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Cisco Bug: CSCvs19550 - N9K: high CPU on ipfib and system lockup after frequent IPv6 update/flap/removal

Last Modified

Jan 10, 2020

Products (59)

  • Cisco Nexus 9000 Series Switches
  • Cisco Nexus 3548 Switch
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 3548-X Switch
  • Cisco Nexus 3636C-R Switch
  • Cisco Nexus 92348GC-X Switch
  • Cisco Nexus 9396PX Switch
  • Cisco Nexus 92304QC Switch
  • Cisco Nexus 9396TX Switch
  • Cisco Nexus 92160YC-X Switch
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Known Affected Releases

9.3(2)

Description (partial)

Symptom:
High number of add/delete events of a large number of IPv6 routes might cause high CPU due to an IPFIB process, inband instability (BFD flap, OSPF flap), MGMT instability (SSH, TACACS, slow responses to CLI and in some instances a crash of the IPFIB process.

Conditions:
Issue occurs if there is large number of IPv6 routes flapping in the network.
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