We have 7604 running with c7600s72033-advipservicesk9-mz.122-33.SRB3.bin. 7604 is running multilink bundling multiple E1's to other routers. We are running OSPF and MPLS over the multilink. The problem we are facing is if any one of the individual E1's reliability is going down we are observing the entire multilink's reliability is going down and the OSPF is stuck in EXSTART state. If we remove that problematic link from multilink everything is normal.
Would like to know this problem is related to any IOS bug in 7604. Also is there any configuration options that if the reliability of any E1's is exceeding a threshold we will exclude that link out of multilink and it will be included into multilink once the reliability is fine?
Thanks in advance.