Weird connectivity issue /w switch & SFP+ from other vendors

jsathaseevan
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Weird connectivity issue /w switch & SFP+ from other vendors

I have an MS225-48 and an MS225-48FP stacked. They are working great.

They have replaced 3 x Netgear S3300-28X switches that we used in our main closet. These three switches have now been moved to 3 new buildings. Everything works great over copper and 1GB.

 

We had a vendor come in and run us some fiber so we could make use of the 10GB connections on both sets of switches. 

 

For the building I'm occupying, I've used 2 x Tripp-Lite N286-10G-SR-S 10GB SFP+ on both my end, and the Meraki end in the main building. Works GREAT. Meraki dashboard tells me everything is A-OK and connected at 10GB Full duplex. Netgear switch tells me the same.

 

The next building, same configuration, will not give me a connection (except over copper). Same part numbers. I've had the vendor come back and test the lines (I can see light as well), and I've even removed the very SFP+ modules connecting my building to try and connect the new building. Nothing. I've switched out the patch cables, also using the ones from the working configuration. 

 

I'm at a loss for words. Meraki support has informed me that as the SFP+ modules aren't their nor are the switches on the other end, they can troubleshoot no further.

 

Any ideas?

8 REPLIES 8
ww
Kind of a big deal
Kind of a big deal

Re: Weird connectivity issue /w switch & SFP+ from other vendors

Swap 1 switch from stack to other building 

PhilipDAth
Kind of a big deal

Re: Weird connectivity issue /w switch & SFP+ from other vendors

Are you getting no link light?

 

Number #1 issue - you need to swap the send/receive fibres over.

Bruce
Kind of a big deal

Re: Weird connectivity issue /w switch & SFP+ from other vendors

What length is the fibre run? What fibre is it, single-mode (OS1, OS2), or multi-mode (OM3, OM4)?

jsathaseevan
Just browsing

Re: Weird connectivity issue /w switch & SFP+ from other vendors

Thanks for that. Simplest thing I haven't tried yet. I swapped the switch...the working switch from my building went into the new building.

 

STILL NO JOY! I'm thinking there is simply an issue with the cabling and I will have to find another vendor to come out and check the issue

jsathaseevan
Just browsing

Re: Weird connectivity issue /w switch & SFP+ from other vendors

Thank you for your reply.

 

No link light.

Indeed I switched the send/receive fibers around. I ensured there was light passing through the entire drop and patch cables...and that the lights did not collide.

jsathaseevan
Just browsing

Re: Weird connectivity issue /w switch & SFP+ from other vendors

Thank you for your reply.

 

The fiber run is OM3, multimode, <100m. I have a copper run that is currently allowing the building to have Internet access. 

PhilipDAth
Kind of a big deal

Re: Weird connectivity issue /w switch & SFP+ from other vendors

Another thing you could try is to move the switch to right next to the core (temporarily) and connect them using a fibre patch lead.  If that works, you know it is not the kit or SFP's.

Bruce
Kind of a big deal

Re: Weird connectivity issue /w switch & SFP+ from other vendors

Did the installer provide you a test report showing the loss across each of the fibre cores from end to end? It sounds like a fibre problem, but as Philip said move the switch and test with a patch lead, that will pretty much confirm if it’s the fibre run or the kit.

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