Troubleshooting guide

6-21
ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-01
Chapter 6 Troubleshooting Switch Router ATM Network Connections
Troubleshooting SVC Connections on a PNNI Routing Network
If static route has not been configured, see the “Initially Configuring the switch router” chapter in the
ATM Switch Router Software Configuration Guide. Otherwise, continue with the next phase of SVC
troubleshooting if you still have not determined the problem with the SVC configuration.
Debugging SVC Signalling
Use the following debug commands to check SVC signalling:
Follow these steps to turn on signaling debugging and then retry the set-up of the SVC from EndSys1.
Step 1 Use the debug atm sig-all atm card/subcard/port command to enable signaling debugging for the
originating end switch router UNI interface (on RemDvLs1 ATM 3/1/1).
Step 2 Retry to set up the SVC from EndSys1.
If no debug printouts occur on the switch router (RemDvLs1 in this example), then the problem is
upstream on either the originating UNI interface, on the originating switch router itself, or in EndSys1.
Note Confirm that terminal monitor has been enabled on the switch router by entering the
terminal monitor EXEC command.
Step 3 If debug printouts do occur, turn off further printouts by using the no debug all command.
Step 4 Scroll up to the beginning of the debug printouts to confirm the following:
• Check for a valid Called Party Address and Calling Party Address. If these are not valid or are not
displayed, recheck the EndSys1 configuration.
• Check for the message ROUTING INTERFACE: err_code = PNNI_SUCCESS. If you do not see this
message, continue to the “Debugging PNNI SVC Routing” section on page 6-24.
• Check to see whether there is an Input Event: Rcvd Release printout indicating a received release
and look at the cause = reason and location. This indicates that the problem is downstream of the
originating UNI, so proceed to the “Debugging PNNI SVC Routing” section on page 6-24 and then
proceed to the “Checking SVC Downstream” section on page 6-27.
Command Purpose
debug atm sig-all atm card/subcard/port Confirms the SVC connection to the
intended destination ATM NSAP address.
no debug all Turns off debugging.