TDR Cable Test on EX switches

 http://dataplumber.wordpress.com/2012/02/24/tdr-cable-test-on-ex-switches-cli-procedure/

TDR Cable Test on EX switches – CLI procedure…

24 02 2012

1 Votes

I recently wrote up my experience with a cable-test wizard in the JWeb interface, and was prompted to give it a go at the CLI. Turns out you can do that too of course…

First, kick the test off:

root@EX4200> request diagnostics tdr start interface ge-1/0/2    

Interface TDR detail:
Test status                     : Test successfully executed  ge-1/0/2 

{master:0}
root@EX4200>

You need to wait a while for the test to run before typing the command to show the results – if you’re too keen you will see this:

root@EX4200> show diagnostics tdr interface ge-1/0/2 

Interface TDR detail:
Interface name                  : ge-1/0/2
Test status                     : Started

{master:0}
root@EX4200>

After about 30 seconds, issue the command again and you’ll see the results:

root@EX4200> show diagnostics tdr interface ge-1/0/2    

Interface TDR detail:
Interface name                  : ge-1/0/2
Test status                     : Passed
Link status                     : Down
MDI pair                        : 1-2
  Cable status                  : Open
  Distance fault                : 3 Meters
  Polartiy swap                 : N/A
  Skew time                     : N/A
MDI pair                        : 3-6
  Cable status                  : Open
  Distance fault                : 3 Meters
  Polartiy swap                 : N/A
  Skew time                     : N/A
MDI pair                        : 4-5
  Cable status                  : Open
  Distance fault                : 2 Meters
  Polartiy swap                 : N/A
  Skew time                     : N/A
MDI pair                        : 7-8
  Cable status                  : Open
  Distance fault                : 3 Meters
  Polartiy swap                 : N/A
  Skew time                     : N/A
Channel pair                    : 1
  Pair swap                     : N/A
Channel pair                    : 2
  Pair swap                     : N/A
Downshift                       : N/A   
                                        
{master:0}
root@EX4200>