C H A P T E R 11 Configuring Bridge Domain Interfaces; Ethernet Virtual Circuit Overview; Assigning A Mac Address; Support For Ip Protocols - Cisco ASR1000-RP1 - ASR 1000 Series Route Processor 1 Router Software Configuration Manual

Information About a Bridge Domain Interface
Prior to configuring a bridge domain interface, you must understand the following concepts:
•
•
•
•
•
•

Ethernet Virtual Circuit Overview

An Ethernet Virtual Circuit (EVC) is an end-to-end representation of a single instance of a Layer 2
service being offered by a provider to a customer. It embodies the different parameters on which the
service is being offered. In the Cisco EVC Framework, the bridge domains are made up of one or more
Layer 2 interfaces known as service instances. A service instance is the instantiation of an EVC on a
given port on a given router. Service instance is associated with a bridge domain based on the
configuration.
An incoming frame can be classified as service instance based on the following criteria:
•
•
•
•
Service instance also supports alternative mapping criteria:
•
•
For more information on the EVC architecture, see Configuring Ethernet Virtual Connections on the
Cisco ASR 1000 Router chapter in the Carrier Ethernet Configuration Guide located at
http://www.cisco.com/en/US/docs/ios-xml/ios/cether/configuration/xe-3s/ce-ether-vc-infra-xe.html.

Assigning a MAC Address

All the bridge domain interfaces on the Cisco ASR 1000 chassis share a common MAC address. The first
bridge domain interface on a bridge domain is allocated a MAC address. Thereafter, the same MAC
address is assigned to all the bridge domain interfaces that are created in that bridge domain.
You can configure a static MAC address on a bridge domain interface using the mac-address command.
Note

Support for IP Protocols

Bridge domain interface supports the following IP-related protocols:
•
Cisco ASR 1000 Series Aggregation Services Routers Software Configuration Guide
11-2
Ethernet Virtual Circuit Overview, page 11-2
Assigning a MAC Address, page 11-2
Support for IP Protocols, page 11-2
Support for IP Forwarding, page 11-3
Packet Forwarding, page 11-3
Bridge Domain Interface Statistics, page 11-4
Single 802.1Q VLAN tag, priority-tagged, or 802.1ad VLAN tag
Both QinQ (inner and outer) VLAN tags, or both 802.1ad S-VLAN and C-VLAN tags
Outer 802.1p CoS bits, inner 802.1p CoS bits, or both
Payload Ethernet type (five choices are supported: IPv4, IPv6, PPPoE-all, PPoE-discovery, and
PPPoE-session)
Untagged—Mapping to all the frames lacking a 802.1Q or 802.1ad header
Default—Mapping to all the frames
UDP
Chapter 11 Configuring Bridge Domain Interfaces
OL-16506-10