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Cisco Bug: CSCun69113 - N7K - Crash in "ifmgr" Process When Unbinding Invalid Interface from VDC

Last Modified

Aug 03, 2016

Products (8)

  • Cisco Nexus 7000 Series Switches
  • Cisco Nexus 7000 10-Slot Switch
  • Cisco Nexus 7000 4-Slot Switch
  • Cisco Nexus 7700 6-Slot Switch
  • Cisco Nexus 7700 18-Slot Switch
  • Cisco Nexus 7000 18-Slot Switch
  • Cisco Nexus 7000 9-Slot Switch
  • Cisco Nexus 7700 10-Slot Switch

Known Affected Releases

6.2(6) 7.1(0)MPL(0.28)

Description (partial)

"ifmgr" crashes when attempting to unbind a non-existing port from a VDC.

A line card must be misreporting how many ports it has. Eg: a 32 port card reporting it has 48 ports, as seen in "show vdc internal port-hash".  These non-existent ports may be bound to VDC1 by default. It's unknown at present how a card would get into this state.

`show vdc internal port-hash`
Interface   If_index      Vdc_id
---------   --------      ------
Eth1/33     XXXXXXXX      1
. . .
Eth1/48     XXXXXXXX      1

Note: If the above output is seen and slot 1 is a 32 port card, this is obviously abnormal. If it was a 48 port card, this is expected. The bug is triggered in the former case.
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