Extreme EXOS switch block fiber optic port

[marconet_22]

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?

[james698henry · Accepted solution]

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@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?

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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

[marconet_22 · Accepted solution]

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

Thanks a lot for support

[james698henry · Accepted solution]

---

@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

[AdrianO]

Check for anomalies with 

show ports $port transceiver information detail