Are you running any routing protocols over this T1 link? Even if the port doesnt fail the routing protocol would lose the neighbor and promote the ISDN route. You dont mention how time critical this is but surely hello/dead times could be adjusted for this. IMHO Dan Faulk CCNP (not a terminal condition just a temporary one) Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=17486&t=17486 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]