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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.
Display information about the settings for IS-IS graceful restart.

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. See JUNOSe System Basics Configuration Guide, 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.
Examplehost1#clear isis adjacency
There is no no version.
See clear isis adjacency

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
Examplehost1#debug isis adj-packets
Use the no version to disable debugging display.
See debug isis

show hosts

Use to display the name-to-NSAP mappings defined with the clns host command.
Field descriptions
- Static Host Table
  - name—Name assigned to the host
  - ip address—Host IP address
  - type—Type of host
  - username—Username necessary to access the host
  - password—Password necessary to access the host
- Clns Host Alias Table
  - name—Name of the host alias
  - area address—Area address of the host alias
  - system ID—Six-byte value of the host alias
  - type—Type of host alias

Example

host1:abc#show hosts
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

See show hosts

show isis database

Use to display IS-IS link-state database information.
Request specific show isis database statistics by selecting from these options:
- lspid—Link-state protocol ID in form xxxx.xxxx.xxxx.yy-zz
- hostname—Link-state database information for the specified hostname
- 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
Each option can be entered in an arbitrary string within a single command entry.
Field descriptions
- LSPID—LSP identifier
- LSP Seq Num—Sequence number for the LSP. Enables other routers 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 router 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 router
- NLPID—ISO network layer protocol identifier
- IP Address—IP address of the interface
- Hostname—Hostname of the router
- Router ID—ID configured on the router
- Metric —Metric that indicates either of the following costs:
  - Cost of adjacency between the originating router and the advertised neighbor
  - Cost between the advertising router and the advertised destination
- IPv4 Interface Address—Address of the interface
- IPv4 Neighbor Address—Address of a 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
- TE default metric—Traffic engineering default metric value
- Tag value(s)—Route tag assigned to the IS-IS interface, if configured

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*0x000001160x4760 6551/0/0
  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  tag value(s):   11
  Metric: 10 IP 10.1.3.0/24
  Metric: 20 IP 10.1.2.0/24  tag value(s):   22

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

Example 4

host1#show isis database Getafix:v2
IS-IS Level-1 Link State Database
LSPID                 LSP Seq Num  LSP Checksum  LSP Holdtime  ATT/P/OL
Getafix:v2.00-00*     0x00000001   0xEB53        1097          0/0/0

IS-IS Level-2 Link State Database
LSPID                 LSP Seq Num  LSP Checksum  LSP Holdtime  ATT/P/OL
Getafix:v2.00-00*     0x00000001   0x456D        1097          0/0/0

Example 5

host1#show isis database Getafix:v2 detail
IS-IS Level-1 Link State Database
LSPID                 LSP Seq Num  LSP Checksum  LSP Holdtime  ATT/P/OL
Getafix:v2.00-00*     0x00000001   0xEB53        967           0/0/0
  Area Address: 22
  NLPID:       0x81 0xcc
  IP Address:  1.1.1.2
  Hostname: Getafix:v2
  Metric: 10 IS Getafix:v2.01
  Metric: 0  ES Getafix:v2
  Metric: 10 IP 1.1.1.0 255.255.255.0

IS-IS Level-2 Link State Database
LSPID                 LSP Seq Num  LSP Checksum  LSP Holdtime  ATT/P/OL
Getafix:v2.00-00*     0x00000001   0x456D        967           0/0/0
  Area Address: 22
  NLPID:       0x81 0xcc
  IP Address:  1.1.1.2
  Hostname: Getafix:v2
  Metric: 10 IS Getafix:v2.01
  Metric: 10 IP 1.1.1.0 255.255.255.0

Example 6—For IS-IS IPv6 configuration

host1:2#show isis database detail
IS-IS Level-1 Link State Database
LSPID                 LSP Seq Num  LSP Checksum  LSP Holdtime  ATT/P/OL
host1:1.00-00          0x00000005   0x0E39        930           0/0/0
  Area Address: 49.0001
  NLPID:       0x81 0xcc
  IP Address:  4.4.4.1
  Hostname: host1:1
  Metric: 0  ES host1:1
  Metric: 10 IS host1:2.00
  Metric: 10 IS host1:2.00
  Metric: 10 IP 4.4.4.0/24
  Metric: 10 IP 20.0.0.0/24
  Metric: 10 IPv6 Internal Up 1:1:1:101::/64
host1:2.00-00*         0x00000004   0xC558        735           0/0/0
  Area Address: 49.0001
  NLPID:       0x81 0xcc
  IP Address:  9.9.9.9
  Hostname: host1:2
  Metric: 0  ES host1:2
  Metric: 10 IS host1:1.00
  Metric: 10 IS host1:3.00
  Metric: 10 IS host1:1.00
  Metric: 10 IS host1:3.00
  Metric: 10 IP 4.4.4.0/24
  Metric: 10 IP 20.0.0.0/24
  Metric: 10 IP 40.0.0.0/24
  Metric: 10 IP 30.0.0.0/24
  Metric: 10 IPv6 Internal Up 1:1:1:102::/64

See show isis database

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

See show isis mpls adjacency-log

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 router
- 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
- TE default metric—Traffic engineering default metric value
- 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

