Hp switch port issues

[Liam]

I have just upgraded my core switch and all edge switches.

The core is linked to the staff room via 10gb fibre and I then trunk this to other switches.

This port keeps dropping and is reporting errors on the core.

All other edge switches plugged into the other fibre ports are fine. Config is exactly the same for all ports. Stp, speed, vlans etc.

 

Any idea what could be causing this? I'm thinking it's one of the following.

Cabling, faulty switch either core or 2920 in staff room, firmware, faulty fibre module again on core of 2920, a device linked the the staff room causing issues.

 

I plan to get in early tomorrow and start diagnosing with the physical elements like swapping fibre port and patch leads etc.

 

Any suggestions.

 

My more advanced steps include using wire shark to capture what's going on but I'd like to walk before I run.

 

Thanks

 

Liam

[DMcCoy]

Have you tested the fibre? is it OM3/4? Original Gbic? (The compatible lasers don't always seem to last as long).

[Liam]

It's om4. Only fitted and terminate last week

[IanT]

do a "show log" on the core, what does that spit out?

 

Check the SFP, may be dust inside it! (dont use unofficial HP SFP's like people recommend!)

 

Change the fibre cables over

 

Do you have HP ProCurve Manager?

[Liam]

No don't have pro curve manager.

Everything brand new

 

Could this be caused by a loop?

[IanT]

Loop - maybe, whats your ping responces like?

 

Do you have loop-protect and BBPDU Protection on your switches configured?

[ITGURU]

If the fibre is a new install, should be no reason that's faulty.

Connect the switch directly to the core switch with the same fibre patch leads to isolate the fibre run and re-test.

Obviously, also check that your total run if fibre, including patches isn't exceeding the maximum distance on OM4 fibre.

[IanT]

If its a new install go back to the cablers for the test results and check with them.

[Liam]

They are in tomorrow. Arranged it earlier [emoji3]

[ITGURU]

They should have tested whilst on-site and either supplied you with the test results or told you what they are. Usually when I get fibre runs done they give me a green light and say they got very good DB loss on the terminations.

 

Even watched them do the splicing before and how it measures the loss, although some companies will still do the good old cut and polish method.

[Liam]

I was on annual leave when they did it. They have been very understanding and the other cores seems to be working fine

[Liam]

I was on annual leave when they did it. They have been very understanding and the other cores seems to be working fine

[Liam]

Ping responses are inconsistent and time is generally high. I suspect it's a loop so I'll start unplugging tomorrow morning etc

[Liam]

Well it turned out to be the fiber patch lead. I think it was tangled and wasn't operating as it should. As soon as I removed it from all the cable tidy and put it all back it was completely fine.