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Cisco Bug: CSCvv80634 - [SRTE-731] show tech routing isis takes 20 minutes to complete with 1000 ISIS interfaces

Last Modified

Oct 01, 2020

Products (1)

  • Cisco 8000 Series Routers

Known Affected Releases

7.3.1.BASE

Description (partial)

Symptom:
With large number (~1000) of ISIS interfaces configured (need not be active) and 'nsf cisco' enabled, the command:

    show isis checkpoint interface

will cause the show client process to loop forever or crash due to memory exhaustion.
XML data output may loop forever.

The same problem will happen with:

  show tech-support routing isis

which will display the same table.
As a result, show tech output could be incomplete.

Same problem can happen with 'show isis checkpoint adjacency' when there're a large number (~1000) of ISIS adjacencies.

Conditions:
'nsf cisco' configured under 'router isis'.
Large number (~1000) of ISIS interfaces configured (for: show isis checkpoint interface ; ISIS interfaces need not be active).
Large number (~1000) of ISIS adjacencies. (for: show isis checkpoint adjacency)
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