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Cisco Bug: CSCup48073 - NVE macs not fully relearnt on clear mac addr / ip route - flooding

Last Modified

Feb 04, 2017

Products (1)

  • Cisco Nexus 9000 Series Switches

Known Affected Releases

6.1(2)I2(2.53) 6.1(2)I2(2.81)

Description (partial)

Symptom:
After clear mac address of mac addresses / clear ip route * learnt on NVE on a VPC pair, some macs may be installed only on one VPC node, leading to flooding for those macs. This can be checked by using the show mac address command on both vpc switches. One of the switches will have some macs missing.

clear ip route * trigger on VPC node can also cause this.

Conditions:
clear mac address / clear ip route * on a VPC pair with traffic coming in from the VXLAN overlay network.
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