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Cisco Bug: CSCvi05870 - VPC Bundle member flaps causing traffic drop when TOR comes up from reload

Last Modified

Nov 22, 2019

Products (1)

  • Cisco Nexus 9000 Series Switches

Known Affected Releases


Description (partial)

On reload, vPC interfaces are temporarily brought online and then brought down.  During this transition, traffic loss may be seen for 3-10 seconds.

This issue occurs after leaf reload and affects vPC port-channels.  This is most prevalent when using port channels in mode-on (that is, with LACP disabled).  It can also occur under high scale environments with large number of VLANs configured on multiple interfaces.
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