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Cisco Bug: CSCuj35697 - BFD flaps unexpectedly on Nexus 7k

Last Modified

Apr 13, 2018

Products (6)

  • Cisco Nexus 7000 Series Switches
  • Cisco Nexus 7000 10-Slot Switch
  • Cisco Nexus 7000 4-Slot Switch
  • Cisco Nexus 7000 18-Slot Switch
  • Cisco Nexus 9508 Switch
  • Cisco Nexus 7000 9-Slot Switch

Known Affected Releases

6.1(1) 6.1(2) 6.1(4)

Description (partial)

BFD sessions unexpectedly flap.

Additionally, BFD sessions can become stuck in an "Admin Down" state:

OurAddr         NeighAddr       LD/RD                 RH/RS           Holdown(mult)     State       Int                   Vrf  
...     1124073496/0          AdminDown       N/A(3)            Down        Po4                   RED

Can happen due to a BFD process crash on the switch, linecard crash, or a manual reboot of a linecard.
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