such as below: routerA(fas0)--------(fas0)routerB routerA# interface fas0 ip add 1.1.1.1 255.255.255.0 router ei 1 net 1.0.0.0 no au routerB# interface fas0 ip add 1.1.1.2 255.255.255.0 ip add 1.1.2.2 255.255.255.0 router ei 1 net 1.0.0.0 no au from the debug ip ei output ,i saw that routerB advrtise the route 1.1.2.0 255.255.255.0 out fas 0, but from the routerA,use sh ip ei to,i can't see route to 1.1.2.0 from routerA. both routers got ios 12.0,ip ei nei established. thanks in advance! Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=13691&t=13691 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]