topic Re: CRC errors stack ports exos 16.2.5.4 in ExtremeSwitching (EOS)

CRC errors stack ports exos 16.2.5.4

Andrei1989 — Tue, 27 Oct 2020 13:46:59 GMT

Good afternoon. I am using a project stack of 4 extreme switches (2-x670 vim 4-40G4X module, 2-x460 v80 module). I am constantly seeing an increase in CRC errors on stack ports. Modules were replaced by me. Updated switch version to 16.2.5.4 patch1-20. However, the growth of CRC continues. The debug hal settings have also been changed. CRC errors continue to grow. Please help me fix the problem.

After upgrading the switch version, the second switch in the x670 stack (role Backup) is always lit indicating on the ports as active, even if the port is forced down.

Re: CRC errors stack ports exos 16.2.5.4

StephanH — Tue, 27 Oct 2020 15:02:58 GMT

Hello Andrei,

did you check and changed the stacking cable?

check this articles:

https://gtacknowledge.extremenetworks.com/articles/Solution/stacking-cables-causes-CRC-errors

Regards

Stephan

Re: CRC errors stack ports exos 16.2.5.4

Andrei1989 — Tue, 27 Oct 2020 16:32:43 GMT

Hello, Stephan

I am checking the cable stack. But CRC errors may not appear for about 1-2 weeks, but after that the growth continues again.

Re: CRC errors stack ports exos 16.2.5.4

Andrei1989 — Tue, 27 Oct 2020 16:37:20 GMT

Re: CRC errors stack ports exos 16.2.5.4

StephanH — Tue, 27 Oct 2020 17:11:52 GMT

Hello Andrei,

Ports 1:1, 3:1, … (from your screenshot) are no stacking ports. So I am not sure but you wrote CRC errors increase on stacking ports.

Re: CRC errors stack ports exos 16.2.5.4

Andrei1989 — Tue, 27 Oct 2020 17:24:48 GMT

Didn't quite understand you about non-stack ports?

Re: CRC errors stack ports exos 16.2.5.4

StephanH — Tue, 27 Oct 2020 18:57:12 GMT

Hello Andrei,

I mixed up the ports where the stacking cable are pluged and the “normal” data ports because of your wrote you changed the modules.

If the problem are the data ports like in your screenshots. Typically the problem is caused, by defective patch cable, or to long cable lines. The stacking cable should not be the cause here.

Regards

Stephan

Re: CRC errors stack ports exos 16.2.5.4

Andrei1989 — Tue, 27 Oct 2020 21:11:00 GMT

Thanks, Stephan. Tell me why the indication is green on one module, blue on the second switch.

Re: CRC errors stack ports exos 16.2.5.4

Andrei1989 — Tue, 27 Oct 2020 21:11:38 GMT

Re: CRC errors stack ports exos 16.2.5.4

StephanH — Wed, 28 Oct 2020 04:01:03 GMT

Hello Andrei,

normally green == 10G and blue == 40G. You should see these on the left upper side in the module, there should be a control led in green and blue.

If you see 10G there is maybe a missconfiguration and both switches need to have the same port speeds. In addition von 10G you need fanout cables.

Please check the port config.

Regards

Stephan

Re: CRC errors stack ports exos 16.2.5.4

Andrei1989 — Thu, 29 Oct 2020 12:30:41 GMT

Hello Stephan.Today QSFP cables have been replaced which are used in the stack. The situation is similar, the growth of errors continues.

Re: CRC errors stack ports exos 16.2.5.4

Andrei1989 — Thu, 29 Oct 2020 13:01:34 GMT

The whole problem is that multicast traffic passes through STACK