topic Re: Extreme EXOS switch block fiber optic port in ExtremeSwitching (EOS)

Extreme EXOS switch block fiber optic port

marconet_22 — Fri, 11 Jul 2025 10:05:36 GMT

I setup n°2 x440, they connected by fiber optic.

Fiber port shutdown without any error and it works only when unplug and plug fiber connnector.

What can i check?

Re: Extreme EXOS switch block fiber optic port

AdrianO — Fri, 11 Jul 2025 13:17:39 GMT

Check for anomalies with

show ports $port transceiver information detail

Re: Extreme EXOS switch block fiber optic port

james698henry — Sat, 12 Jul 2025 11:11:31 GMT

@marconet_22 wrote:
Hi
I setup n°2 x440, they connected by fiber optic.
Fiber port shutdown without any error and it works only when unplug and plug fiber connnector.
What can i check?

Hello @marconet_22,
Check the transceiver status using `show ports <port> transceiver information detail`—look for signal loss or power anomalies. Also verify correct SFP module compatibility, clean fiber ends, and ensure auto-negotiation or duplex settings match on both ends. A mismatch or dirty connector can silently trigger port shutdown.

Best Regards,
James Henry

Re: Extreme EXOS switch block fiber optic port

marconet_22 — Tue, 15 Jul 2025 08:16:04 GMT

we change fiber optic cable LC/LC and it doesn't stop more.

Thanks a lot for support