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Monitoring DVMRP

You can establish a reference point for DVMRP statistics by setting the statistics counters to zero.

You can display DVMRP information with the show ip dvmrp commands.

baseline ip dvmrp

Use to set the counters for DVMRP statistics to zero, which establishes a reference point, or baseline, for DVMRP statistics.
Example (host1)#baseline ip dvmrp
There is no no version.
See baseline ip dvmrp.

show ip dvmrp

Use to display DVMRP information for a VR.
Field descriptions
- Dvmrp Administrative State—State of DVMRP in the software: Enabled or Disabled
- Mcast Administrative State—State of multicasting in the software: Enabled or Disabled
- Dvmrp Version—Version of DVMRP with which this software is compatible
- GenerationID—A number the router generates each time it reboots; when the number changes, neighbors discard all information previously learned from the router
- Number of Routes—Number of routes in the DVMRP routing table
- Number of Triggered Routes—Number of routes waiting to be advertised, because a parameter for the route changed
- Reachable Routes—Number of routes that the router can currently reach
- Route-hog-notification—Number of DVMRP routes that the router can record before it generates a system log warning message
- Route-limit—Maximum number of routes that the router can advertise on each interface
- Send-S32-Prunes-Only—Indicator of whether the router sends only S-32 prunes
  - true—Router sends only S-32 prunes and grafts to ensure compatibility with other protocols, such as PIM
  - false—Router sends S-32 and S/Prefix grafts and prunes

Example

host1:boston>show ip dvmrp
Routing Process DVMRP - Distance Vector Multicast Routing Protocol
  Dvmrp Administrative State:         Enabled
  Multicast Administrative State:     Enabled
  Dvmrp Version:                      3.255
  Generation ID:                      0x46828e2b
  Number of Routes:                   2
  Number of Triggered Routes:         0
  Reachable Routes:                   2
  route-hog-notification:             10000
  route-limit:                        7000
  Send-S32-Prunes-Only:               true
  unicastRoutingOnly:                 false
  Graceful Restart Duration:          60
  Graceful Restart is:                complete (timer 0 seconds)
  Redistribution                      None Configured
  dynamic-redistribution:             enabled

See show ip dvmrp.

show ip dvmrp interface

Use to display DVMRP parameters for the specified interfaces.
Field descriptions
- Interface—Type and specifier of the interface connected to a source. For details about interface types and specifiers, see Interface Types and Specifiers.
- SourceAddress—IP address of the interface or, for an unnumbered interface, address of the loopback interface
- Network/Mask—Network and mask of the subnet on which the interface resides
- Received Bad Packets/RBdPk—Number of bad packets received on this interface
- Received Bad Routes/RBdRt—Number of bad routes received on this interface
- Routes Sent/SntRt—Number of bad routes advertised on this interface
- Administrative State—Configured state of DVMRP on this interface: enabled or Disabled
- Summary Address(es)—Specific summary address or addresses that this interface should advertise
- auto-summary—Status of automatic summarization: Enabled or Disabled
- metric-offset in—Number of hops by which the router increases a DVMRP route advertised in incoming DVMRP reports
- metric-offset out—Number of hops by which the router increases a DVMRP route advertised in outgoing DVMRP reports
- announce-filter—Routes advertised by the interface
- accept-filter(s)—Names of IP access lists that specify the sources for which the interface accepts routes

Example 1

host1:v3#show ip dvmrp interface
Interface: ATM2/0.1
      SourceAddress:                       1.0.0.1
      Network/Mask:                     1.0.0.1/24
      Received Bad Packets:                      0
      Received Bad Routes:                       0
      Routes Sent:                               0
      Administrative State:                Enabled
      Summary Address(es)          None Configured
      auto-summary:                        Disabed
      metric-offset in:                          1
      metric-offset out:                         0
      announce-filter:                        None
      accept-filter(s)             None Configured

Example 2

host1:boston#show ip dvmrp interface brief
  Interface          SourceAddress   Network/Mask    RBdPk RBdRt SntRt
  atm5/0.14          14.0.1.1        14.0.1.1/8         0     0     2
  atm5/0.15          15.0.1.1        15.0.1.1/8         0     0     2

See show ip dvmrp interface.

show ip dvmrp mroute

Use to display information about DVMRP routes to multicast groups.
Field descriptions
- (S,G) pair—Source, Group pair value
- Uptime—Time, in seconds, that this (S, G) pair entry has been in the routing table
- Upstream Prune—Whether the router has sent prune messages for this group
- RPF Interface—Interface that provides the shortest path back to the source
- Outgoing interface list—Types and specifiers of interfaces through which the VR forwards DVMRP messages, such as atm3/0. For details about interface types and specifiers, see Interface Types and Specifiers.

