address prefix
  - Length—Prefix length
- Type—Protocol type (possible route types include: Bgp, Connect, Idrp, Igrp, Invalid, Isis, Ndisc, Ospf, Other, Rip, Static)
  - Dst (or Distance)—Administrative distance for the route
  - Met (or Metric)—Number of hops
  - Intf (or Interface)—Interface type and interface specifier
  - NextHop—The configured next hop address for this interface
  - IfIndex—An autogenerated value for the next hop interface
- Example 1

      host1#show ipv6 route
               Prefix/Length            Type   Dst/Met         Intf
      -------------------------------- ------- ------- --------------------
      1::/16                           Connect 0/0     loopback1
      5::/64                           Connect 0/0     ATM4/0.15
      6::/64                           Static  1/0     ATM4/0.15
      2003::/16                        Static  1/0     ATM4/0.15

- Example 2

      host1#show ipv6 route summary
      Unicast routes:
      8 total routes, 576 bytes in route entries
      0 isis routes
      0 rip routes
      3 static routes
      2 connected routes
      1 bgp routes
      0 ospf routes
      2 other internal routes
      0 access routes
      0 internally created access host routes

      Last route added/deleted: 2::4/128 by BGP
      At MON FEB 04 2008 14:18:25 UTC

      Unicast routes used only for Multicast RPF check:
      0 total routes, 0 bytes in route entries
      0 isis routes
      0 rip routes
      0 static routes
      0 connected routes
      0 bgp routes
      0 ospf routes
      0 other internal routes
      0 access routes
      0 internally created access host routes
      0 mbgp routes
      0 dvmrp routes

      Last route added/deleted: null by Invalid
      At MON FEB 04 2008 14:18:04 UTC

      MPLS tunnel routes (not used for forwarding):
      3 total routes, 216 bytes in route entries
      1 bgp tunnel routes
      1 ldp tunnel routes
      1 rsvp tunnel routes

      Last route added/deleted: 2::4/128 by BGP Tunnel
      At MON FEB 04 2008 14:18:26 UTC

- Example 3

      host1#show ipv6 route 5::/64 detail
      5::/64 Type:local  Distance:0  Metric:0
              NextHop: 1::2  IntfIndex 10007 Intf ATM4/0.15

- See show ipv6 route

show ipv6 routers

- Use to display IPv6 router advertisement information received.
- Use the conflicts keyword to display router advertisements that differ from the advertisements configured
- Field descriptions
  - Route—Router for which this information applies
  - Hops—Number of hops that the router uses in router advertisements
  - Lifetime—Lifetime (in seconds) of the neighbor discovery router advertisement
  - AddrFlag—State of the neighbor discovery router advertisement managed flag
  - OtherFlag—State of the neighbor discovery router advertisement other config flag
  - Reachable time—Amount of time (in milliseconds) that the neighbor is expected to remain reachable
  - Retransmit time—Interval in which the router retransmits neighbor solicitations
  - Prefix—IPv6 network number to include in router advertisements
  - Autoconfig—When present, indicates that local host links use the specified prefix for IPv6 autoconfiguration
  - Valid lifetime—Amount of time in seconds that the router advertises the IPv6 prefix as valid
  - preferred lifetime—Amount of time in seconds that the router advertises the specified IPv6 prefix as preferred
- Example 1

      host1#show ipv6 routers
      Router FE80::83B3:60A4 on FastEthernet2/0, last update 3 min
        Hops 0, Lifetime 6000 sec, AddrFlag=0, OtherFlag=0
        Reachable time 0 msec, Retransmit time 0 msec
        Prefix 3FFE:C00:8007::800:207C:4E37/96 autoconfig
          Valid lifetime -1, preferred lifetime -1

      Router FE80::290:27FF:FE8C:B709 on FastEthernet2/1, last update 0 min
        Hops 64, Lifetime 1800 sec, AddrFlag=0, OtherFlag=0
        Reachable time 0 msec, Retransmit time 0 msec

- Example 2

      host1#show ipv6 routers conflicts
      Router FE80::203:FDFF:FE34:7039 on FastEthernet1/0, last update 1 min, CONFLICT
         Hops 64, Lifetime 1800 sec, AddrFlag=0, OtherFlag=0
         Reachable time 0 msec, Retransmit time 0 msec
         Prefix 2003::/64 onlink autoconfig
           Valid lifetime -1, preferred lifetime -1

