hi all can anybody help me. i have a catalyst 5505 connected to a 2610 fastethernet interface. vlans are configured in the catalyst and are trunked to the fa interface. in the fa interface subinterfaces encapsulation for vlans are created in the router. but still router does not connect to the switch and carrying the vlan traffic. when i debug vlan packet on router it gives vLAN: Received ISL encapsulated UNKNOWN packet bearing colour ID 5 on interface FastEthernet1/0.5 which is not configured to route or bridge this packet type can anybody help me regards jagan Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=18394&t=18394 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]