Monitoring IS-IS

[Contents] [Prev] [Next] [Index] [Report an Error]

Monitoring IS-IS
The CLI has commands available for monitoring IS-IS parameters and CLNS parameters.

Monitoring IS-IS Parameters

You can monitor the IS-IS link state database and IS-IS debug information. Use the commands in this section to:

Display router information.

Display information about SPF calculations.

Monitor IS-IS summary address information.

Display debug information.

Display host.

Display information about MPLS tunnels.

Clear adjacencies.

Display paths to intermediate systems.

You can use the output filtering feature of the show command to include or exclude lines of output based on a text string you specify. Refer to ERX System Basics Configuration Guide, Chapter 2, Command Line Interface, for details.

clear isis adjacency

Use to remove entries from the adjacency database.

Specify a hostname or the system ID of a neighbor to clear only adjacencies with that neighbor.

Specify no options to remove all adjacencies from the database.

Example
host1#clear isis adjacency 
There is no no version.

debug isis

Use to obtain debug-related information about certain parameters.

This command manipulates the same log as the Global Configuration log commands.

You can select from these parameters:

adj-packets - IS-IS adjacency-related packets

mpls traffic-eng advertisements - MPLS traffic-engineering agent advertisements

mpls traffic-eng agents - MPLS traffic-engineering agents

snp-packets - IS-IS CSNP/PSNP packets

spf-events - IS-IS Shortest Path First events

spf-statistics - IS-IS SPF timing and statistic data

spf-triggers - IS-IS SPF triggering events

update-packets - IS-IS update-related packets

Example
host1#debug isis adj-packets
Use the no version to disable debugging display.

show host

Use to display the name-to-NSAP mappings defined with the clns host command.

Example
host1:abc#show host
Static Host Table
-----------------
name   ip address   type   username    password
----   ----------   ----   ---------   --------
jkk    10.10.0.73   ftp    anonymous   null
Clns Host Alias Table
---------------------
name  area address                     system ID         type
----- -------------------------------- ----------------- ------
fred  47.0005.80FF.F800.0000.0001.0001 0000.0000.0011.00 static
karen 47.0005.80FF.F800.0000.0001.0001 0000.0000.0012.00 static
show isis database

Use to display IS-IS link state database information.

Each option (described below) can be entered in an arbitrary string within a single command entry.

Request specific show isis database statistics by selecting from these options:

lspid - link state protocol ID in form xxxx.xxxx.xxxx.yy-zz

detail - detailed link state database information; if this option is not specified, a summary display is provided

l1 - level 1 routing link state database

l2 - level 2 routing link state database

level-1 - level 1 routing link state database

level-2 - level 2 routing link state database

Field descriptions

LSPID - LSP identifier

LSP Seq Num - sequence number for the LSP. Enables other systems to determine if they have received the latest information from source.

LSP Checksum - checksum of the LSP packet

LSP Holdtime - number of seconds that the LSP remains valid

ATT - attach bit; indicates that the system is a level 2 router and can reach other areas

P - P bit; detects whether Intermediate System is capable of area partition repair

OL - overload bit; determines whether Intermediate System is congested

Area Address - area addresses that can be reached from the system

NLPID - ISO network layer protocol identifier

IP Address - IP address of the interface

Hostname - hostname of the system

Router ID - ID configured on the system

Metric - metric that indicates either of the following costs:

