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Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide
Chapter Configuring Ethernet CFM and Y.1731 Performance Monitoring on Layer 3 Interfaces
Ethernet Data Plane Loopback
Service Instance : N/A
Direction : External
Time out(sec) : none
Status : on
Start time : *10:14:23.507 UTC Mon Oct 21 2013
Time left : N/A
Dot1q/Dot1ad(s) : 1-100
Second-dot1q(s) : 1-1101
Source Mac Address : Any
Destination Mac Address : Any
Ether Type : Any
Class of service : Any
Llc-oui : Any
Total Active Session(s): 1
Total Internal Session(s): 0
Total External Session(s): 1
Troubleshooting the Ethernet Data Plane Loopback Configuration
Table 2 lists the debug commands to troubleshoot issues pertaining to the Ethernet Data Plane Loopback
feature.
The Cisco IOS Master Command List at
http://www.cisco.com/en/US/docs/ios/mcl/allreleasemcl/all_book.html provides more information
about these commands.
Caution Because debugging output is assigned high priority in the CPU process, it can diminish the performance
of the router or even render it unusable. For this reason, use debug commands only to troubleshoot
specific problems or during troubleshooting sessions with Cisco technical support staff.
Note Before you run any of the debug commands listed in the following table, ensure that you run the logging
buffered debugging command, and then turn off console debug logging using the no logging console
command.
Table 2 debug Commands for Ethernet Data Plane Loopback Configuration
debug Command Purpose
debug elb-pal-pd all Displays all the debugging information about the
Ethernet data plane loopback configuration.
debug elb-pal-pd error Displays debugging information about Ethernet data
plane loopback configuration errors.
debug elb-pal-pd event Displays debugging information about Ethernet data
plane loopback configuration changes.
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