Symptom
ACI leaf doesn't forward a packet properly on a BL while using ECMP.
Conditions
- BL.
- ECMP in use for impacted prefixes.
- ACI code is between 15.2(3) and 15.2(5), both included.
- Several link flaps on the links connected to the impacted prefixes.
- Non-BLs too may hit the same symptoms if Remote Tunnels to BLs are marked down due to BFD convergence packets inside the fabric from such BLs. This may still happen with 14.2x releases.
Further Problem Description
Fix for this bug is not only specific to Border Leafs (BL) rather all Leafs where ECMP to External Routes is used.