cost of adjacency between the originating system and the advertised neighbor

cost between the advertising system and the advertised destination

IPv4 Interface Address - address of the interface

IPv4 Neighbor Address - address of a neighbor

Example 1
host1#show isis database
IS-IS Level-1 Link State Database
LSPID LSP        Seq Num         LSP Checksum LSP Holdtime ATT/P/OL
0000.0000.004E.00-00  0x000013F5   0x8BAA     1198                     0/0/0
0000.0000.3333.00-00* 0x0000020F   0xEA1E     1199             0/0/0
0000.0000.3333.02-00  0x00000007   0x8C30     1199             0/0/0
0000.0000.7500.00-00  0x0000308D   0x5EDF     1198                     0/0/0
0090.1A00.B000.00-00  0x00000011   0xB082     1195             1/0/0
0090.1A00.C000.00-00  0x0000005F   0x9860     1196             0/0/0
IS-IS Level-2 Link State Database
LSPID LSP        Seq Num         LSP Checksum LSP Holdtime ATT/P/OL
0000.0000.004E.00-00  0x00001355   0x0DA7     1198         0/0/0
0000.0000.3333.00-00* 0x00000257   0x566B     1199         0/0/0
0000.0000.3333.02-00  0x00000007   0x8C30     1199         0/0/0
0000.0000.7500.00-00  0x00003315   0x3627     1198         0/0/0
0010.7B36.5FF7.00-00  0x00000BAF   0x187A     1183         0/0/0
0090.1A00.B000.00-00  0x00000016   0xD624     1195         1/0/0
0090.1A00.C000.00-00  0x00000071   0x9358     1196        0/0/0
Example 2
host1#show isis database detail
LSPID LSP        Seq Num         LSP Checksum LSP Holdtime ATT/P/OL
boston.00-00*    0x00000116    0x4760     655    1/0/0
  Area Address: 47.0005.80FF.F800.0000.0000.0004
  NLPID:       0x81 0xcc
  IP Address:  10.1.1.1
  Hostname: boston
  Router ID:  10.1.1.1
  Metric: 10 IS newyork.00
    IPv4 Interface Address:  10.1.1.1
    IPv4 Neighbor Address:   10.1.1.2
  Metric: 10 IS washington.00
    IPv4 Interface Address:  10.1.3.1
    IPv4 Neighbor Address:   10.1.3.3
  Metric: 10 IP 192.168.1.0/24
  Metric: 10 IP 10.1.1.0/24
  Metric: 10 IP 10.1.3.0/24
  Metric: 20 IP 10.1.2.0/24
Example 3
host1#show isis database verbose
IS-IS Level-1 Link State Database
LSPID                 LSP Seq Num  LSP Checksum  LSP Holdtime  ATT/P/OL
zion.00-00*           0x00000011   0xBFAD        487           0/0/0
  Area Address: 47.0005.80FF.F800.0000.0000.0003
  NLPID:       0x81 0xcc
  IP Address:  222.9.1.1
  Hostname: zion
  Router ID:  222.9.1.1
  Metric: 0  ES 2220.0900.1001
  Metric: 10 IS london.00
        Administrative group:  0
        IPv4 Interface Address:  221.1.1.1
        IPv4 Neighbor Address:   221.1.1.2
        Maximum link bandwidth:  50000
        Reservable link bandwidth:  50000
        Unreserved bandwidth:
          Priority 0:  50000
          Priority 1:  50000
          Priority 2:  50000
          Priority 3:  50000
          Priority 4:  30000
          Priority 5:  30000
          Priority 6:  30000
          Priority 7:  30000
        TE default metric:  0
  Metric: 10 IS london.00
        Administrative group:  0
        IPv4 Interface Address:  221.1.6.1
        IPv4 Neighbor Address:   221.1.6.2
        Maximum link bandwidth:  50000
        Reservable link bandwidth:  50000
        Unreserved bandwidth:
          Priority 0:  50000
          Priority 1:  50000
          Priority 2:  50000
          Priority 3:  50000
          Priority 4:  30000
          Priority 5:  30000
          Priority 6:  30000
          Priority 7:  30000
        TE default metric:  0
  Metric: 10 IS paris.00
        Administrative group:  0
        IPv4 Interface Address:  221.1.4.1
        IPv4 Neighbor Address:   221.1.4.4
        Maximum link bandwidth:  0
        Reservable link bandwidth:  0
        Unreserved bandwidth:
          Priority 0:  0
          Priority 1:  0
          Priority 2:  0
          Priority 3:  0
          Priority 4:  0
          Priority 5:  0
          Priority 6:  0
          Priority 7:  0
        TE default metric:  0
  Metric: 10 IP 221.1.1.0/24
  Metric: 10 IP 221.1.6.0/24
  Metric: 10 IP 221.1.4.0/24
  Metric: 0 IP 222.9.1.1/32
show isis mpls adjacency-log

Use to display a log of the last 20 IS-IS adjacency changes.

Field descriptions

When - amount of time since recording the log entry

Neighbor ID - identifier for the neighbor

IP Address - IP address of the neighbor

Interface - interface from which neighbor was learned

Status - adjacency status, Up or Down

Level - IS-IS routing level

Example
host1#show isis mpls adjacency-log
IS-IS MPLS TE log
When      Neighbor ID        IP Address   Interface Status  Level
02:25:47  2220.0900.2002.00  221.1.1.2    at2/0.1   Up      L1
02:25:47  2220.0900.2002.00  221.1.6.2    at2/0.6   Up      L1
02:25:47  2220.0900.4004.00  221.1.4.4    at2/1.5   Up      L1
show isis mpls advertisements

Use to display the last record flooded from MPLS.

