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Cisco Bug: CSCuo68827 - Synced MACs missing in HW after VPC peer-reload (intermittent)

Last Modified

Apr 12, 2017

Products (7)

  • Cisco Nexus 9000 Series Switches
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 9396PX Switch
  • Cisco Nexus 9504 Switch
  • Cisco Nexus 3164Q Switch
  • Cisco Nexus 9508 Switch
  • Cisco Nexus 93128TX Switch

Known Affected Releases

6.1(2)I2(2) 6.1(2)I2(2a)

Description (partial)

Upon VPC reload (either both pairs or only one switch), MACs for some ports does not get installed in hardware on one switch (but show mac address will show it).

This is a timing condition for MAC sync across VPC peer link upon bootup. It affects orphan L2 ports more than VPC ports, although could be seen for VPC ports if traffic for some MACs are only ingressing on one VPC switch.
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