See show isis mpls advertisements

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

See show isis mpls tunnel

show isis nsf

Use to display information about the configured and operational settings on the router for IS-IS graceful restart, which is also known as nonstop forwarding (NSF).
Field descriptions
- Configured Timer Values—Displays the following values configured for IS-IS graceful restart on the router, as described in Configuring Graceful Restart :
  - Graceful Restart—Setting for IS-IS graceful restart on the router: Enabled or Disabled
  - T3 Timer—Method by which the restarting router obtains the T3 wait time: Manual or Derive from adjacency
  - T3 Timeout Value—Maximum time, in seconds, that the restarting router waits before setting the overload bit to indicate that IS-IS graceful restart has failed
  - T2 Timeout Value—Maximum time for IS-IS level 1 routing and level 2 routing, in seconds, that the restarting router waits for the LSP database to synchronize
  - T1 Timeout Value—Time interval, in seconds, between IS-IS restart requests sent by the restarting router on this interface to neighboring routers
  - T1 Retry Count—Number of times the restarting router resends unacknowledged restart requests on this interface at the specified interval
  - Adj. Wait Time—Maximum time, in seconds, that an IS-IS process on the restarting router waits for all interfaces with IS-IS adjacencies to come up before completing the restart process
- Operation Timer Values—Displays the following currently remaining timer settings, in seconds, for IS-IS graceful restart during the restart process:
  - T3 Timer—Remaining time before the restarting router sets the overload bit to indicate that graceful restart has failed
  - T2 Timeout Value—Remaining time for level 1 routing and level 2 routing that the restarting router waits for the LSP database to synchronize
  - Adj. Wait Time—Remaining time that the restarting router waits for all adjacencies to come up before completing the restart process
  - Restart Ack Recv Adj Count—Number of neighboring IS-IS routers for level 1 routing and level 2 routing that have acknowledged the restart requests sent by the router
  - LAN If DIS Wait Count—Number of interfaces on which the restarting router is waiting to receive election of the designated intermediate system (DIS)
  - Restart CSNP Adj Recv Count—Number of adjacencies for level 1 routing and level 2 routing that have sent complete sequence number PDUs (CSNPs) to provide information about LSP database synchronization
  - Local LSP Wait Count—Number of level 1 and level 2 LSPs for which the restarting router is awaiting complete synchronization

Example

host1#show isis nsf
Configured Timer Values
-----------------------
 Graceful Restart           : Enabled
 T3 Timer                   : Manual
 T3 Timeout Value           : 80
 T2 Timeout Value           : 70(level-1)
                              70(level-2)
 T1 Timeout Value           : 60
 T1 Retry Count             : 3
 Adj. Wait Time             : 30
 
Operation Timer Values
----------------------
 T3 Timer                   : 0
 T2 Timeout Value           : 0(level-1)
                              0(level-2)
 Adj. Wait Time             : 0
 Restart Ack Recv Adj Count : 0(level-1)
                              0(level-2)
 LAN If DIS Wait Count      : 0
 Restart CSNP Adj Recv Count: 0(level-1)
                              0(level-2)
 Local LSP Wait Count       : 0(level-1)
                              0(level-2)

See show isis nsf

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 seconds to complete this SPF run. The elapsed time is in actual clock time, not CPU time.
- First Trigger LSP—Whenever a full SPF calculation is triggered by a new LSP, the LSP ID is stored in the router
- SpfType—Type of SPF run
- Triggers—List of causes that triggered the SPF calculation

Example 1

host1#show isis spf-log 
Level 1 SPF log
When     Duration      First Trigger LSP    SpfType  Triggers
00:01:45 0.000         0000.0000.0000.00-00 Full     LSP Add
00:01:36 0.000         0000.0000.0000.00-00 Full     LSP Add
00:01:31 0.000         0000.0101.0101.00-00 Full     LSP Add
00:00:08 0.000         0000.0101.0101.00-00 PRC      LSP Sequence Update

Example 2

host1#show isis spf-log detail 
Level 1 SPF log
When     Duration      First Trigger LSP    SpfType  Triggers
00:01:53 0.000         0000.0000.0000.00-00 Full     LSP Add
  RTupdt 0.000
  RtLeak 0.000
00:01:44 0.000         0000.0000.0000.00-00 Full     LSP Add
  RTupdt 0.000
  RtLeak 0.000
00:01:39 0.000         0000.0101.0101.00-00 Full     LSP Add
  RTupdt 0.000
  RtLeak 0.000
00:00:16 0.000         0000.0101.0101.00-00 PRC      LSP Sequence Update
  RTupdt 0.000
  RtLeak 0.000

See show isis spf-log

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
- Prefix—IPv6 prefix
- Tag—Number in the range 1–4294967295 that identifies the route tag assigned to the IS-IS IPv6 interface

Example 1—For IS-IS IP addresses

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

Example 2—For IS-IS IPv6 addresses

host1#show isis summary-addresses
Prefix         Level            Metric         Tag     State
------------   -------------    ----------     ------  -------
2008::0/8      LEVEL-2          0              100     ENABLED

See show isis summary-addresses

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
- Next Hop—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

See show isis topology

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.
Examplehost1#undebug isis adj-packets
There is no no version.
See undebug isis

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