Field descriptions

System ID - name or system ID of the MPLS tail-end (destination) router

Router ID - router ID for the system

Link Count - number of links that MPLS advertises

Neighbor System ID - identifier of the remote system in an area

Administrative group - TLV administrative group or color assigned to the link

Interface IP address - IP address of the interface

Neighbor IP Address - IP address of the neighbor

Maximum link bandwidth - bandwidth capacity of the link in bits per second

Reservable link bandwidth - amount of bandwidth reservable on the link (whether reserved or not)

Unreserved bandwidth - amount of bandwidth available for reservation on the link

Affinity Bits - attributes flooded for the link

Example
host1#show isis mpls advertisements
System ID: zion.00
  Router ID:  222.9.1.1
    Link[1]
      Neighbor System ID: london.00
        Administrative group:  0
        IPv4 Interface Address:  221.1.1.1
        IPv4 Neighbor Address:   221.1.1.2
        Maximum link bandwidth:  50000
        Reservable link bandwidth:  50000
        Unreserved bandwidth:
          Priority 0:  50000
          Priority 1:  50000
          Priority 2:  50000
          Priority 3:  50000
          Priority 4:  30000
          Priority 5:  30000
          Priority 6:  30000
          Priority 7:  30000
        TE default metric:  0
    Link[2]
      Neighbor System ID: london.00
        Administrative group:  0
        IPv4 Interface Address:  221.1.6.1
        IPv4 Neighbor Address:   221.1.6.2
        Maximum link bandwidth:  50000
        Reservable link bandwidth:  50000
        Unreserved bandwidth:
          Priority 0:  50000
          Priority 1:  50000
          Priority 2:  50000
          Priority 3:  50000
          Priority 4:  30000
          Priority 5:  30000
          Priority 6:  30000
          Priority 7:  30000
        TE default metric:  0
    Link[3]
      Neighbor System ID: paris.00
        Administrative group:  0
        IPv4 Interface Address:  221.1.4.1
        IPv4 Neighbor Address:   221.1.4.4
        Maximum link bandwidth:  0
        Reservable link bandwidth:  0
        Unreserved bandwidth:
          Priority 0:  0
          Priority 1:  0
          Priority 2:  0
          Priority 3:  0
          Priority 4:  0
          Priority 5:  0
          Priority 6:  0
          Priority 7:  0
        TE default metric:  0
show isis mpls tunnel

Use to display information about tunnels used in the calculation of IS-IS next hops.

Field descriptions

System Id - name or system ID of the MPLS tail-end (destination) router

Tunnel Name - name of the MPLS tunnel interface

Nexthop - destination IP address of the MPLS tunnel

Metric - metric of the MPLS tunnel

Mode - metric mode, either absolute or relative

Example
host1#show isis mpls tunnel
System Id         Tunnel Name   Nexthop    Metric    Mode
dakota-router1.00 Tunnel1       2.2.2.2    -3        Relative
                  Tunnel2       2.2.2.2    11        Absolute
jersey-router2.00 Tunnel3       3.3.3.3    -1        Relative
                  Tunnel4       3.3.3.3 
show isis spf-log

Use to display how often and why the router has run a full SPF calculation.

Field descriptions

When - amount of time since a full SPF calculation took place given in hours:minutes:seconds. The previous 20 calculations are logged.

Duration - number of milliseconds to complete this SPF run. The elapsed time is in actual clock time, not CPU time.

