10Gig ports going down-local fault

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  • Updated 4 years ago
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case number 01084747 related

our 10gig ports on summit series 440 to 460 will go down losing connectivity. We are seeing this spread out through our network. Some switches have been fine for months then suddenly they start flopping up and down. Many times we have to go out to the remote switch and pull the sfp and reinsert it for connectivity to resume.

We have a stack where this is occurring that is not customer affecting(no traffic) and have used this location to troubleshoot. But we do have other locations that this is customer affecting.

We have replaced the 10gig module in the back with a new one.
We have duplicated the issue with both copper passive cables and multimode cables. 
We do still record light coming from the side that remains up. making me conclude that the link is still physically up, but software down. 

Has anyone else seen this?
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christopher madison

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Posted 4 years ago

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Reggie Yourse, Extreme Alumnus

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Hi Chris,

Thanks for posting this.  I had this escalated in TAC so a high level engineer can help assess this and get a plan in place to correct this issue.  You should hear from this engineer shortly.

Take care,


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Hello Chris,

If its a 10 gig link could you check the logs on both the switches matching the time stamp.
I assume you are using 10 G XGM module.
There were known issues with XGM modules which is fixed in specific exos versions for X460.
Need more information to confirm if the issue is seen with copper 10g as well.
first of logs are needed.
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Grosjean, Stephane, Employee

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Can you try upgrading to 15.5.3 latest patch?