04-15-2008 11:52 AM - edited 03-03-2019 09:34 PM
I have a 1760 with a 4 port switch. Port 0/4 shows protocol down. Can anyone tell me how to trouble shoot? I have switched my servers from 0/3 to 0/4 and it is still down.
04-15-2008 12:04 PM
Hi, B:
Protocol down means that the layer 2 protocol running on your switch port is not synchronizing properly with the layer 2 protocol running on your server NIC.
Do the usual:
Ensure that all cables are properly connected.
Replace existing ethernet cables with KNOWN good ones
Check the speed and duplex settings. Make sure they are either hard-coded on both ends or set to auto-negotiate on both ends. If it's a gig port, just leave both ends set for auto, for starters.
Check the server NIC -- replace it if necessary.
Bounce the switch port
Reboot the switch
Smash switch with 5-pound hammer. :-)
HTH
Victor
04-15-2008 12:34 PM
Hi Victor,
You are a funny guy, I like your style:)
However, you never know, he may take it word for word :)
Otherwise you're right.
Cheers:
Istvan
04-15-2008 12:42 PM
LOL
Istvan, what's up, buddy?? Long time!
I hope all is well.
I do read your posts and, as usual, I'm loving them! :-)
Good "talking" to you.
Victor
04-15-2008 12:54 PM
The hammer actually worked! Just kidding. I did the old reboot the router an it came back up.
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