Just a question for pros out there who might came across this one, we normally manually set the speed to 100 and duplex to full on switch ports right? As that is the standard practice we do initially before we go on setting trunking or port channels etc...
However when 2960 or 3560 had manual speed 100 and duplex full configured, for some bizzard reason 2960 start errored with duplex mixed match.
But when I configure them to auto speed and duplex, both switch will work happily with each other. Is there a strange bizzard thing with some of the ethernet chips used in 2960/3560? and I also tried the latest IOS for both and still I get this error.
Please help ! :)