Hi Guys, We found an odd thing. The connetion between the ATM switch and the cisco router were not talking the same link protocol.
We changed the conf. and now we can ping the interface even if one su-interface is down. Thanks to all. Silvia Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=62571&t=62502 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]