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Cisco 600 Series Installation and Operation Guide
78-11190-01
Chapter 6
Troubleshooting
BERT Testing (Cisco 675, Cisco 675e and Cisco 676 only)
Receiving BERT Data
After the CPEs have been BERT enabled, they will send S-PRBS9 BERT data
toward the Cisco 6100 or Cisco 6260. The HP can verify the BERT data one
channel at a time. Follow this procedure to receive BERT data:
Step 1
Select the receive filter from the Optical Line Interface Card and not the Cell
Processor Card. This is the net/strainer icon.
Step 2
Specify the VPI and VCI that needs to be checked. The receive filter mode should
be Virtual Channel.
Step 3
Select S-PRBS9 and AAL1. Now, only the specified cells will make it to the
statistics counters.
Step 4
Select the statistics icon (ones and zeros). Select
View
and
ATM Statistics
.
Step 5
Select
Selected Cell Count
,
Bandwidth
,
Cell Loss
, etc.
Step 6
Apply.
Step 7
Select measurements and start the counters.
This will give you the statistics for the cell currently selected in the receive filter.
Repeat the above procedure to check other channels. The Cell Protocol Processors
can be used to view incoming cells if desired.
Cisco 600 Series CPE Configuration
Configure the CPE to perform BERT testing:
Step 1
Log in to the CPE via Ethernet or serial port.
Step 2
Give access to the BERT commands:
cbos>
enable debug commands
Step 3
Keep the CPEs from trying to retrain even though they do not see the CO
equipment on the far end:
cbos#
ifconfig wan0 stay
