It's relatively easy. For example if you wanted to simulate a Frame Relay connection between the two routers via a DCE/DTE cable, you would configure your routers as stated below; Router 1 (the DCE end, provides clock at 64Kb, "clockrate 64000") -------- interface Serial1 no ip address encapsulation frame-relay clockrate 64000 no keepalive interface Serial1.1 point-to-point ip address 131.108.177.164 255.255.255.0 frame-relay interface-dlci 26 broadcast Router 2 -------- interface Serial0 no ip address encapsulation frame-relay no keepalive frame-relay intf-type dce interface Serial0.1 point-to-point ip address 131.108.177.166 255.255.255.0 frame-relay interface-dlci 26 broadcast -Thats it. Hope this helps. Damian Rizzo CCNA+ Security, CNE, MCP -----Original Message----- From: Mixa [mailto:[EMAIL PROTECTED]] Sent: Wednesday, February 28, 2001 1:24 PM To: [EMAIL PROTECTED] Subject: Help! Hello, I'm new to Cisco and just bought 2 2500Series routers to practice my CCNA. Could you please show me how to make 2 routers talk via a back to back cable? Thanks in advance! Mixa PS: I know I need to configure a DTE/DCE but I can't find where. _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]