Andrew, From what you say your remote end is working fine both in Tx and Rx and your Tx is working fine since remote end sees your cdp. Your Rx appears to be the problem. Have you tried swapping out your local Serial cable ? What about 'sh int serial xxx' to check your pins ? DCD RTS etc. regards, Phil. --- Andrew Larkins wrote: > HI all, > > Strange problem here. > > The serial interface are UP UP on both sides, but we > are not able to ping > each other - even though directly connected. A > "debug ip ICMP" on the > remote site shows the ping coming through and > replying, but the reply never > gets back. > Also the remote site saw my router using CDP, but I > do not see him. > > Any ideas?? > > I believe this is Telco related, but the line shows > clean from the interface > stats > > Andrew [EMAIL PROTECTED] ____________________________________________________________ Do You Yahoo!? Get your free @yahoo.co.uk address at http://mail.yahoo.co.uk or your free @yahoo.ie address at http://mail.yahoo.ie Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=12778&t=12778 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]