- See show ipv6 routers

show ipv6 static

- Use to display the status of static routes in the routing table.
- You can specify an IP mask that filters specific routes.
- Field descriptions
  - Prefix—IP address prefix
  - Length—Prefix length
  - Next Hop—IP address of the next hop
  - Dst—Administrative distance of the route
  - Met—Number of hops
  - Interface—Interface type and interface specifier
- Example

      host1# show ipv6 static
          Prefix/Length          NextHop        Dst/Met    Interface
      -------------------- -------------------- ------- ------------------
      6::/64                   5::2               1/0     ATM4/0.15
      2003::/16                5::1               1/0     ATM4/0.15

- See show ipv6 static

show ipv6 traffic

- Use to display statistics about IPv6 traffic.
- Field descriptions
  - IPv6 statistics Rcvd:
    - total—Total number of packets received
    - local destination—Number of packets received with this router as their destination
    - hdr errors—Number of packets containing header errors
    - addr errors—Number of packets containing addressing errors
    - unkn proto—Number of packets received containing unknown protocols
    - discards—Number of discarded packets
  - IPv6 statistics Sent:
    - forwarded—Number of packets forwarded
    - generated—Number of packets generated
    - out disc—Number of packets that could not be routed that were discarded
  - IPv6 statistics Mcast:
    - received—Number of multicast packets received
    - forwarded—Number of multicast packets forwarded
  - IPv6 statistics (Routes)—Number of routes currently in the routing table
  - ICMPv6 statistics Rcvd:
    - total—Total number of received packets
    - errors—Error packets received
    - destination unreach—Packets received with destination unreachable
    - admin unreach—Packets received because the destination was administratively unreachable (for example, the packet encountered a firewall filter)
    - parameter problem—Packets received with parameter errors
    - time exceeded—Packets received with time-to-live exceeded
    - pkt too big—Number of packet-too-big messages received that indicate a packet was too large to forward because of the allowed MTU size
    - redirects—Received packet redirects
    - echo requests—Echo request (ping) packets
    - echo replies—Echo replies received
    - rtr solicits—Number of received router solicitations
    - rtr advertisements—Number of received router advertisements
    - neighbor solicits—Number of received neighbor solicitations
    - neighbor advertisements—Number of received neighbor advertisements
    - Group membership (queries, responses, reductions)—Number of queries, responses, and reduction requests received from within a group to which the interface is assigned
  - ICMP statistics Sent:
    - total—Total number of received packets
    - errors—Error packets received
    - destination unreach—Packets received with destination unreachable
    - admin unreach—Packets sent because the destination was administratively unreachable (for example, due to a firewall filter)
    - parameter problem—Packets received with parameter errors
    - time exceeded—Packets received with time-to-live exceeded
    - pkt too big—Number of packet-too-big messages sent because a received packet was too large to forward because of the allowed MTU size
    - redirects—Received packet redirects
    - echo requests—Echo request (ping) packets
    - echo replies—Echo replies received
    - rtr solicits—Number of sent router solicitations
    - rtr advertisements—Number of sent router advertisements
    - neighbor solicits—Number of sent neighbor solicitations
    - neighbor advertisements—Number of sent neighbor advertisements
    - Group membership (queries, responses, reductions)—Number of queries, responses, and reduction requests sent to a group to which the interface is assigned
  - UDP Statistics Rcvd:
    - total—Total number of received packets
    - checksum errors—Checksum error packets received
    - no port—No port error packets received
  - UDP Statistics Sent:
    - total—Total number of received packets
    - errors—Error packets received
- Example

      host1#show ipv6 traffic
      IPv6 statistics:
        Rcvd:  0 total, 0 local destination
               0 hdr errors, 0 addr errors
               0 unkn proto, 0 discards
        Sent:  0 forwarded, 0 generated
               0 out disc
        Mcast: 0 received 0 forwarded
        Routes: 7 in routing table

      ICMPv6 statistics:
        Rcvd:  0 total, 0 errors
               0 destination unreach, 0 admin unreach, 0 parameter problem
               0 time exceeded, 0 pkt too big, 0 redirects
               0 echo requests, 0 echo replies
               0 rtr solicits, 0 rtr advertisements
               0 neighbor solicits, 0 neighbor advertisements
               Group membership: 0 queries, 0 responses, 0 reductions
        Sent:  3 total, 0 errors
               0 destination unreach, 0 admin unreach, 0 parameter problem
               0 time exceeded, 0 pkt too big, 0 redirects
               0 echo requests, 0 echo replies
               0 rtr solicits, 0 rtr advertisements
               2 neighbor solicits, 1 neighbor advertisements
               Group membership: 0 queries, 0 responses, 0 reductions

