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35-6
Cisco ASR 901 Series Aggregation Services Router Software Configuration Guide
OL-23826-09
Chapter 35 Layer 2 Control Protocol Peering, Forwarding, and Tunneling
How to Configure Layer 2 Control Protocol Peering, Forwarding, and Tunneling
• If an interface is configured with layer 2 protocol forwarding, then L2CP packets on the interface
are flooded on to the bridge domain. The flooding follows the translations specified in interface.
SUMMARY STEPS
1. enable
2. configure terminal
3. interface type number
4. l2proto-forward tagged protocol
5. service instance id ethernet
6. encapsulation untagged
7. l2protocol forward [protocol]
8. bridge-domain bridge-id
DETAILED STEPS
Command Purpose
Step 1
enable
Example:
Router> enable
Enables privileged EXEC mode.
• Enter your password if prompted.
Step 2
configure terminal
Example:
Router# configure terminal
Enters global configuration mode.
Step 3
interface
type number
Example:
Router(config)# interface gigabitethernet
0/1
Specifies an interface type and number and enters interface
configuration mode.
Step 4
l2proto-forward tagged
protocol
Example:
Router(config-if)# l2proto-forward tagged
cdp
Configures a layer 2 control protocol forwarding on an interface.
• protocol—Specifies the protocol to be forwarded.
Step 5
service instance
id
ethernet
Example:
Router(config-if)# service instance 20
ethernet
Configures an Ethernet service instance on an interface.
• id—Integer that uniquely identifies a service instance on an
interface.