23Feb/110
Cisco Nexus 1000V drops packets when Mac Pinning
Symptoms
- Packets are dropped when using the Cisco Nexus 1000V 4.0(4)SV1(2)
- This issue occurs when:
- You have configured Mac Pinning (mac-pinning) as a workaround for mac flapping
- Physical switches are in a port channel configuration across disparate switchesNote: Physical switches do not support VSS (Virtual Switch Switching).
Resolution
This issue has has been resolved in Cisco Nexus1000V 4.0(4)SV1(3). For more information, see Resolved Caveats in the Cisco Nexus1000V Release Notes, Release 4.0(4)SV1(3).
IGMP snooping is enabled by default on the Cisco 1000V. To work around this issue, disable IGMP snooping with the command:
#no ip igmp snooping
For more information about Mac Pinning, Cisco Nexus1000V Release Notes, Release 4.0(4)SV1(2).