Configuring A Ber Test - Cisco 10000 Series Configuration Manual

Chapter 4 4-Port Channelized T3 Half-Height Line Card Configuration
In the following example, the idle character is set to flags:
Router(config)# interface serial 1/0/0
Router(config-if)# idle-character flags
Some systems interpret marks (or 0xff) as an abort signal. Therefore, flags (or 0x7e) is preferred.
Note

Configuring a BER Test

You can configure an unchannelized T3 interface to run a bit error rate (BER) test. The test can be used
in checking cables and solving signal problems in the field. To send a BER test pattern on an
unchannelized T3 interface, use the following interface configuration command:
[no] bert [errors number | pattern pattern] interval time
Where:
•
•
•
You can terminate a BER test at any time using the no bert command.
For more information, refer to the online
The following are example of configuring a BER test:
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•
To show BER test statistics, use the show controllers t3 slot/subslot/port bert command in EXEC or
privileged EXEC mode:
Router# show controllers t3 6/1/0 bert
T3 6/1/0 is up.
BERT test result (done)
Test Pattern : 2^15, Status : Not Sync, Sync Detected : 1
Interval : 5 minute(s), Time Remain : 0 minute(s)
Bit Errors (since BERT started): 0 bits,
Bits Received (since BERT started): 13025 Mbits
Bit Errors (since last sync): 0 bits
Bits Received (since last sync): 13025 Mbits
OL-8834-04
errors number is 1 to 255.
pattern pattern is
– 0s—Repetitive test pattern of all zeros (00000... )
– 1s—Repetitive test pattern of all ones (11111... )
2^15—Pseudorandom O.151 test pattern (32,768 bits long)
–
2^20-O153—Pseudorandom O.153 test pattern (1,048,575 bits long)
–
QRSS-2^20—Pseudorandom QRSS O.151 test pattern (1,048,575 bits long)
–
2^23—Pseudorandom O.151 test pattern (8,388,607 bits long)
–
alt-0-1—Repetitive alternating test pattern of zeros (0s) and ones (1s), for example 01010101
–
interval time is 1 to 1440 minutes.
Send a BER test pseudorandom pattern of 2^20 through T3 interface 1/0/0 for 5 minutes.
Router(config)# interface serial 1/0/0
Router(config-if)# bert pattern 2^20 interval 5
Send a repetitive pattern of all 1s through T3 interface 1/0/0 for 1440 minutes.
Router(config)# interface serial 1/0/0
Router(config-if)# bert pattern 1s interval 1440
Cisco 10000 Series Internet Router Troubleshooting
Cisco 10000 Series Router Line Card Configuaration Guide
Unchannelized T3 Commands
Guide.
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