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1104 CHAPTER 75: IS-IS DEBUGGING COMMANDS
// The IP address took effect on the IS-IS interface.
# Router A and Router B are interconnected and have established an IS-IS
adjacency with each other. Router A is elected as the DIS. Enable debugging for
the received IS-IS packets on Router A and Router B respectively.
ISIS-1-SNP: CSNP Range from 0000.0000.0000.00-00 to ffff.ffff.ffff.ff-ff.
ISIS-1-SNP: Rxed L1 CSNP From 0000.0000.0001 (Vlan100).
ISIS-1-SNP: CSNP Range from 0000.0000.0000.00-00 to ffff.ffff.ffff.ff-ff.
ISIS-1-SNP: Rxed L2 CSNP From 0000.0000.0001 (Vlan100).
// Router B received CSNP packets within a maximum range of
0000.0000.0000.00-00 to ffff.ffff.ffff.ff-ff.
ISIS-1-SNP: Sending L1 CSNP on Vlan100.
ISIS-1-SNP: Sending L2 CSNP on Vlan100.
// Router B sent CSNP packets.
# VLAN-interface 100 on Router A is connected to VLAN-interface 100 on Router
B. Create an IS-IS process on Router A and Router B respectively, enable IS-IS on
the interfaces, and configure them. On Route A, enable local update debugging;
enable IS-IS and then disable it on VLAN-interface 100.
<Sysname>debugging isis self-originate-update
[Sysname-Vlan-interface100]undo isis enable
ISIS-1-UPDT: Deleting from the LSP Neighbour option, TLV 2
ISIS-1-UPDT: Circuit Down Vlan100
ISIS-1-UPDT: Deleting Address 100.1.1.0 from L1 LSPs, TLV: 128
ISIS-1-UPDT: Deleting Address 100.1.1.0 from L2 LSPs, TLV: 128
// The Neighbor TLV was deleted from the local LSPs, and the reachable TLV with
an IP prefix of 100.1.1.0/24 was deleted from the local L1 and L2 LSPs.
[Sysname-Vlan-interface100] isis enable
ISIS-1-UPDT: Circuit Up Vlan100
ISIS-1-UPDT: Adding Address 100.1.1.0 into L1 LSPs, TLV: 128
ISIS-1-UPDT: Adding Address 100.1.1.0 into L2 LSPs, TLV: 128
ISIS-1-UPDT: Adding in the LSP Neighbour option, TLV 2
// The neighbor TLV was added to the local LSPs, and the reachable TLV with an IP
prefix of 100.1.1.0/24 was added to L1 and L2 LSPs.
# Router A and Router B are interconnected. Enable IS-IS on Router A and Router
B respectively. Enable route calculation debugging on Router A.
<Sysname>debugging isis spf-event
// SPF calculation started, with a system level of L12 and SPF run level of 3.
ISIS-1-SPF-TRIG: Starting SPF, Scheduled Event : IS_SPFTRIG_NEWLSP.
Run Level:3
ISIS-1-SPF-EVE: Running Level -1 SPF Run
ISIS-1-SPF-EVE: Adding Self To PATHS
ISIS-1-SPF-EVE: Adding To PATHS: 191.01.01.00/ 255.255.255.00,Cost
10, Number of next hops 1, Preference 0
ISIS-1-SPF-EVE: Loading Level-1 Adjacencies