Cisco ASR 903 Guide

Layer 2 Solution
Ethernet Virtual Circuit using Trunk EFP ▀
Cisco ASR 903 Router Design and Deployment Guide▄
OL-30526-01
13
Maximum address limit: 256000
GigabitEthernet0/1/0 service instance 11
GigabitEthernet0/1/2 service instance 11
Nile Mac Address Entries
BD mac addr type ports
------------------------------------------------------------------------------
11 c8f9.f98d.103f DYNAMIC Gi0/1/2.Efp11
11 c8f9.f98d.503f DYNAMIC Gi0/1/0.Efp11
Ethernet Virtual Circuit using Trunk EFP
Trunk EFP can be used to group two or more services instances into one, which can greatly reduce the
configuration burden for large network deployment. Unlike the previous example, only one service instances is
created to bridging the traffic between PEs. In trunk EFP configuration, the second S-Tag will be imposed to the
frame on the trunk link.
Figure 2. Ethernet Virtual Circuit with Trunk EFP
ASR903-PE2
Gi0/1/1 Gi0/1/1
Gi0/1/0 Gi0/1/2Gi0/1/0Gi0/1/1
ASR903-PE1ASR903-CE1 ASR903-CE2
172.16.11.0/24 - SubnetB
172.16.11.0/24 – SubnetB
Customer A
Site 2
10 10 10
40 11
10 10
11 40 11
30
11 11 11
10 30
172.16.10.0/24 - SubnetA
172.16.10.0/24 – SubnetA
ASR903-CE1 Configuration
bridge-domain 10
member GigabitEthernet0/1/1 service-instance 10
!
bridge-domain 11
member GigabitEthernet0/1/1 service-instance 11
!
interface GigabitEthernet0/1/1
no ip address
negotiation auto
service instance 10 ethernet ! create service instances
encapsulation dot1q 10
rewrite ingress tag pop 1 symmetric ! to use BDI, pop is required.
! ! otherwise rewrite may not be needed.
service instance 11 ethernet
encapsulation dot1q 11
rewrite ingress tag pop 1 symmetric
!

Cisco ASR 903 Specifications

General

Brand	Cisco
Model	ASR 903
Category	Network Router
Language	English