Hi,there: I connected router 2611's serial0/0 to 2501's serial1 with a DTE to DCE cable, and set clockrate ,keepalive,encap HDLC. But they could not work yet. Who can help me ? Thanks in advance... ___________________________________ UPDATED Posting Guidelines: http://www.groupstudy.com/list/guide.html FAQ, list archives, and subscription info: http://www.groupstudy.com Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]