Configuration Examples For Ethernet Data Plane Loopback; Session Id - Cisco 1941W Configuration Manual

Chapter Configuring Ethernet CFM and Y.1731 Performance Monitoring on Layer 3 Interfaces
To start Ethernet data plane loopback, run the following command:
Command
Step 1
ethernet loopback start local
interface gigabitethernet
slot/port.sub-port external timeout
none
Example:
Router#ethernet loopback start local
interface gigabitethernet 0/2.1101
external timeout none
To stop Ethernet data plane loopback, perform the following steps:
Command
Step 1
ethernet loopback stop local
interface gigabitethernet
slot/port.sub-port id session-id
Example:
Router#ethernet loopback stop local
interface gigabitethernet 0/2.1101 id
1
Step 2
show ethernet loopback active
Example:
Router#show ethernet loopback active

Configuration Examples for Ethernet Data Plane Loopback

This example shows how to configure Ethernet data plane loopback using single tagging:
Router>enable
Router#configure terminal
Router(config)#interface gigabitethernet 0/2.1101
Router(config-subif)#encapsulation dot1q 100
Router(config-subif)#ethernet loopback permit external
Router(config-subif)#end
This example shows how to configure Ethernet data plane loopback using double tagging:
Router>enable
Router#configure terminal
Router(config)#interface gigabitethernet 0/2.1101
Router(config-subif)#encapsulation dot1q 100 second-dot1q 1101
Router(config-subif)#ethernet loopback permit external
Router(config-subif)#end
This example shows how to start an Ethernet data plane loopback:
Router#ethernet loopback start local interface gigabitethernet 0/2.1101 external timeout
none
Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide
Purpose
Starts Ethernet external loopback on a subinterface.
Enter timeout as none to have no time out period for the
loopback.
Purpose
Stops Ethernet external loopback on a subinterface.
Enter the value of the loopback session ID to specify the
loopback session that you want to stop.
Displays information to verify if the loopback session has
ended.
Ethernet Data Plane Loopback
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