Wonder if anybody could help me out here, I have two 1721's connected to the serials via frame relay, I want to be able to use ISDN dial back up for when either serial links goes down, the problem that I'm having is if only one serial goes down I can not get a dial up connection up because the far end is rejected with the complaint that the DDR is a back up interface, if I bring down both serial links then the dial up works fine, how can I get the far end to answer even if its serial is up
This is for my MPLS lab that I'm trying to set up
Thanks for any help you can offer