Have you tried a different cable? How about swapping which end is DCE? In my home lab I had one bad cable that caused problems like this. Very annoying. In addition, I have a 2501 whose Serial1 interface can't be the DCE or it fails. I knew it was broken when I got it but as long as I make sure that interface is always DTE I'm okay.
John >>> "NetEng" 11/16/01 6:43:28 AM >>> I have a 2620 and a 2501 in a back to back configuration. I have set the clockrate @ 64000 and I have connectivity, however the line is flapping about every 45s. It only stays down for about 5s. Any ideas? Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=26476&t=26469 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]