Last Trigger LSP - whenever a full SPF calculation is triggered by a new LSP, the LSP ID is stored in the router

Triggers - list of causes that triggered a full SPF calculation

Example
host1#show isis spf-log
Level 1 SPF log
When     Duration      Last Trigger LSP     Triggers
01:20:29 0.000         0000.0000.3333.00-00 LSP Add
01:19:47 0.000         0000.0000.3333.00-00 LSP Sequence Update
01:19:42 0.000         0000.0000.3333.00-00 LSP Sequence Update
01:19:37 0.000         0000.0000.3333.00-00 LSP Sequence Update
00:59:40 0.000         0000.0000.3333.00-00 LSP Sequence Update
00:39:42 0.000         0000.0000.3333.00-00 LSP Sequence Update
00:19:44 0.000         0000.0000.3333.00-00 LSP Sequence Update
00:03:37 0.000         0000.0000.7500.00-00 LSP Contents Changed
 
Level 2 SPF log
When     Duration      Last Trigger LSP     Triggers
01:20:29 0.000         0000.0000.3333.00-00 LSP Add
01:19:47 0.000         0000.0000.3333.00-00 LSP Sequence Update
01:19:42 0.000         0000.0000.3333.00-00 LSP Sequence Update
01:19:37 0.000         0000.0000.3333.00-00 LSP Sequence Update
01:19:32 0.000         0000.0000.3333.00-00 LSP Sequence Update
00:59:34 0.000         0000.0000.3333.00-00 LSP Sequence Update
00:39:36 0.000         0000.0000.3333.00-00 LSP Sequence Update
00:19:38 0.000         0000.0000.3333.00-00 LSP Sequence Update
00:03:37 0.000         0000.0000.7500.00-00 LSP Contents Changed
00:03:32 0.000         0000.0000.7500.00-00 LSP Contents Changed
00:02:35 0.000         0000.0000.7500.00-00 LSP Contents Changed
00:02:30 0.000         0000.0000.7500.00-00 LSP Contents Changed
00:02:25 0.000         0090.1A00.C000.00-00 LSP Contents Changed
show isis summary-addresses

Use to display the status of IS-IS aggregate addresses.

Field descriptions

Address - aggregate addresses advertised by summarization process

Mask - IP subnet masks used for the summary routes

Level - level for which multiple groups of addresses can be summarized

Metric - metric used to advertise the summary

State - state of the summary address

Example
host1#show isis summary-addresses
Address       Mask         Level       Metric   State
--------      ----------   ---------   ------   -------
3.0.0.0       255.0.0.0    LEVEL-1     0        ENABLED
4.0.0.0       255.0.0.0    LEVEL-1-2   5        ENABLED
show isis topology

Use to display the paths to all intermediate systems or specific types of intermediate systems.

Field descriptions

System ID - name or system ID of the intermediate system

Metric - metric of the path to the intermediate system

Nexthop - destination IP address of the intermediate system

Interface - interface from which neighbor was learned

SNPA - subnetwork point of attachment; for a LAN circuit, it is the MAC address; not meaningful for a point-to-point circuit.

Example
host1#show isis topology level-1
              IS-IS paths for level-1 routers
              -------------------------------
  System-ID   Metric    Next Hop       Intf      SNPA
------------- ------   -------------  --------   ----
barcelona:vr2  10      barcelona:vr2  at2/0.12
undebug isis

Use to cancel the display of information about a selected event.

The same IS-IS variables can be designated as in the debug isis command.

Example
host1#undebug isis adj-packets
There is no no version.

Displaying CLNS

You can display the following information related to the CLNS protocol:

CLNS information about interfaces

Information about router adjacencies

Information about ES and IS neighbors

Protocol-specific information for each routing process

Information about CLNS packets

Global CLNS configurations

You can set a statistics baseline for CLNS using the baseline clns command.

baseline clns

Use to set a statistics baseline for CLNS.

The system 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 optional interface-specifier parameter to specify an interface, otherwise the command sets a baseline for all interfaces.

You cannot set a baseline for groups of interfaces.

When baselining is requested, the time since the last baseline was set is displayed in days, hours, minutes, and seconds.

Use the optional delta keyword with the show clns traffic command to specify that baselined statistics are to be shown.

There is no no version.

