Cisco ASR 920 series Configuration Guide Ethernet Router

Method 2
QinQ is also supported when sending packets between an EFP and a trunk EFP. The same external behavior
as Method 1 can be achieved with this configuration:
Customer A
Router (config)# interface gigabitethernet0/1
Router (config-if)# service instance 1 Ethernet
Router (config-if-srv)# encapsulation dot1q 1-100
Router (config-if-srv)# bridge-domain 30
Router (config)# interface gigabitethernet0/0/2
Router (config-if)# service instance trunk 1 ethernet
Router (config-if-srv)# encapsulation dot1q 30
Router (config-if-srv)# rewrite ingress tag pop 1 symmetric
Router (config-if-srv)# bridge-domain from-encapsulation
Again, service instance 1 on Gigabit Ethernet port 0/1 is configured with the VLAN encapsulations used by
the customer. These are forwarded on bridge-domain 30. The service provider facing port is configured as a
trunk port. The trunk port pushes a tag matching the bridge-domain that the packet is forwarded on (in this
case S-VLAN 30).
For double tagged (S-VLAN = 30, C-VLAN = 1 to 100) packets coming in from the provider network, the
trunk port pops the outer S-VLAN (30) and forwards the packet on that bridge-domain.
Customer B
Router (config)# interface gigabitethernet0/3
Router (config-if)# service instance 1 Ethernet
Router (config-if-srv)# encapsulation dot1q 1-200
Router (config-if-srv)# bridge-domain 40
Router (config)# interface gigabitethernet0/0/4
Router (config-if)# service instance trunk 2 Ethernet
Router (config-if-srv)# encapsulation dot1q 40
Router (config-if-srv)# rewrite ingress tag pop 1 symmetric
Router (config-if-srv)# bridge-domain from-encapsulation
You can also combine the customer A and B configurations, as follows:
Customer A and B
Router (config)# interface gigabitethernet0/2
Router (config-if)# service instance trunk 1 ethernet
Router (config-if-srv)# encapsulation dot1q 30,40
Router (config-if-srv)# rewrite ingress tag pop 1 symmetric
Router (config-if-srv)# bridge-domain from-encapsulation
For information about the effect on cost of service (CoS) for different EFT tagging operations, see the Cisco
ASR 920 Router Chassis Software Configuration Guide.
Example for VLAN Translation Configurations
•
For 1-to-1 VLAN translation configuration:
Router (config)# interface gigabitethernet0/1
Router (config-if)# service instance 965 ethernet
Carrier Ethernet Configuration Guide (Cisco ASR 920 Series)
32
Ethernet Virtual Connections Configuration
Configuring IEEE 802.1Q Tunneling and Layer 2 Protocol Tunneling Using EFPs

Cisco ASR 920 series Specifications

General

Brand	Cisco
Model	ASR 920 series
Category	Network Router
Language	English