Example

host1:boston#show ip dvmrp mroute
IP DVMRP Multicast Routing Table
(40.0.0.0/16,  228.1.1.1)  Uptime: 77
  Upstream Prune: none
  RPF Interface
      atm5/0.40
  Outgoing interface list:
      atm5/0.31

See show ip dvmrp mroute.

show ip dvmrp neighbor

Use to display information about DVMRP neighbors.
Specify the brief keyword to view a summary of information.
Field descriptions
- Neighbor Address/NbrAddress—IP address of the neighbor
- Interface—Interface type and specifier, such as atm3/0. For details about interface types and specifiers, see Interface Types and Specifiers.
- Neighbor upTime/UpTime—Length of time, in seconds, that this router has been a neighbor
- Neighbor Major Version/Maj—Major number of the DVMRP version on the neighbor
- Neighbor Minor Version/Min—Minor number of the DVMRP version on the neighbor
- Neighbor Capabilities/Cap—Capability of the neighbor
  - Prune/P—Ability to send prune messages
  - GenerationId/G—Ability to create a generation ID number
  - Mtrace/M—Ability to trace multicast routes
  - Netmask/N—Ability to send prunes and grafts with a network mask address
- Neighbor State/State—Status of communications with the neighbor
  - Active—Router is able to communicate with this neighbor
  - Down—Neighbor is down
  - Ignoring—Router is not accepting messages from this neighbor
  - Oneway—Router is receiving messages from the neighbor, but the neighbor does not include the router's IP address in the messages. This state can indicate a starting transition, or a problem.
- Generation ID—Number that the neighbor generates each time it boots; when the number changes, the VR discards all information previously learned from the router.
- Routes Received—Number of routes received from this neighbor
- Bad Routes Received—Number of bad routes received from this neighbor
- Bad Packets Received—Number of bad packets received from this neighbor

Example 1

host1:boston# show ip dvmrp neighbor
Neighbor Address:                   14.0.0.1
      Interface:                    atm5/0.14
      Neighbor upTime:                28
      Neighbor Major Version:          3
      Neighbor Minor Version:        255
      Neighbor Capabilities:  Prune  GenerationId  Mtrace  NetMask
      Neighbor State:             Active
      Geneneration ID:        0x3a13fbc2
      Routes Received:                 1
      Bad Routes Received              0
      Bad Packets Received:            0

Example 2

host1:v3#show ip dvmrp neighbor brief
  Interface          NbrAddress      UpTime Maj Min Cap   State
  atm5/0.14          14.0.0.1            32   3 255 PGMN  Active
  atm5/0.15          15.0.0.1            34   3 255 PGMN  Active

See show ip dvmrp neighbor.

show ip dvmrp route

Use to display information about DVMRP routes.
Specify an IP address to display the best route to that address.
Specify an IP address and subnet mask to display the route that exactly matches this IP address and subnet mask
Specify an interface type and specifier to display routes associated with that interface. For details about interface types and specifiers, see Interface Types and Specifiers.
Specify the brief keyword to view a summary of information.
Field descriptions
- Prefix—IP address of the network
- Length—Length of the subnet mask for the network
- usNbr/Owner—IP address of the upstream neighbor associated with this route or a description of the origin of the route
  - Dvmrp Local—Route is associated with a directly attached network
  - Dvmrp Aggregate—Route is an aggregate route determined by summarization
- Metric—Metric associated with this interface for this route
- ExpireTime—Time, in seconds, until the VR starts the process for removing the route
- UpTime—Length of time, in seconds, that the route has been in the DVMRP routing table
- Interface—Type and specifier for the interface, such as atm3/0.

Example 1

host1:boston>show ip dvmrp route 
Prefix/Length        usNbr/Owner       Metric ExpireTime UpTime Interface
  14.0.0.0/8         Dvmrp Local          1      Never     18   atm5/0.14
    Downstream Interface(s)
        Interface
        atm5/0.15
  15.0.0.0/8         Dvmrp Local          1      Never     18   atm5/0.15
    Downstream Interface(s)
        None
  25.0.0.0/8         14.0.0.1             2        129     11   atm5/0.14
    Downstream Interface(s)
        Interface
        atm5/0.15

Example 2

host1:v3# show ip dvmrp route brief
  Prefix/Length      usNbr/Owner       Metric ExpireTime UpTime Interface
  14.0.0.0/8         Dvmrp Local          1      Never     26   atm5/0.14
  15.0.0.0/8         Dvmrp Local          1      Never     26   atm5/0.15
  25.0.0.0/8         14.0.0.1             2        121     19   atm5/0.14

See show ip dvmrp route.

show ip dvmrp routeNextHop

Use to display information about the next hop.
Field descriptions
- addr—IP address of the next-hop router
- mlen—Mask length of the next-hop router
- ifIndex—SNMP interface index for the interface that connects to the next hop
- Type—Description of the next-hop router
  - leaf—Neighbor with no downstream neighbors
  - branch—Neighbor with downstream neighbors

Example

host1:boston>show ip dvmrp routeNextHop
  addr/mlen          ifIndex  Type
  172.16.0.0/16            4  leaf
  172.17.0.0/16            4  leaf
  172.18.0.0/16            3  leaf
  172.19.0.0/16            3  leaf
  172.19.0.0/16            4  branch

See show ip dvmrp routeNextHop.

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