      UDP Statistics:
        Rcvd: 0 total, 0 checksum errors, 0 no port
        Sent: 0 total, 0 errors

- See show ipv6 traffic

show ipv6 udp statistics

- Use to display IPv6 UDP statistics.
- Example

      host1#show ipv6 udp statistics
      UDP Statistics:
        Rcvd: 0 total, 0 checksum errors, 0 no port
        Sent: 0 total, 0 errors

- See show ipv6 udp statistics

show license ipv6

- Use to display the IPv6 license key configured on the router.
- Example

      host1#show license ipv6
      Ipv6 license is ipv6_license

- See show license

show tcp statistics

- Use to display all TCP statistics (both IPv4 and IPv6).
- Baselining is supported for this command.
- Use the ip keyword to display only IPv4 statistics.
- Use the ipv6 keyword to display only IPv6 statistics.
- Use the brief keyword to display summary information or the detailed keyword to display extensive information.
- Use the diagnostic keyword to display diagnostic information collected on the TCP statistics in addition to the detailed information. This command shows information only for the connections that are active within the context of the VR in which you issue the command.
- Field descriptions
  - TCP Global Statistics Connections:
    - attempted—Number of outgoing TCP connections attempted
    - accepted—Number of incoming TCP connections accepted
    - established—Number of TCP connections established
  - TCP Global Statistics Rcvd:
    - total pkts—Total number of packets received
    - in-sequence pkts—Number of packets received in sequence
    - bytes—Number of bytes received
    - chksum err pkts—Number of checksum error packets received
    - authentication err pkts—Number of authentication error packets received
    - bad offset pkts—Number of bad offset packets received
    - short pkts—Number of short packets received
    - duplicate pkts—Number of duplicate packets received
    - out of order pkts—Number of packets received out of order
  - TCP Global Statistics Sent:
    - total pkts—Total number of packets sent
    - data pkts—Number of data packets sent
    - bytes—Number of bytes sent
    - retransmitted pkts—Number of packets retransmitted
    - retransmitted bytes—Number of bytes retransmitted
  - Global Diagnostic Data Unknown Connection log—Includes the following global statistics:
    - Source address/port – local port—Shows the 32 most recent TCP connection attempts that were rejected, including the remote node’s IP or IPv6 address and port, the local port for the connection attempt, and the number of identical attempts that have been received on that port in a row. The reason for rejection is not given. This information may be useful in tracking down DoS attacks.
    - # connection-reqs rejected—Total number of connection attempts that have been rejected
    - # connection-reqs pending—Current number of connection attempts that are pending, awaiting additional data from the peer
    - # sonewconn calls that fail—Number of calls to sonewconn that have failed. This statistic often indicates that either a socket connection limit has been reached or that there was no memory to hold the socket data structures.
  - TCP Session Statistics
    - Local addr—Local address of the TCP connection
    - Local port—Local port number of the TCP connection
    - Remote addr—Remote address of the TCP connection
    - Remote port—Remote port number of the TCP connection
    - State—Current state of the TCP connection
    - Authentication—Authentication status of the TCP connection
  - TCP Session Statistics Sent:
    - total pkts—Total number of packets sent on the TCP connection
    - data pkts—Number of data packets sent on the TCP connection
    - bytes—Number of bytes sent on the TCP connection
    - retransmitted pkts—Number of packets retransmitted on the TCP connection
    - retransmitted bytes—Number of bytes retransmitted on the TCP connection
  - TCP Session Statistics Rcvd:
    - total pkts—Total number of packets received on the TCP connection
    - in-sequence pkts—Number of packets received in sequence on the TCP connection
    - bytes—Number of bytes received on the TCP connection
    - chksum err pkts—Number of checksum error packets received on the TCP connection
    - bad offset pkts—Number of bad offset packets received on the TCP connection
    - short pkts—Number of short packets received on the TCP connection
    - duplicate pkts—Number of duplicate packets received on the TCP connection
    - out of order pkts—Number of packets received out of order on the TCP connection
  - Diagnostics: PRU_ Operations counters—Number of calls for each of the indicated PRU_operations within the TCP service API. These are per-connection statistics.
  - Wildcard Matches—Number of packets received that matched this TCP connection due to wildcard matching. Matching is expected for listening server connections, such as Telnet, but is not expected for established connections. This is a per-connection statistic.
  - Rcv'd Packets after connection closed—Number of packets received on the connection after the connection has been closed (and before the data structure gets removed). This is a per-connection statistic.
  - Connect request rejected—Number of times an incoming connection request was not approved. This is a per-connection statistic.
  - Connect request approval pending—Number of times that an incoming connection request was held pending, waiting for a subsequent packet. This is a per-connection statistic.
  - New soconnect failed—Number of times a SONEWCONN() was tried on a listening connection and failed. This is a per-connection statistic.
  - # Write-Wakeups—Number of times a “ write wakeup” occurred on the connection. This is a per-connection statistic.
  - # Read wakeups—Number of times a “ read wakeup” occurred on the connection. This is a per-connection statistic.
  - # receives after close—Number of packets received with data after the connection entered the close-wait state. This is a per-connection statistic.
  - Retransmit timer—Current value of the retransmit timer
  - Persistence timer—Current value of the persistence timer
  - Keepalive timer—Current value of the keepalive timer
  - 2MSL timer—Current value of the 2MSL (max segment lifetime) timer
  - tcpDisconnect()s—Number of times BsdTcp::tcpDisconnect() was called. This is a per-connection statistic.
  - keep T/O pre-estab—Number of times the keepalive timer expired before the connection reached the established state. This is a per-connection statistic.
  - tcpkeeptimeo_idle—Number of times the keepalive timer popped, but no keepalive was sent because of connection idle-time considerations. This is a per-connection statistic.
  - TCP Connection Event Log (most recent at bottom)—Event log for the TCP connection. It shows the last 32 events that occurred on the connection. The most recent event is at the bottom of the list. This is per-connection data.
    - TCPS_ELOG_PRU_ATTACH
    - TCPS_ELOG_PRU_BIND

