Are you collecting logs for your switches? If you are sending logs to a syslog server, take a look there for any clues. Also, never reboot before looking at the log file on the switch itself. One more thing, take a look at the flash and look for a crash file.
No, not sending off to a syslog server at the moment. That would be smart... Good point about not rebooting before looking at the logs. I didn't realize rebooting flushed the logs, but running the 'show log' command looks like that's the case. Anything I can look at with the logs flushed?
keep an eye on the processor "sh proce cpu" I would also read the release notes for the specific version of IOS you are running and look for bugs that might be causing the ports to shut down. Keep checking the log file on the switch itself for any error messages. Set up a syslog server and the send the logs to it. It can save you lots of headache.
This document gives several answers on frequently asked questions for PFRv3 channel state behavior.
Q1: What are all the channel operational states from a BR (border role) perspective and what are the rules/conditions to be in each st...
The need was to reach an host inside a LAN through a VPN connection managed by the LAN gateway (Cisco 1921).
The LAN gateway performs NAT and there was a dedicate nat rule for the host i wanted to reach through VPN.
I couldn't connect to the hos...
We have 3 identical switches configured by someone else and would like to claim some of the Gigabit ports(G1/G2/G3/G4) for use on servers. When we try to change the wiring and configuration, we run in to connectivity issues. Attached is a des...