Configuring A Ber Test - Cisco 10000 Series Configuration Manual

Chapter 4 4-Port Channelized T3 Half-Height Line Card Configuration

Configuring a BER Test

You can configure an individual T1 interface to run an independent BER test. The test is used to check
cables and solve signal problems in the field. To send a BER test pattern on a T1 interface, use the
following command in controller configuration mode:
[no] t1 t1-number bert pattern pattern interval time
Where:
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•
•
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Note
You can terminate a BER test at any time using the no form of the command.
For more information, refer to the online
The following are examples of configuring a BER test:
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To show BER test statistics, use the show controllers t3 slot/subslot/port t1-number bert command in
EXEC or privileged EXEC mode:
Router# show controllers t3 6/1/1/1 bert
T3 6/1/1/1 is up. Hardware is C10K Half Height CT3 line card
T1 1
OL-8834-04
t1-number is T1 interface number 1 to 28.
time is 1 to 14,400 minutes.
pattern is
– 0s—Repetitive test pattern of all zeros (00000... )
1s—Repetitive test pattern of all ones (11111... )
–
2^11—Pseudorandom test pattern (2048 bits long)
–
2^15—Pseudorandom O.151 test pattern (32,768 bits long)
–
2^20-O153—Pseudorandom O.153 test pattern (1,048,575 bits long)
–
2^20-QRSS—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
–
3in24—Fixed test pattern of F0100 0100 0000 0000 0000 0100 (3 bits are 1s in 24 bits)
–
1in8—Fixed pattern of F0100 0000 (1 bit is a 1 in 8 bits)
–
2in8—Fixed pattern of F0100 0010 (2 bits are 1s in 8 bits)
–
unframed causes the BER test pattern to use the entire T1 bandwidth, including the T1 framing and
payload bits. If unframed is omitted, the T1 is either SF or ESF framed as configured by the T1
framing command, and the BER test pattern occupies only the T1 payload bits.
For each T3, you can run only one BER test at a time.
Send a BER test pseudorandom pattern of 2^20 through T1 interface 10 for 5 minutes.
Router(config)# controller T3 1/0/0
Router(config-controller)# t1 10 bert pattern 2^20 interval 5 unframed
Send a repetitive pattern of all 1s through T1 interface 10 for 14,400 minutes (240 hours).
Router(config)# controller T3 1/0/0
Router(config-controller)# t1 10 bert pattern 1s interval 14400 unframed
[
unframed
Cisco 10000 Series Internet Router Troubleshooting
Cisco 10000 Series Router Line Card Configuaration Guide
Channelized T1 Commands
]
Guide.
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