A bug with ID CSCvr31410 was solved to prevent periodic leaf crashes after upgrade to 4.2(1i)
show system reset-reason *************** module reset reason (1) ************* 0) At 2019-09-16T16:36:41.684+01:00 Reason: reset-triggered-due-to-ha-policy-of-reset Service:cdp hap reset Version: 14.2(1i) 1) At 2019-09-16T16:23:43.631+01:00 Reason: reset-triggered-due-to-ha-policy-of-reset Service:cdp hap reset Version: 14.2(1i)
Update from Sep 24, 2019
In an ACI fabric, the vPC IP address is managed by the dhcpd process. Sometimes when deleting vPC/vPC domains, the clean up does not complete. The
fabricExplicitGEp managed object gets deleted, but the corresponding
fabricVpcResource managed object does not get deleted. As a result, upon creating a new vPC pair, the dhcpd process might assign the same IP address that the deleted vPC had. The dhcpd process will crash while assigning a different IP address for second time because of this bug.