i use a CAT2948-3L to connect to hosts.i think it could use as a layer2 switch but it failed. so i use ip addressing and routing.the address of F1 and F2 is 192.9.200.20 to 21,but it tell me "192.9.200.0 overlaps......"and i can't assign the address to F2 after assign F1 with 192.9.200.20 the two hosts to be connected can ping themselves.what's the problem? great thanx tony yin **NOTE: New CCNA/CCDA List has been formed. For more information go to http://www.groupstudy.com/list/Associates.html _________________________________ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]