Cisco Bug: CSCvi75081 - ACI: hardware mac entry incorrect for vpc interface after peer reloads
Jun 01, 2018
- Cisco LAN Switch Software
Known Affected Releases
Symptom: Hardware is mis-programmed for an endpoint that is learned on a vPC interface while its peer is down. As an example, if leaf101 and leaf102 are a vPC pair, the problem is that leaf102 has programmed the host MAC behind the vPC interface without the isvpc flag, which changes the hardware macdainfo interface value. To check for the issue, run the following command on leaf102: #vsh_lc # show platform internal hal objects ep l2entry extensions asic-unit all | grep -A 20 -B 6 <mac address> <snip> APD OBJECT EP SUGASICPDL2ENTRY destisptr : 0x0 learninfo : 0x2 epghw : 0x2c56 fid : 0x1274 destidx : 0x49 isvpc : 0x0 <---------------------- interface is vPC, this should be set to 1 Conditions: The trigger for this issue is as follows: 1) Reload the vPC peer. 2) While the vPC peer is down, learn the endpoint on the vPC interface. 3) When the vPC peer comes back online, the isvpc flag is not updated in hal.
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