Ethernet Switches & Routers

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Frequent Contributor
Posts: 117
Registered: ‎07-26-2010

MLX 10G local fault causing link flapping

Hello all.

Has anybody seen the following error log message on a NI MLX:

Aug 25 03:10:19:ISmiley FrustratedYSTEM: port 7/2 is down(local fault
Aug 25 03:10:19:ISmiley Frustratedystem: Interface ethernet 7/2, state down - local fault

We see this these days very often causing serious issues in the network.

We have already replaced the XFP two times but it did not resolve this local fault issue.

What is a local fault?

Defective linecard?

Software issue?

Does anybody know what exactly is causing a local fault?

Hopefully anybody has seen this and resolved this in his network?!

Thank you,

Karl

New Contributor
Posts: 2
Registered: ‎01-27-2011

Re: MLX 10G local fault causing link flapping

Were you using a non brocade SFP+?  I am in the same boat right now.  I am using a non brocade SFP+ and interface will not go out of local fault.  I am trying to find an undocumented command like cisco has  "service unsupported-transceiver" .  Any help appreciated.

 

Chad V.

Frequent Visitor
Posts: 1
Registered: ‎04-17-2016

Re: MLX 10G local fault causing link flapping

[ Edited ]

Hello,

 

Regrettably i have same problem with you.Nowadays, I have  started to encounter local fault logs on my MLX router frequently. However, 

interestingly, i am using Brocade SFP+, not non- Brocade SFP+. Despite this, i see these logs very often.

Like this :

 

Apr 16 14:09:14:I: System: Interface ethernet 4/8, state up
Apr 16 14:09:14:I: System: Interface ethernet 4/8, state down - local fault
Apr 16 14:09:14:I: SYSTEM: port 4/8 is down( local fault 1)

 

Does anybody have an idea about frequent local fault logs? 

 

Possible issues :

 

Duplex mismatch ( Both ends have same duplex-fdx, not different duplex)

Cabling( I am using OM3 multimode fiber cable)

SFP+ ( As i said, they are Brocade but i don't know if i should change them newer ones)

 

 

Thanks

 

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