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GM
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GM
Posts: 2
Registered: ‎03-07-2008
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EX-series TDR support?

How does one configure Time Domain Relectometry (TDR) on the EX copper ports?

 

TDR is mentioned in the Datasheet, but I haven't found anything relevant in the 9.1 documentation.

Thanks. 

Distinguished Expert
dfex
Posts: 707
Registered: ‎04-17-2008
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Re: EX-series TDR support?

I haven't got one handy, but try looking under the "show interfaces diagnostics ?" - there is a section there for optical interfaces, and the TDR might be there for copper ones
Ben Dale
JNCIP-ENT, JNCIS-SP, JNCIE-SEC #63
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Distinguished Expert
dfex
Posts: 707
Registered: ‎04-17-2008
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Re: EX-series TDR support?

Actually, ignore my last post - now that I've got a switch in front of me, use the following:

 

request diagnostics tdr start interface <interface name>

show diagnostics tdr OR

show diagnostics tdr interface <interface name> 

 

When you are finished, use:

 

request diagnostics tdr interface abort interface <interface name>

 

This will reset any previous diagnostics run on the interface.  The output looks like this:

 

dfex@EX4200> show diagnostics tdr interface ge-0/0/0 


Interface TDR detail:

Interface name                  : ge-0/0/0

Test status                     : Passed

Link status                     : Down

MDI pair                        : 1-2

  Cable status                  : Normal

  Distance fault                : 0 Meters

  Polartiy swap                 : N/A

  Skew time                     : N/A

MDI pair                        : 3-6

  Cable status                  : Normal

  Distance fault                : 0 Meters

  Polartiy swap                 : N/A

  Skew time                     : N/A

MDI pair                        : 4-5

  Cable status                  : Impedance Mismatch

  Distance fault                : 0 Meters

  Polartiy swap                 : N/A

  Skew time                     : N/A

MDI pair                        : 7-8

  Cable status                  : Impedance Mismatch

  Distance fault                : 1 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 

Ben Dale
JNCIP-ENT, JNCIS-SP, JNCIE-SEC #63
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