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ISIS node ID

Created: Jan 25, 2021 13:34:56Latest reply: Jan 25, 2021 13:35:53 490 1 0 0 0
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Hello everyone,

I use the display isis spf-tree command to view the number of routers in the same process. But I have questions about the output of the display isis spf-tree command. What do the last two digits 00 and 01 of the Node ID in the figure represent?

display isis spf-tree

Please help me! Thank you!


Featured Answers
DDSN
Admin Created Jan 25, 2021 13:35:53

Hi WDNJSQ,

00 indicates the physical node that exists in the IS-IS process. 01 indicates a pseudo node. A pseudonode is a virtual node that simulates a broadcast network, not a real router. In IS-IS, a pseudonode is identified by the system ID of the DIS and a 1-byte circuit ID (non-zero value).

I hope it helps!


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All Answers
DDSN
DDSN Admin Created Jan 25, 2021 13:35:53

Hi WDNJSQ,

00 indicates the physical node that exists in the IS-IS process. 01 indicates a pseudo node. A pseudonode is a virtual node that simulates a broadcast network, not a real router. In IS-IS, a pseudonode is identified by the system ID of the DIS and a 1-byte circuit ID (non-zero value).

I hope it helps!


View more
  • x
  • convention:

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