Well, the thing is the MAC addrss appears to be moving around thruout the network. One time I see the mac stored in one switch, then onto another switch the next. Another time, the MAC address disappears from the network all together. Whatever this mac is, it's causing the duplicate IP on the network and bringing the applications down.
""Pat Donlon"" wrote in message news:[EMAIL PROTECTED] > Firesox wrote: > > I have a bunch of 3500XL switches thruout my customer's lan. > > They are having a problem with unknown mac keep appearing and disappearing > > from the network. > > > > I can trace the mac-address of the unknown station by "show mac" from the > > swtich CLI. > > What's strange is that it appears at one switch, but a minute later it > > appears in the different switch. > > > > what's even more strange is that all NT/2000 servers log shows there is an > > IP conflict with this mac address. > > Of course, the servers IP function stops due to this duplicate IP, but > comes > > back in a few minutes. > > All the servers report the duplicate IP comes from the same mac address. > > > > Has anyone seen this problem? > > > > Thanks > > **Please support GroupStudy by purchasing from the GroupStudy Store: > > http://shop.groupstudy.com > > FAQ, list archives, and subscription info: > http://www.groupstudy.com/list/cisco.html > > > I know that the NT team where I work had a batch of new HP netservers > delivered last year with the built in NICs with all the same mac > addresses. They had to perform a bios upgrade I think to fix the > problem. You should probably try to find out where what port(s) the > duplicate mac and IP appear. > > Cheers > > Pat > **Please support GroupStudy by purchasing from the GroupStudy Store: > http://shop.groupstudy.com > FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=73916&t=73868 -------------------------------------------------- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
