When a T-1 in a Multi-link bundle goes down, then comes back up, the T-1
fails to become active in the bundle (stays inactive_ unless I remove the
PPP multi-link statements on the T-1 at both end and then re-apply them. All
routers are running IOS 12.2(7) accross multiple pathform, Cisco 7206VXR,
Cisco 2621, and Cisco 3660.