Changing SFP MTU crashes the switch

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diegomayan
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Changing SFP MTU crashes the switch

Wed Aug 03, 2022 8:17 pm

As said, changing the MTU on a SFP interface of a WS-12-250-DC crashes the switch. I had to manually cut the power to it to regain access. The switch boots with the old config.

Tried on 1.5.5 and 1.5.14, and with 2000 and 9600 MTU. Changing MTU on the electric ports works OK.

Please tell me if I can provide more info. I have attached the edited config at https://pastebin.com/iYYvMZTR

Screenshot at https://imgur.com/a/BySxGRi

Thanks

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mayheart
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Re: Changing SFP MTU crashes the switch

Thu Aug 04, 2022 8:11 am

I think the problem you're seeing is the SFP port goes down and doesn't come back up.

I've experienced this myself with adding vlans.

A few of us have reported this as a bug already.

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KBrownConsulting
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Re: Changing SFP MTU crashes the switch

Thu Aug 04, 2022 4:19 pm

You said you had to manually cut the power... It's interesting the switch didn't revert the config on it's own. Did you wait longer than the Revert Timer and see if the switch came back online with the old config on it's own?

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