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Cisco Bug: CSCvs40434 - Introduce validation for a bridge domain in network-centric mode

Last Modified

Aug 27, 2020

Products (1)

  • Cisco Application Policy Infrastructure Controller (APIC)

Known Affected Releases


Description (partial)

When performing a network-centric migration to Cisco ACI, the surrounding network usually can handle only 1 EPG per bridge domain. If the surrounding network is not ready, there could be loop in the network.

This issue occurs in the following situation:

1. You configure two EPGs using different VLANs in the same bridge domain.
2. You extend the VLANs to a Nexus 7000 that performs all the routing for the bridge domains.

This causes two issues:

1. Broadcast and Unknown Unicast traffic sent in VLAN X is replicated back down to the Nexus 7000 in VLAN Y, causing a move.
2. In Cisco ACI, traffic for the gateway MAC address moves between the two EPGs.
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