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Analyzing IS-IS Link-State PDUs in Detail

To analyze IS-IS link-state PDUs in detail, follow these steps:

1. Configure IS-IS open messages.
   [edit protocols isis traceoptions]user@host# set flag lsp detail
2. 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;

3. Commit the configuration.
   user@host# commit
4. 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