john316 Posted January 13, 2011 Posted January 13, 2011 Hi We're encountering some gremlins on our system and I've been digging through some log files on the switches and see a few of these logged: Jan 13 10:34:31:605 2011 MSTP Critical PFWD Instance 0's GigabitEthernet1/0/16 has been set to forwarding state! Jan 13 10:34:31:599 2011 IFNET Warning LINK UPDOWN GigabitEthernet1/0/16: link status is UP Jan 13 10:34:29:234 2011 IFNET Warning LINK UPDOWN GigabitEthernet1/0/16: link status is DOWN Jan 13 10:34:06:789 2011 MSTP Critical PFWD Instance 0's GigabitEthernet1/0/16 has been set to forwarding state! Jan 13 10:34:06:783 2011 IFNET Warning LINK UPDOWN GigabitEthernet1/0/16: link status is UP Jan 13 10:34:04:394 2011 IFNET Warning LINK UPDOWN GigabitEthernet1/0/16: link status is DOWN What would generate something appearing in the log files on a fairly common basis? Thanks in advance!
cpjitservices Posted January 13, 2011 Posted January 13, 2011 Looks like you have an iffy cable somewhere - "Warning LINK UPDOWN GigabitEthernet1/0/16: link status is DOWN" - Critical PFWD Instance 0's GigabitEthernet1/0/16 has been set to forwarding state! either that or you have a dodgy port - I'd try and test your cable since the port is fluctuating up / down. Also if your switch supports spanning-tree just check the settings, See if it's compatible Spanning-tree with other switches - Make sure the port hasn't been blocked for any reason. Hope this helps
abramm Posted December 9, 2011 Posted December 9, 2011 Hi Sorry to revive an old thread but did you ever find a solution to your problem? We are experiencing a similar problem in one of our schools and just wondered if you had any suggestions? Many Thanks Andy
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