Example
host1#show clns traffic detail
IS-IS: Baseline last set 0 days, 0 hours, 1 minutes, 41 seconds
IS-IS: Corrupted LSPs: 0
IS-IS: L1 LSP Database Overloads: 0
IS-IS: L2 LSP Database Overloads: 0
IS-IS: Area Addresses Dropped: 0
IS-IS: Attempts to Exceed Max Sequence: 0
IS-IS: Sequence Numbers Skipped: 6
IS-IS: Own LSPs Purged: 1
IS-IS: System ID Length Mismatches: 0
IS-IS: Maximum Area Mismatches: 0
Interface: atm2/1.3
IS-IS: Baseline last set 0 days, 0 hours, 1 minutes, 43 seconds
IS-IS: Protocol PDUs (in/out): 32/36
IS-IS: Init Failures: 0
IS-IS: Adjacencies Changes: 1
IS-IS: Adjacencies Rejected: 0
IS-IS: Bad LSPs: 0
IS-IS: Level-1 Designated IS Changes: 0
IS-IS: Level-2 Designated IS Changes: 0 
IS-IS: Invalid 9542s: 0
host1#baseline clns atm 2/1.3
host1#show clns traffic detail delta
IS-IS: Baseline last set 0 days, 0 hours, 2 minutes, 27 seconds
IS-IS: Corrupted LSPs: 0
IS-IS: L1 LSP Database Overloads: 0
IS-IS: L2 LSP Database Overloads: 0
IS-IS: Area Addresses Dropped: 0
IS-IS: Attempts to Exceed Max Sequence: 0
IS-IS: Sequence Numbers Skipped: 6
IS-IS: Own LSPs Purged: 1
IS-IS: System ID Length Mismatches: 0
IS-IS: Maximum Area Mismatches: 0
Interface: atm2/1.3
IS-IS: Baseline last set 0 days, 0 hours, 0 minutes, 8 seconds
IS-IS: Protocol PDUs (in/out): 2/1
IS-IS: Init Failures: 0
IS-IS: Adjacencies Changes: 0
IS-IS: Adjacencies Rejected: 0
IS-IS: Bad LSPs: 0
IS-IS: Level-1 Designated IS Changes: 0
IS-IS: Level-2 Designated IS Changes: 0
IS-IS: Invalid 9542s: 0
clear isis database

Use to delete all entries from the IS-IS link state database, or only the entries associated with the specified neighbor.

There is no no version.

Example
host1#show isis database
IS-IS Level-1 Link State Database
LSPID          LSP Seq Num  LSP Checksum  LSP Holdtime  ATT/P/OL
rtr1.00-00*    0x00000009   0x568F        1188          0/0/0
rtrtwo.00-00   0x00000005   0xEC9B        444           0/0/0
IS-IS Level-2 Link State Database
LSPID          LSP Seq Num  LSP Checksum  LSP Holdtime  ATT/P/OL
rtr1.00-00*    0x00000010   0xF630        1193          0/0/0
rtrtwo.00-00   0x0000000C   0xF8DA        1188          0/0/0
host1#clear isis database
host1#show isis database
IS-IS Level-1 Link State Database
LSPID          LSP Seq Num  LSP Checksum  LSP Holdtime  ATT/P/OL
IS-IS Level-2 Link State Database
LSPID          LSP Seq Num  LSP Checksum  LSP Holdtime  ATT/P/OL
show clns

Use to display global CLNS information about the router.

Field descriptions

Interfaces Enabled for CLNS - number of interfaces that have the CLNS routing protocol enabled

Configuration Timer - interval (in seconds) after which the router sends out IS hello packets

Default Holding Timer - length of time (in seconds) that hello packets are remembered

Packet Lifetime - default value used in packets sourced by this router

Intermediate system operation enabled (forwarding allowed) - Indicates whether this router is configured to be an ES or an IS

IS-IS Level-1-2 Router - shows whether IS-IS is running in this router, gives tag information, and shows whether it is running level 1 or level 1-2

Routing for Area - ISO (NSAP) address for the network

Distribute domain wide enabled - indicates whether distribute-domain-wide is enabled

Area Authentication - if area authentication is enabled, lists key-id, type of authentication, start and stop accept times, and start and stop generate times for the key. An asterisk after the type indicates that the key is active.

Domain Authentication - if domain authentication is enabled, lists key-id, type of authentication, start and stop accept times, and start and stop generate times for the key. An asterisk after the type indicates that the key is active.

Use the es-neighbors keyword to display information for IS-IS end-system adjacencies or the is-neighbors keyword to display information for IS-IS intermediate-system adjacencies. Neighbor entries are sorted according to the area in which they are located. The following fields are displayed when any of these keywords is used:

System Id - six-byte value of system

Interface - interface on which the router was discovered

State - adjacency state, either up or Init

Up - believes that the ES or IS is reachable

Init - system is an IS and is waiting for an IS-IS hello message. IS-IS regards the neighbor as not adjacent.

