Cisco Tips & Tricks

May 7, 2006

Using Cisco BERT to Monitor Link Quality

Filed under: Router — ciscotips @ 5:21 am

Cisco bit-error-rate testing (BERT) is a very helpful utility for monitoring link quality; just loop the suspected media at the far end, configure a BERT profile, and run a test for the needed duration. The user profiles are stored as part of the configuration in the NVRAM. We can define a maximum of 15 profiles on the system. This provides the results in terms of pass or fail. You can use the tool can to remotely verify your media from the command-line interface (CLI) and quickly isolate media problems.

!

<Define BERT Profile>

bert profile 1 pattern 211-O.152 threshold 10^-2

error-injection none duration 60

!

<Run The Test>

Router#bert controller e1 0 profile 1

<Output>

Router#show controllers e1 bert

Controller E1 0 Profile default : Test Never Ran

Controller E1 0 Profile 1 : Test passed with BER of 10^(-2) —-> [wow Media is OK till the looped end]

Controller E1 1 Profile default : Test Never Ran

Controller E1 1 Profile 1 : Test Never Ran

Controller E1 2 Profile default : Test Never Ran

Controller E1 2 Profile 1 : Test Never Ran

Controller E1 3 Profile default : Test Never Ran

Controller E1 3 Profile 1 : Test Never Ran

Controller E1 4 Profile default : Test Never Ran

Controller E1 4 Profile 1 : Test Never Ran

Controller E1 5 Profile default : Test Never Ran

Controller E1 5 Profile 1 : Test Never Ran

Controller E1 6 Profile default : Test Never Ran

Controller E1 6 Profile 1 : Test Never Ran

Controller E1 7 Profile default : Test Never Ran

Controller E1 7 Profile 1 : Test Never Ran

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