    The following events can be recorded:

    Fast Timeout | Did a PRU_CONNECT
    2MSL Timeout | Did a PRU_CONNECT2
    Retransmit Timeout | Did a PRU_DISCONNECT
    Persist Timeout | Did a PRU_ACCEPT
    Received FIN packet | Did a PRU_SHUTDOWN
    Received SYN packet | Did a PRU_RCVD
    Received Retransmission | Did a PRU_SEND
    Transmit a FIN packet | Did a PRU_ABORT
    Transmit a SYN packet | Did a PRU_SENSE
    Retransmit a packet | Did a PRU_RCVOOB
    Did a PRU_ATTACH | Did a PRU_SENDOOB
    Did a PRU_DETACH | Did a PRU_SOCKADDR
    Did a PRU_BIND | Did a PRU_PEERADDR
    Did a PRU_LISTEN | The keepalive timer popped. An 8-bit argument that describes how the timer was handled: Ignored because the session was not established (that is, not in the OPEN state) Ignored due to idle-timeout considerations A packet was sent Ignored because the connection did not have the keepalive option set OR the connection was in the process of closing

  - RST/SYN-Ack DoS Protection—Specifies when this function is enabled
    - RSTs acked—Number of RSTs received and then acknowledged by the TCP stack.

      | Note: This count is maintained even when the protection functions are disabled. The value indicates the count of packets that would have been acknowledged if the protections were enabled. Providing this information can help determine whether attacks are occurring.

    - Bogus RSTs—Number of RSTs that were judged to be invalid (that is, their timer expired) and therefore ignored
    - SYNs acked—Number of SYNs received and then acknowledged by the TCP stack.

      | Note: This count is maintained even when the protection functions are disabled. The value indicates the count of packets that would have been acknowledged if the protections were enabled. Providing this information can help determine whether attacks are occurring.

    - Bogus SYNs—Number of RSTs that were judged to be invalid (that is, their timer expired) and therefore ignored
    - Data Insertions rejected—Number of packets received and dropped because they are believed to have been inserted by an attacker

      | Note: This count is maintained even when the protection functions are disabled. The value indicates the count of packets that would have been rejected if the protections were enabled. Providing this information can help determine whether attacks are occurring.

