Hi.. I have one of my 2900 switch connected to my backbone switch(5500). A few day ago, I found that the switch to switch connection has duplex mismatch error. The 2900 sw interface was set to 100 full dpx. But the 5505 sw interface was set to auto neg, but they fail to negotiate properly. Therefore, I tried to set the 5505 sw interface to 100 full dx. But immediately after I set, the whole company network hang. All users lost connection for more than 10 minutes.
I really can't understand why?? The 2900 sw has only one connection to the 5505 sw and both interface set to portfast (faststart) disable. I think it is related to spanning-tree but why spanning-tree loop will happen in this case. Can one explain to me. Thanks a lot _________________________________________________________________ Protect your PC - get McAfee.com VirusScan Online http://clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3963 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=60090&t=60090 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
