I have a 3548XL switch and a 2620 router with the IOS Plus loaded. The IP address of the 2620 is 10.10.1.1 and the IP address of the 3548 is 10.10.1.2 (VLAN1) I have created two VLANs on the 3548XL, VLAN10 (10.10.10.1) and VLAN20 (10.10.20.1). Port 48 on the 3548 connects to the 2620's FE port. On the 2620 I have created the following sub interfaces: To Trunk VLAN1: int f0/0.1 encap isl 1 ip add 10.10.1.2 255.255.255.0 To Trunk VLAN10 int f0/0.10 encap isl 10 ip add 10.10.10.1 255.255.255.0 To Trunk VLAN20 int f0/0.20 encap isl 20 ip add 10.10.20.1 255.255.255.0 On the 3548 on int f0/48 I enter the following to start trunking: switchport mode trunk switchport trunk encap isl As soon as I do this I can no longer ping the router from the switch and vice-versa. When I set port 48 on the 3548 back to access mode I can ping again. I think I am confused about the IP addresses to set. For example the router's IP is 10.10.1.1 and the switch IP (VLAN1) is 10.10.1.2. When I create the subinterface for VLAN1 on the router what IP address should I assign to the subinterface (as well as for sub interfaces f0/0.10 and f0/0.20)? Jeff _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