Type - level 1, level 2, and level 1-2 type adjacencies

L1 - router adjacency for level 1 routing only

L1L2 - router adjacency for level 1 and level 2 routing

L2 - router adjacency for level 2 only

Priority - IS-IS priority that the respective neighbor is advertising. The highest-priority neighbor becomes the designated IS-IS router for the interface.

Circuit Id - neighbor's idea of what the designated IS-IS router is for the interface

Add the detail keyword to display area addresses and IP addresses.

Example 1
host1#show clns
Global CLNS Information:
  3 Interfaces Enabled for CLNS
  NET: 47.0005.80FF.F800.0000.0001.0001.0000.0000.3333.00
  Configuration Timer: 10, Default Holding Timer: 30, Packet Lifetime: 1200
  Intermediate system operation enabled
  IS-IS level-1-2 Router: testnet
    Routing for Area: 47.0005.80FF.F800.0000.0001.0001
  Distribution domain wide enabled
  Area Authentication:
    Key-id:   1 Type: hmac-md5
      Start Accept:   FRI JAN 14 09:57:41 2000
      Start Generate: FRI JAN 14 09:59:41 2000
      Stop Accept:    0
      Stop Generate:  0
  Domain Authentication:
    Key-id:   1 Type: hmac-md5*
      Start Accept:   WED JAN 12 19:01:52 2000
      Start Generate: WED JAN 12 19:03:52 2000
      Stop Accept:    0
      Stop Generate:  0
Example 2
host1#show clns is-neighbors
System Id      Interface   State  Type Priority  Circuit Id
0000.0000.7500 atm2/0.111    up     L1L2 127        0000.0000.0000.00
host1#show clns is-neighbors detail
System Id      Interface  State Type Priority  Circuit Id
0000.0000.7500 atm2/0.111 up    L1L2 127       0000.0000.0000.00
  Area Address(es): 47.0005.80FF.F800.0000.0001.0001
  Ip Address(es):   172.30.245.33
show clns interface

Use to display CLNS-specific information about each interface.

Field descriptions

interface - shows status of interface

Checksums - can be either enabled or disabled

MTU - shows the maximum transmission size for a packet on this interface

Encapsulation - describes encapsulation used by CLNP packets on this interface

Next ESH/ISH - shows when the next ES hello or IS hello is sent on this interface

Routing Protocol - lists the area(s) that this interface is in. In most cases, an interface will be in only one area.

Circuit type - indicates whether the interface has been configured for local routing (level 1), area routing (level 2), or local and area routing (level 1-2)

Authentication Level-1 - if area authentication is enabled, lists key-id, type of authentication, start and stop accept times, and start and stop generate times for the key. An asterisk after the type indicates the key is active.

Authentication Level-2 - if domain authentication is enabled, lists key-id, type of authentication, start and stop accept times, and start and stop generate times for the key. An asterisk after the type indicates the key is active.

Remaining fields - display information about ISO CLNS routing protocols enabled on the interface. For IS-IS, specifies the level 1 and level 2 metrics, priorities, interface IDs, next IS-IS hello interval, mesh group status, and number of active level 1 and level 2 adjacencies.