  - PMTUD information—Information regarding path MTU discovery
    - PMTUD—Status of path MTU discovery on the virtual router: enabled or disabled
    - Administrative Minimum MTU—Minimum MTU that is enabled on any connection; a value of “ none” indicates that the minimum is zero (0)
    - Administrative Maximum MTU—Maximum MTU that is enabled on any connection; a value of “ none” indicates that the maximum is 65535
    - Timer 1—Amount of time the virtual router waits after receiving an ICMP Too Big message before attempting to increase the path MTU
    - Timer 2—Amount of time the virtual router waits after successfully increasing the MTU before attempting to increase it more
    - # ICMP TooBigs—Number of ICMP Too Big messages that the router has received. When PMTU is disabled, this counter does not increase.
    - # ICMP TooBigs for unk. connection—Number of ICMP Too Big messages that the router has received for TCP connections that do not exist. When PMTU is disabled, this counter does not increase.
    - PMTU Increase Attempts—Number of attempts the router has made to increase the PMTU
    - Black Hole Detect Threshold—Number of successive transmissions that must occur on a connection before that connection treats retransmissions as indications that something is wrong
    - Override MSS—MSS that is advertised to peers, overriding the MSS that is derived from the interface MTU. This line does not appear in the output if you do not set the value.
  - MTU/MSS information—Information regarding path MTU/MSS
    - PMTU—Status of MTU/MSS on this virtual router: enabled or disabled
    - MSS in effect—MSS currently being used for transmission to the peer. This number changes while various network events occur to cause the router to increase or decrease its estimate of the MSS.
    - Calculated MSS to peer—MSS that path MTU discovery has calculated (if PMTUD is enabled) to the peer
    - MSS received from peer—MSS that the peer received in a TCP MSS option. If no option is received, the value is zero (0).
    - Application set MSS—MSS that an application might have set for the connection
    - Xmit Interface MSS—MSS for the interface used to transmit packets to the peer; calculated as the interface MTU minus the size of the TCP and IP headers.
    - MSS Sent to Peer—MSS that has been advertised to the peer
    - “ICMP DestUn, Frag Req’d and DF Set” messages—Number of ICMP “Destination Unreachable: Fragmentation Required and DF set” messages that the router has received
    - Number of attempts to increase PMTU—Number of times the router has attempted to increase the PMTU by probing with a packet that is larger than the known MTU
    - Time to next increase attempt—Amount of time, in seconds, until the router retries to increase the MTU
    - Black Hole Detection State—State of the black hole detection mechanism: none, detecting, probable, or unknown
  - Out-of-Order Packet Queue Information—Information regarding packet queue buffers
    - Buffers Outstanding—Number of buffers currently on the connection reordering queue
    - High Water—Most buffers that have ever been on the connection reordering queue
    - Buffers discarded—Number of buffers that were discarded because keeping them would have exceeded the connection maximum
  - TCP PAWS is [enabled/disabled]—Status of the TCP PAWS option; enabled indicates that PAWS is functioning normally (default mode) for TCP segments; disabled indicates that PAWS is disabled for TCP segments
- Example 1

      host1#show ipv6 tcp statistics
      TCP Global Statistics:
        Connections: 7358 attempted, 4 accepted, 7362 established
              0 dropped, 14718 closed
        Rcvd: 75923 total pkts, 53608 in-sequence pkts, 3120303 bytes
              0 chksum err pkts, 0 authentication err pkts, 0 bad offset pkts
              0 short pkts, 0 duplicate pkts, 0 out of order pkts
        Sent: 82352 total pkts, 44404 data pkts, 657095 bytes
              34 retransmitted pkts, 487 retransmitted bytes

      TCP Session Statistics:
        Local addr: 0.0.0.0, Local port: 23
        Remote addr: 0.0.0.0, Remote port: 0
        State: LISTEN Authentication: None
        Rcvd: 4 total pkts, 0 in-sequence pkts, 0 bytes
              0 chksum err pkts, 0 bad offset pkts, 0 short pkts
              0 duplicate pkts, 0 out of order pkts
        Sent: 0 total pkts, 0 data pkts, 0 bytes
              0 retransmitted pkts, 0 retransmitted bytes

        Local addr: 192.168.1.250, Local port: 23
        Remote addr: 10.10.0.77, Remote port: 2170
        State: ESTABLISHED Authentication: None
        Rcvd: 61 total pkts, 34 in-sequence pkts, 41 bytes
              0 chksum err pkts, 0 bad offset pkts, 0 short pkts
              0 duplicate pkts, 0 out of order pkts
        Sent: 64 total pkts, 45 data

