it is safe to say that the errdisable state that a switchport may go through is inconvenient at best and a pain in the ass mostly...
make a mistake with channel groups or port security and you'll find the ports you're working on go belly up with this silliness, and the default recovery time interval is 300 seconds... damn...
this is the link that explains the reasoning and recovery procedures for errdisable...
you have to reset the timer, then enable the timer, and still wait a minimum of 30 seconds for recovery...
http://www.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00806cd87b.shtml
a simple no shut will not do... the procedures in the link outline recovery, but there is an easier way... once the port is errdisabled, go to the interface, issue shut, then no shut and the interface will come back... who'd a thought...
download this pdf now to your local drive... you don't want to get all twisted up with something like this, especially under pressure...
network cisco ccna gns3 certification arteq
a network runs through it
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