Use a route map. This is a newer feature. Check that it will work on your version of IOS. It is also known as policy based routing. http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/12cgcr/qos_c /qcpart1/qcpolicy.htm#5351 Create a route map. router#(config) route-map A permit 10 router#(config) set interface s0/0 Apply it to an interface. router#(config-if) int fa0/0 router#(config-if) ip policy route-map A router#(config-if) ip route-cache policy router#(config-if) exit I haven't tested this but it should work for your first condition. Create a similar one for Fa0/1. -----Original Message----- From: net974 at Yahoo [mailto:[EMAIL PROTECTED]] Sent: Thursday, October 19, 2000 8:45 AM To: [EMAIL PROTECTED] Subject: Configuration help. Hi, I have 2621 router: 2 WAN links and 2 EtherPorts. I want to configure this for one-to-one basis. all tarffic comming from Fa0/0 goes S0/0 and traffic comming from Fa0/1 goes S0/1. How I can do this, Pls help TIA Gm _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]