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 Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=73873&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
