This is a weird situation. I have an 1841 with a VWIC-2MFT-T1 and a new HWIC-1DSU-T1. The site originally had 2 t-1s MLPPP bonded to an MPLS provider. a new t-1 was installed and we have installed the new HWIC. We tried to activate the circuit yesterday and got up/down on the new t-1. Carrier couldn't figure out why. We rebooted last night and the new T-1 came online and the old T-1s were down. The new T-1 was up and mostly working (could ping across but no BGP neighbor relationship) Multilink Interface was online. As soon as I shut down the new t-1 old t-1s came online, bgp came online and all was working again.
Question is, is there a compatibily issue with the two WICs i have listed not being able to all join a MLPPP bundle?
Or has anyone seen a situation like the above?