07-23-2021 02:29 PM
I have a fiber connection between a Cisco SBS350 switch and a Netgear. Everything was working fine for several weeks until I decided to upgrade the Cisco firmware. After the upgrade the fiber port is showing "operationally down". I rolled back the firmware and still no connection.
07-23-2021 02:33 PM
I should also add that that switch has another fiber connection to an identical Cisco and that one stayed up after the upgrade.
07-23-2021 04:15 PM
have you taken the backup of config, before and after post-upgrade? check on the interface is there config changed?
The only option I can see here is to reset to factory and test it.
07-25-2021 04:45 PM
I did that and still nothing. I power cycled the Netgear and the port briefly came up and then back down.
07-26-2021 01:30 AM
what is the Logs you see on Cisco switch side?
07-26-2021 07:36 AM
It just shows %LINK-I-UP: gi51 and then %LINK-I-DOWN: gi51
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