Example
host1#show clns interface
fastEthernet0/0 is up, line protocol is down
  Checksums Enabled, MTU 1500, Encapsulation SNAP
  Next ESH/ISH is 1 seconds
  Routing Protocol: IS-IS
    Circuit Type: level-1-2
    Interface number 0x1, local circuit ID 0x1
    Level-1 Metric: 10, Priority: 0, Circuit ID: 0000.0000.0000.01
    Number of active level-1 adjacencies: 0
    Level-2 Metric: 10, Priority: 0, Circuit ID: 0000.0000.0000.01
    Number of active level-2 adjacencies: 0
    Next IS-IS LAN Level-1 Hello in 0 seconds
    Next IS-IS LAN Level-2 Hello in 0 seconds
    Mesh Group Inactive
serial3/1:1/1.111 is up, line protocol is up
  Checksums Enabled, MTU 1600, Encapsulation Frame Relay
  Next ESH/ISH is 8 seconds
  Routing Protocol: IS-IS
    Circuit Type: level-1-2
    Interface number 0x2, local circuit ID 0x2
    Level-1 Metric: 10, Priority: 0, Circuit ID: 0000.0000.0000.02
    Number of active level-1 adjacencies: 0
    Level-2 Metric: 10, Priority: 0, Circuit ID: 0000.0000.0000.02
    Number of active level-2 adjacencies: 0
    Next IS-IS PTPT Hello in 3 seconds
    Mesh Group Inactive
    Authentication Level-1:
      Key-id:   1 Type: hmac-md5*
        Start Accept:   WED JAN 12 18:56:20 2000
        Start Generate: WED JAN 12 18:58:20 2000
        Stop Accept:    0
        Stop Generate:  0
    Authentication Level-2:
      Key-id:   1 Type: hmac-md5
        Start Accept:   FRI JAN 14 09:58:27 2000
        Start Generate: FRI JAN 14 10:00:27 2000
        Stop Accept:    0
        Stop Generate:  0
host1#show clns interface
atm2/0.111 is up, line protocol is up
  Checksums Enabled, MTU 4470, Encapsulation ATM
  Next ESH/ISH is 2 seconds
  Routing Protocol: IS-IS
    Circuit Type: level-1-2
    Interface number 0x1, local circuit ID 0x1
    Level-1 Metric: 10, Priority: 0, Circuit ID:0000.0000.7500.07
    Number of active level-1 adjacencies: 1
    Level-2 Metric: 10, Priority: 0, Circuit ID:0000.0000.0000.01
    Number of active level-2 adjacencies: 1
    Next IS-IS PTPT Hello in 7 seconds
    Mesh Group Inactive
ethernet6/0 is up, line protocol is up
  Checksums Enabled, MTU 1500, Encapsulation SNAP
  Next ESH/ISH is 8 seconds
  Routing Protocol: IS-IS
    Circuit Type: level-1-2
    Interface number 0x2, local circuit ID 0x2
    Level-1 Metric: 10, Priority: 0, Circuit ID:0000.0000.3333.02
    Number of active level-1 adjacencies: 1
    Level-2 Metric: 10, Priority: 0, Circuit ID:0000.0000.3333.02
    Number of active level-2 adjacencies: 1
    Next IS-IS LAN Level-1 Hello in 1 seconds
    Next IS-IS LAN Level-2 Hello in 3 seconds
    Mesh Group Inactive
show clns neighbors

Use to display information about ES and IS neighbors.

Field descriptions

System Id - six-byte value of system

SNPA - subnetwork point of attachment; the data link address

Interface - interface the system was learned from

State - state of the ES or IS

Init - system is an IS and is waiting for an IS-IS hello message. IS-IS regards the neighbor as not adjacent.

Up - believes the ES or IS is reachable

Holdtime - number of seconds before this adjacency entry times out

Type - adjacency type. Possible values are as follows:

ES - end-system adjacency either discovered via the ES-IS protocol or statically configured

IS - router adjacency either discovered via the ES-IS protocol or statically configured

L1 - router adjacency for level 1 routing only

L1L2 - router adjacency for level 1 and level 2 routing

L2 - router adjacency for level 2 only

Protocol - protocol through which the adjacency was learned. Valid protocol sources include ES-IS, IS-IS, and Static.

Add keyword detail to display area addresses and IP addresses.

Example
host1#show clns neighbors detail
System Id        SNPA Interface   State  Holdtime  Type Protocol
0000.0000.7500      atm2/0.111                   up     30                L1L2     IS-IS
  Area Address(es): 47.0005.80FF.F800.0000.0001.0001
  Ip Address(es):   172.30.245.33
show clns protocol

Use to display protocol-specific information about a routing process.

Field descriptions

IS-IS Router - IS-IS router name

System ID - six-byte value of system

IS-Type - indicates the routing level (level 1, level 2, or both) that is enabled on the router

Manual area addresses - configured area addresses

Routing for area address(es) - identified for level 1 routing processes. For level 2 routing processes, lists the domain address.

Interfaces supported by IS-IS - lists interfaces and type

Distance - configured distance value

Redistributing - protocols being redistributed into IS-IS

Example
host1#show clns protocol
IS-IS Router:testnet
  System Id: 0000.0000.3333.00  IS-Type: level-1-2
  Manual area address(es):47.0005.80FF.F800.0000.0001.0001
  Routing for area address(es):47.0005.80FF.F800.0000.0001.0001
  Interfaces supported by IS-IS:atm2/0.111 - IP
  Distance: 115
  Redistributing: 
show clns traffic

Use to display all CLNS packets the router sees.

