Restrictions for Bridge Domain Interfaces
The following are the restrictions pertaining to bridge domain interfaces:
- Only 4096 bridge domain interfaces are supported per system.
- For a bridge domain interface, the maximum transmission unit (MTU) size can be configured between 1500 and 9216 bytes.
Bridge domain interfaces support only the following features:
- IPv4 Multicast
- QOS marking and policing. Shaping and queuing are not supported
- IPv4 VRF
- IPv6 unicast forwarding
- Dynamic routing such as BGP, OSPF, EIGRP, RIP, ISIS, and STATIC
- Hot Standby Router Protocol (HSRP) from IOS XE 3.8.0 onwards.
- Virtual Router Redundancy Protocol (VRRP) from IOS XE 3.8.0 onwards.
Bridge domain interfaces do not support the following features:
- PPP over Ethernet (PPPoE)
- Bidirectional Forwarding Detection (BFD) protocol
- Network-Based Application Recognition (NBAR) or Advanced Video Coding (AVC)
NAT is supported from XE16.2.1 and later releases.