Symptom

For an end host, connected via a lacp port-channel to a Nexus N9K-C93108TC-FX3P running in fex mode, when one of the port-channel's interface goes down there is a traffic disruption. As per ELAM, It was noticed that the fex is dropping the traffic coming from the host due to "UC_TENANT_MYTEP_BRIDGE_MISS"

Conditions

* End host connected via lacp port-channel to the FEX * The Fex is a 93108TC-FX3P * Fex is dual homed to a pair of vPC switches * One of the interfaces between the end host and the fex goes down

Workaround

Issue is specific to single member port-channel. Won't see this issue if HIF PO has more then two members. As Workaround the port-channel facing the end host should have more than 2 interfaces

Further Problem Description