Cisco Systems 1000 Series Manual De Usuario

NTP

RARP

SNMP

TCP

Telnet

TFTP

UDP

Bridge domain interface supports the following IP forwarding features:

IPv4 input and output access control lists (ACL)

IPv4 input and output QoS policies. The operations supported for the input and output service 
policies on a bridge domain interface are:

Classification

Marking

Policing

IPv4 L3 VRFs

A bridge domain interface provides bridging and forwarding services between the Layer 2 and Layer 3 
network infrastructure.

During a packet flow from a Layer 2 network to a Layer 3 network, if the destination MAC address of 
the incoming packet matches the bridge domain interface MAC address, or if the destination MAC 
address is a multicast address, the packet or a copy of the packet is forwarded to the bridge domain 
interface.

MAC address learning cannot not be performed on the bridge domain interface.

In a bridge domain, when flooding unknown unicast frames, bridge domain interface is not included.

When a packet arrives at a Layer 3 physical interface of a router, a route lookup action is performed. If 
route lookup points to a bridge domain interface, then the bridge domain interface adds the layer 2 
encapsulation and forwards the frame to the corresponding bridge domain. The byte counters are 
updated.