Cisco ASR 920 Series Configuration Manual Ethernet Router page 431

Configuring IEEE 802.1ad
Command or Action
Step 5
service instance [trunk] number ethernet
Example:
Router(config-if)# service instance trunk
1 ethernet
Step 6 encapsulation dot1q
Example:
Router(config-if-srv)# encapsulation dot1q
10
Step 7
bridge-domin bridge-id from-encapsulation
Example:
Router(config-if-srv)# bridge-domain
from-encapsulation
Step 8 rewrite ingress tag { pop {1 | 2} symmetric
Example:
Router(config-if-srv)# rewrite ingress tag
pop 1 symmetric
Step 9 end
Example:
Router(config-if-srv)# end
Configuration Examples
The example shows the Trunk EFP configuration on the C-UNI port.
interface GigabitEthernet0/3/7
ethernet dot1ad uni c-port
service instance trunk 20 ethernet
encapsulation dot1q 20-30
rewrite ingress tag pop1 symmetric
bridge-domain from-encapsulation
The example shows the Trunk EFP configuration on the NNI port.
interface GigabitEthernet0/5/2
ethernet dot1ad nni
service instance trunk 20 ethernet
Configuring the IEEE 802.1ad on Trunk EFP Service Instances
Purpose
Configure an EFP (service instance) and enter service instance
configuration) mode
• The number is the EFP identifier, an integer from 1 to 4000
• The trunk keyword identifies the trunk ID to which the service
instance is assigned.
Trunk EFP (without port channel) supports
Note
encapsulation of up to 1000 Vlans.
Configure encapsulation type for the service instance.
• dot1q—Configure 802.1Q encapsulation.
Configures the router to derive bridge domains from the
encapsulation VLAN list.
(Optional) Specify that encapsulation modification to occur on
packets at ingress.
• pop 1—Pop (remove) the outermost tag.
• pop 2—Pop (remove) the two outermost tags.
• symmetric—Configure the packet to undergo the reverse of
the ingress action at egress. If a tag is popped at ingress, it is
pushed (added) at egress. This keyword is required for rewrite
to function properly.
Return to privileged EXEC mode.
Carrier Ethernet Configuration Guide (Cisco ASR 920 Series)
413