topic Re: Ethernet ports not coming up on 5420M in ExtremeSwitching (VSP/Fabric Engine)

Ethernet ports not coming up on 5420M

Jave — Fri, 18 Jul 2025 07:46:36 GMT

Hi everybody,

Today, a post with an odd problem. Few weeks ago, I was faced with 3 contiguous ethernet ports on a 5420M-48W-4YE switch which won't come up whereas PoE was delivering power. Admin state was up, but nothing. Making a test directly with a standard PC on same port was failing too: no ethernet connectivity. Switch was running since one year without problem. Rebooting it or even resetting it was unusefull. So I opened a case and RMA was initiated.
Ok. But yesterday, I was facing same issue with a new switch same model...and so I decided to ask you if someone encountered same problem or if anybody have an idea...

Regards.

Re: Ethernet ports not coming up on 5420M

Jose_Chaves — Fri, 18 Jul 2025 13:39:06 GMT

Hi,

Yes, I got the same problem but on a 5520 and a similar one on the 4120.

Regards,

José Chaves

Re: Ethernet ports not coming up on 5420M

jerrygen — Sat, 26 Jul 2025 04:11:39 GMT

I have the same problem

Re: Ethernet ports not coming up on 5420M

SamPirok — Mon, 11 Aug 2025 15:52:16 GMT

Sounds like something our engineers need to dig into further, was anyone able to open a case for this issue? And if so, was there a resolution besides and RMA?

Re: Ethernet ports not coming up on 5420M

Jave — Mon, 18 Aug 2025 08:44:16 GMT

Hi @SamPirok

Not able to open a specific case because considered device is not covered by a support contract. When I've opened the case, direct RMA was proposed to me, that's all.

Best regards.

Re: Ethernet ports not coming up on 5420M

SamPirok — Mon, 25 Aug 2025 13:16:22 GMT

Unfortunately, RMA maybe the only answer here, we might be looking at fault ports. If you do follow through with an RMA, our techs will test the returned device to see if they can find the issue, which will hopefully help us prevent this issue coming up for anyone in the future.