Step 3: Analyze IS-IS-Link State Packets in Detail

Action

To analyze IS-IS link-state packets (LSPs) in detail, follow these steps:

1. In configuration mode, go to the following hierarchy level:

[edit]

user@host# edit protocols isis traceoptions

2. Configure IS-IS open messages:

[edit protocols isis traceoptions]

user@host# set flag lsp detail 

3. Verify the configuration:

user@host# show

For example:

[edit protocols isis traceoptions]

user@host# show 

file isislog size 5m world-readable;

flag error;

flag lsp detail;

4. Commit the configuration:

user@host# commit

5. View the contents of the file containing the detailed messages:

user@host# run show log filename

For example:

user@host# run show log isislog

Nov 28 20:17:24 Received L2 LSP abc-core-01.00-00, interface so-1/1/0.0

Nov 28 20:17:24     from abc-core-01

Nov 28 20:17:24     sequence 0x1c4f9, checksum 0x9fea, lifetime 1199

Nov 28 20:17:24     max area 0, length 426

Nov 28 20:17:24     no partition repair, no database overload

Nov 28 20:17:24     IS type 3, metric type 0

Nov 28 20:17:24     area address 99.0908 (1)

Nov 28 20:17:24     speaks CLNP

Nov 28 20:17:24     speaks IP

Nov 28 20:17:24     dyn hostname abc-core-01

Nov 28 20:17:24     IP address 10.10.134.11

Nov 28 20:17:24    IP prefix: 10.10.10.0/30 metric 1 up

Nov 28 20:17:24    IP prefix: 10.10.10.4/30 metric 5 up

Nov 28 20:17:24    IP prefix: 10.10.10.56/30 metric 5 up

Nov 28 20:17:24    IP prefix: 10.10.10.52/30 metric 1 up

Nov 28 20:17:24    IP prefix: 10.10.10.64/30 metric 5 up

Nov 28 20:17:24    IP prefix: 10.10.10.20/30 metric 5 up

Nov 28 20:17:24    IP prefix: 10.10.10.28/30 metric 5 up

Nov 28 20:17:24    IP prefix: 10.10.10.44/30 metric 5 up

Nov 28 20:17:24     IP prefix 10.10.10.0 255.255.255.252

Nov 28 20:17:24     internal, metrics: default 1

Nov 28 20:17:24     IP prefix 10.10.10.4 255.255.255.252

Nov 28 20:17:24     internal, metrics: default 5

Nov 28 20:17:24     IP prefix 10.10.10.56 255.255.255.252

Nov 28 20:17:24     internal, metrics: default 5

Nov 28 20:17:24     IP prefix 10.10.10.52 255.255.255.252

Nov 28 20:17:24     internal, metrics: default 1

Nov 28 20:17:24     IP prefix 10.10.10.64 255.255.255.252

Nov 28 20:17:24     internal, metrics: default 5

Nov 28 20:17:24     IP prefix 10.10.10.20 255.255.255.252

Nov 28 20:17:24     internal, metrics: default 5

Nov 28 20:17:24     IP prefix 10.10.10.28 255.255.255.252

Nov 28 20:17:24     internal, metrics: default 5

Nov 28 20:17:24     IP prefix 10.10.10.44 255.255.255.252

Nov 28 20:17:24     internal, metrics: default 5

Nov 28 20:17:24     IS neighbors:

Nov 28 20:17:24     IS neighbor abc-core-02.00

Nov 28 20:17:24     internal, metrics: default 1

[...Output truncated...]

Nov 28 20:17:24     internal, metrics: default 5

Nov 28 20:17:24     IS neighbor abc-brdr-01.00

Nov 28 20:17:24     internal, metrics: default 5

Nov 28 20:17:24     IS neighbor abc-core-02.00, metric: 1

Nov 28 20:17:24     IS neighbor abc-esr-02.00, metric: 5

Nov 28 20:17:24     IS neighbor abc-edge-03.00, metric: 5

Nov 28 20:17:24     IS neighbor abc-edge-01.00, metric: 5

Nov 28 20:17:24     IS neighbor abc-edge-02.00, metric: 5

Nov 28 20:17:24     IS neighbor abc-brdr-01.00, metric: 5

Nov 28 20:17:24    IP prefix: 10.10.134.11/32 metric 0 up

Nov 28 20:17:24    IP prefix: 10.11.0.0/16 metric 5 up

Nov 28 20:17:24    IP prefix: 10.211.0.0/16 metric 0 up

Nov 28 20:17:24     IP prefix 10.10.134.11 255.255.255.255

Nov 28 20:17:24     internal, metrics: default 0

Nov 28 20:17:24     IP prefix 10.11.0.0 255.255.0.0

Nov 28 20:17:24     internal, metrics: default 5

Nov 28 20:17:24     IP prefix 10.211.0.0 255.255.0.0

Nov 28 20:17:24     internal, metrics: default 0

Nov 28 20:17:24     Updating LSP

Nov 28 20:17:24 Updating L2 LSP abc-core-01.00-00 in TED

Nov 28 20:17:24 Analyzing subtlv's for abc-core-02.00

Nov 28 20:17:24 Analysis complete

Nov 28 20:17:24 Analyzing subtlv's for abc-esr-02.00

Nov 28 20:17:24 Analysis complete

Nov 28 20:17:24 Analyzing subtlv's for abc-edge-03.00

Nov 28 20:17:24 Analysis complete

Nov 28 20:17:24 Analyzing subtlv's for abc-edge-01.00

Nov 28 20:17:24 Analysis complete

Nov 28 20:17:24 Analyzing subtlv's for abc-edge-02.00

Nov 28 20:17:24 Analysis complete

Nov 28 20:17:24 Analyzing subtlv's for abc-brdr-01.00

Nov 28 20:17:24 Analysis complete

Nov 28 20:17:24     Scheduling L2 LSP abc-core-01.00-00 sequence 0x1c4f9 
on interface so-1/1/1.0