Use the optional delta keyword to specify that baselined statistics are to be shown.

Field descriptions

IS-IS: Baseline last set - time since the baseline was set

IS-IS: Corrupted LSPs - number of LSPs received with errors

IS-IS: L1 LSP Database Overloads - number of overloads in level 1

IS-IS: L2 LSP Database Overloads - number of overloads in level 2

IS-IS: Area Addresses Dropped - number of area addresses that the system dropped

IS-IS: Attempts to Exceed Max Sequence - number of sequence wraps over maximum

IS-IS: Sequence Numbers Skipped - number of LSPs received out of order

IS-IS: Own LSPs Purged - number of LSPs deleted

IS-IS: System ID Length Mismatches - number of unmatched system ID lengths

IS-IS: Maximum Area Mismatches - number of rejected hellos due to area mismatches

IS-IS: Area/Domain Authentication Failures - number of authentication failures on received level 1 and level 2 LSP/SNPs

When you specify an interface, reports include the following additional field descriptions:

IS-IS: Protocol PDUs (in/out) - number of packets in/out on interface

IS-IS: Init Failures - number of rejected hellos on interface

IS-IS: Adjacencies Changes - number of times adjacencies have transitioned from down to up

IS-IS: Adjacencies Rejected - number of times hellos are rejected because of an incompatibility

IS-IS: Bad LSPs - number of LSPs received with errors

IS-IS: Level-1 Designated IS Changes - number of times the level 1 designated router has changed

IS-IS: Level-2 Designated IS Changes - number of times the level 2 designated router has changed

IS-IS: Invalid 9542s - number of rejected ES hello packets

IS-IS: Authentication Failures - number of authentication failures on received level 1 and level 2 hello packets

IS-IS: Interface - IS-IS interface for which details are displayed

Add the detail keyword to show data for all interfaces.

Example
host1#show clns traffic
IS-IS: Baseline last set 0 days, 21 hours, 12 minutes, 15 seconds
IS-IS: Corrupted LSPs: 0
IS-IS: L1 LSP Database Overloads: 0
IS-IS: L2 LSP Database Overloads: 0
IS-IS: Area Addresses Dropped: 0
IS-IS: Attempts to Exceed Max Sequence: 0
IS-IS: Sequence Numbers Skipped: 5
IS-IS: Own LSPs Purged: 0
IS-IS: System ID Length Mismatches: 0
IS-IS: Maximum Area Mismatches: 0
IS-IS: Area/Domain Authentication Failures: 0
host1#show clns traffic detail
IS-IS: Baseline last set 0 days, 21 hours, 12 minutes, 40 seconds
IS-IS: Corrupted LSPs: 0
IS-IS: L1 LSP Database Overloads: 0
IS-IS: L2 LSP Database Overloads: 0
IS-IS: Area Addresses Dropped: 0
IS-IS: Attempts to Exceed Max Sequence: 0
IS-IS: Sequence Numbers Skipped: 5
IS-IS: Own LSPs Purged: 0
IS-IS: System ID Length Mismatches: 0
IS-IS: Maximum Area Mismatches: 0
IS-IS: Area/Domain Authentication Failures: 0
Interface: fastEthernet0/0
IS-IS: Baseline last set 0 days, 21 hours, 12 minutes, 40 seconds
IS-IS: Protocol PDUs (in/out): 62005/66617
IS-IS: Init Failures: 0
IS-IS: Adjacencies Changes: 2
IS-IS: Adjacencies Rejected: 0
IS-IS: Bad LSPs: 0
IS-IS: Level-1 Designated IS Changes: 2
IS-IS: Level-2 Designated IS Changes: 2
IS-IS: Invalid 9542s: 0
IS-IS: Authentication Failures: 0
Interface: serial3/2:1/1.222
IS-IS: Baseline last set 0 days, 21 hours, 12 minutes, 40 seconds
IS-IS: Protocol PDUs (in/out): 10422/9522
IS-IS: Init Failures: 0
IS-IS: Adjacencies Changes: 1
IS-IS: Adjacencies Rejected: 0
IS-IS: Bad LSPs: 0
IS-IS: Level-1 Designated IS Changes: 0
IS-IS: Level-2 Designated IS Changes: 0
IS-IS: Invalid 9542s: 0
IS-IS: Authentication Failures: 0 

[Contents] [Prev] [Next] [Index] [Report an Error]