What is Cisco ACI Bridge Domain?
The Bridge Domains are often referred to as being “like a VLAN” and this is close, but not entirely accurate. They are like a VLAN in that they contain layer 2 broadcast domains or unique subnets. However, the more accurate term for an ACI Bridge Domain is that it is a VXLAN VNID segment with an assigned multicast group. You must populate a bridge domain with at least one IP subnet, but can add more than one subnet to a bridge domain.
