Troubleshooting guide

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Cisco Broadband Local Integrated Services Solution Troubleshooting Guide
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Chapter 9 Troubleshooting Cisco Media Gateways
Troubleshooting VISM Cards
PXM Display Log CLI Command
Use the PXM dsplog command to display useful information for troubleshooting your VISM card. The
log is maintained by the PXM. A VISM entry is displayed in the log in the following format:
• Date and time of the log
• Slot number of the VISM card from which a message is logged
• The process on the VISM card that logged that message
• Severity of the message:
– 1 = Fatal error which causes the card to reboot
– 6 = All other errors
• A log message description
The following example shows the results of a typical dsplog command:
09/09/2001-02:09:01 03 cam VISM-6-9157
VISM got time from PXM
PXM Diagnostic Loopback Path CLI Commands
The VISM-8T1 and VISM-8E1 cards provide the capability for creating loopback paths for diagnostic
purposes. Use the VISM and PXM diagnostic loopback CLI commands to troubleshoot your VISM
cards. The following loopback configurations are possible:
• Local line loopback. Use the PXM addlnloop command to enable local line loopback on a
line-by-line basis. Use the PXM dellnloop command to disable local line loopback.
• Remote line loopback. The PXM cnfbert command is a T1/E1 diagnostic test package which
includes some loopback tests.
Use the BERT and loopback functions to test the integrity of T1 and E1 lines. You can use the the
PXM cnfbert command on the PXM to perform the following actions:
– Run BERT on a per-line basis on the VISM card.
– Put a VISM line on a TDM side loopback.
– Put a VISM line on a network side loopback.
– Cause the VISM to put test equipment residing on the far side into loopback.
• OAM loopback through the CPU toward the network (per VC). This loopback is enabled
automatically; no PXM or VISM CLI commands are required.
• DS0 loopback, at the compression DSP toward the TDM side. Use the PXM addendptloop
command to enable DS0 loopback on a DS0-by-DS0 basis. Use the PXM delendptloop command
to disable DS0 loopbacks.
• VC remote loopback. Use the PXM addconloop command to enable VC remote loopbacks. Use the
PXM delconloop command to disable remote loopbacks.
PXM1E and PXM 45 Display CLI Commands
Refer to the Cisco MGX 8850 Installation and Configuration Guide and the Cisco MGX 8000 Series
Switch Command Reference for information on the following PXM1, PXM1E, and PXM45 card display
commands.