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Cisco Bug: CSCum56237 - N5k:Delay in advertising Msdp Sa-Cache when null pim register received.

Last Modified

Mar 09, 2018

Products (7)

  • Cisco Nexus 5000 Series Switches
  • Cisco Nexus 5596UP Switch
  • Cisco Nexus 5548P Switch
  • Cisco Nexus 6004 Switch
  • Cisco Nexus 6001 Switch
  • Cisco Nexus 5548UP Switch
  • Cisco Nexus 5596T Switch

Known Affected Releases

6.0(2)N1(2)

Description (partial)

Symptom:
MSDP SA-Cache advertisement delay when null pim register message received.

Conditions:
MSDP configured on 2 N5k running VPC. This bug is specific to VPC and on N5k platform only.

When both the N5k VPC peers are FHRs,  if the packet happens to ingress through the VPC bind VRF vlan on one VPC peer before coming on the correct vlan ,then due to RPF failure, there might be delay in setting routes. 
Also, if PIM protocol creates a route based on receiving a NULL register instead of a register then SA messages are not sent right away.  This might add delay too.
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Bug Details Include

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