| Information to Monitor | Command | Example |
| Status of IS-IS interfaces | show isis interface | user@host> show isis interface IS-IS interface database: Interface L CirID Level 1 DR Level 2 DR L1/L2 Metric fxp0.0 3 0x2 Disabled Disabled 10/10 fxp1.0 3 0x3 mpls6.03 mpls6.03 10/10 lo0.0 0 0x1 Passive Passive 0/0 sr0.0 3 0x1 Point to point Point to point 10/10 sr1.0 3 0x1 Point to point Point to point 10/10 |
| Hostname mapping | show isis hostname | user@host> show isis hostname IS-IS hostname database: System Id Hostname Type 1921.6800.4201 isis1 Dynamic 1921.6800.4202 isis2 Static 1921.6800.4203 isis3 Dynamic |
| Database entries | show isis database | user@host> show isis database IS-IS level 1 link-state database: LSP ID Sequence Checksum Lifetime (secs) crater.00-00 0x12 0x84dd 1139 1 LSPs IS-IS level 2 link-state database: LSP ID Sequence Checksum Lifetime (secs) crater.00-00 0x19 0xe92c 1134 badlands.00-00 0x16 0x1454 985 carlsbad.00-00 0x33 0x220b 1015 ranier.00-00 0x2e 0xfc31 1007 1921.6800.5066.00-00 0x11 0x7313 566 1921.6800.5067.00-00 0x14 0xd9d4 939 6 LSPs |
| Remove database entries | clear isis database | user@host> clear isis statistics user@host> show isis statistics IS-IS level 1 link-state database: LSP ID Sequence Checksum Lifetime (secs) IS-IS level 2 link-state database: LSP ID Sequence Checksum Lifetime (secs) |
| IS-IS routing table entries | show isis route | user@host> show ospf route IS-IS routing table Current version: L1: 89 L2: 158 Prefix L Version Metric Type Interface Via 10.1.1.1/32 2 158 20 int so-1/0/0.0 router-d ge-2/1/0.0 router-d 10.10.20.16/29 2 158 20 int ge-4/2/0.0 router-b 10.10.20.24/29 2 158 20 int so-1/0/0.0 router-d ge-2/1/0.0 router-d 10.10.20.102/32 2 158 10 int ge-4/2/0.0 router-b 10.10.20.103/32 2 158 20 int so-1/0/0.0 router-d |
| Adjacent routers | show isis adjacency | user@host> show isis adjacency brief IS-IS adjacency database: Interface System L State Hold (secs) SNPA so-1/0/0.0 karakul 3 Up 26 so-1/1/3.0 1921.6800.5080 3 Up 23 so-5/0/0.0 1921.6800.5080 3 Up 19 |
| Clear adjacent routers | clear ospf adjacency | user@host> clear ospf adjacency user@host> show ospf adjacency IS-IS adjacency database: Interface System L State Hold (secs) SNPA so-1/0/0.0 karakul 3 Initializing 26 so-1/1/3.0 1921.6800.5080 3 Up 24 so-5/0/0.0 1921.6800.5080 3 Up 21 |
| SPF calculations | show isis spf | user@host> show isis spf brief IS-IS level 1 SPF results: IS-IS level 2 SPF results: Node Metric Interface Via SNPA badlands.00 23 so-1/2/0.0 1921.6800.5067 so-1/0/0.0 1921.6800.5067 so-1/1/0.0 1921.6800.5067 so-1/3/0.0 1921.6800.5067 carlsbad.00 13 so-1/2/0.0 1921.6800.5067 so-1/0/0.0 1921.6800.5067 so-1/1/0.0 1921.6800.5067 so-1/3/0.0 1921.6800.5067 1921.6800.5064.00 13 so-1/2/0.0 1921.6800.5067 so-1/0/0.0 1921.6800.5067 so-1/1/0.0 1921.6800.5067 so-1/3/0.0 1921.6800.5067 1921.6800.5067.00 10 so-1/2/0.0 1921.6800.5067 so-1/0/0.0 1921.6800.5067 so-1/1/0.0 1921.6800.5067 so-1/3/0.0 1921.6800.5067 1921.6800.5066.00 10 so-2/2/0.0 1921.6800.5066 so-2/0/0.0 1921.6800.5066 so-2/1/0.0 1921.6800.5066 so-2/3/0.0 1921.6800.5066 5 nodes |
| General IS-IS statistics | show isis statistics | user@host> show isis statistics IS-IS statistics for merino: PDU type Received Processed Drops Sent Rexmit LSP 12227 12227 0 8184 683 IIH 113808 113808 0 115817 0 CSNP 198868 198868 0 198934 0 PSNP 6985 6979 6 8274 0 Unknown 0 0 0 0 0 Totals 331888 331882 6 331209 683 Total packets received: 331888 Sent: 331892 SNP queue length: 0 Drops: 0 LSP queue length: 0 Drops: 0 SPF runs: 1014 Fragments rebuilt: 1038 LSP regenerations: 425 Purges initiated: 0 |
| Clear IS-IS statistics | clear isis statistics | user@host> clear isis statistics user@host> show isis statistics |