topic Re: Fiber Connection Failing in Wireless

Fiber Connection Failing

AndrewGibbons8 — Tue, 11 Oct 2022 16:26:11 GMT

Hi All,

I'm working on a group of IE2000s connected by multimode fiber. I have 10 instant's and configured the same way and 9/10 are functioning properly, but that one won't communicate on either fiber port. I've checked the transceiver detail of both Gig SFP ports and confirmed that we are receiving light from both ends; however, there is no communication between the end.

I'm not sure if I've explained this well enough, so let me know what more details I can include and thanks ahead of time for any help.

Re: Fiber Connection Failing

balaji.bandi — Tue, 11 Oct 2022 16:29:37 GMT

If you see the Light coming then try to twist fibre patch and test it.

example :

A--A

B--B

A-B

B-A

Re: Fiber Connection Failing

AndrewGibbons8 — Tue, 11 Oct 2022 16:51:52 GMT

Hi Balaji,

Thanks for the quick response. We had already tried reversing the polarity to no avail. Do you have any other ideas?

Re: Fiber Connection Failing

balaji.bandi — Wed, 12 Oct 2022 11:29:02 GMT

Try Fibre patch loop see is the loop working ?

is this direct single cable , how far ? any other patch pannel involved in between.

Try no negotiation option.

still not working can you post from both the sides.

show run interface x/x

show interface x/x

show interface x/x trans