        Local addr: 192.168.1.250, Local port: 23
        Remote addr: 10.10.0.77, Remote port: 2170
        State: ESTABLISHED Authentication: None
        Rcvd: 61 total pkts, 34 in-sequence pkts, 41 bytes
              0 chksum err pkts, 0 bad offset pkts, 0 short pkts
              0 duplicate pkts, 0 out of order pkts
        Sent: 64 total pkts, 45 data pkts, 2304 bytes
              0 retransmitted pkts, 0 retransmitted bytes
       Local addr: 192.168.1.250, Local port: 23
        Remote addr: 192.168.1.139, Remote port: 1038
        State: ESTABLISHED Authentication: None
        Rcvd: 295 total pkts, 159 in-sequence pkts, 299 bytes
              0 chksum err pkts, 0 bad offset pkts, 0 short pkts
              0 duplicate pkts, 0 out of order pkts
        Sent: 281 total pkts, 210 data pkts, 3089 bytes
              0 retransmitted pkts, 0 retransmitted bytes

- Example 2—Additional fields displayed by diagnostic keyword

      host1#show tcp statistics diagnostic
      ...
      Global Diagnostic Data
          Unknown Connection log
      Source address/port -> local port
               128.127.126.125/124 -> 8080  count: 3
               111.111.111.111/222 -> 3333  count: 4
      # connection-reqs rejected: 0
          # connection-reqs pending: 0
          # sonewconn calls that fail: 0
      ...
        Diagnostics:
          PRU_ Operations counters:
            PRU_ATTACH: 0
            PRU_DETACH: 0
            PRU_BIND: 1
            PRU_LISTEN: 1
            PRU_CONNECT: 0
            PRU_ACCEPT: 0
            PRU_DISCONNECT: 0
            PRU_SHUTDOWN: 0
            PRU_RCVD: 0
            PRU_SEND: 0
            PRU_ABORT: 0
            PRU_CONTROL: 0
            PRU_SENSE: 0
            PRU_RCVOOB: 0
            PRU_SENDOOB: 0
            PRU_SOCKADDR: 0
            PRU_PEERADDR: 0
            PRU_CONNECT2: 0
            PRU_FASTTIMO: 0
            PRU_SLOWTIMO: 0
            PRU_PROTORCV: 0
            PRU_PROTOSEND: 0
          Wildcard Matches: 2
          Rcv'd Packets after connection closed: 0
          Connect request rejected: 0
          Connect request approval pending 0
          New soconnect failed 0
          # Write-Wakeups: 0
          # Read wakeups 0
          # receives after close 0
          Retransmit timer: 0
          Persistance timer: 0
          Keepalive timer: 0
          2MSL timer: 0
          tcpDisconnect()s: 0
          keep T/O pre-estab: 0
          tcpkeeptimeo_idle: 0
      ...
      TCP Connection Event Log (most recent at bottom)
            TCPS_ELOG_PRU_ATTACH
            TCPS_ELOG_PRU_BIND

- Example 3—Additional fields displayed by detailed keyword

      host1#show tcp statistics detailed
      ...

      RST/SYN-Ack Protection is: ENABLED
          RSTs acked: 0
          ...Bogus RSTs: 0
          SYNs acked: 0
          ...Bogus SYNs: 0
          Data Insertions rejected: 0
      PMTUD Information:      PMTUD: ENABLED
          Administrative Minimum MTU: 512
          Administrative Maximum MTU: none
          Timer 1: 10 minutes
          Timer 2: 2 minutes
          # ICMP TooBigs: 0
          # ICMP TooBigs for unk. connection: 0
          PMTU Increase Attempts: 17
          Black Hole Detect Threshold: 50 retransmissions
      ...
      MTU/MSS Information
          ENABLED on this connection
          MSS in effect: 536
          Calculated MSS to peer: 536
          MSS received from peer: 0
          Application set MSS: 0
          Xmit Interface MSS: 0
          MSS Sent to Peer: 0
          "ICMP DestUn, Frag Req'd and DF Set" messages: 0
          Number of attempts to increase PMTU: 0
          Time to next increase attempt: 0 seconds
          Black Hole Detection State: none
      ...
      Out-of-order Packet Queue Information

        Buffers Outstanding: 25
                 High Water: 28
          Buffers discarded: 15
      ...
      TCP-Paws is disabled

- See show tcp statistics