Symptom

Glean ARP (0xfff2, 239.255.255.240) flood is stopped on the transit leaf switch and is not delivered toward all the leaf switches in the fabric. Thus, silent host discovery does not work.

Conditions

This issue occurs with a stretched Cisco ACI fabric or multipod, and any-to-any redirect is enabled with the default filter in the endpoint VRF table.

Workaround

In PBR, change the default filter to IP or something more specific.

Further Problem Description