I am opening new topic because the old one for my issue was unclearly explained.
OK, I have 2xT1 bundled in a PPP Multilink interface. Normally if one of this serial lines goes down the second has to keep the Multilink interface up but this is not the case in our network. When one of the lines goes down the OSPF between the Multilink interfaces on both sides is going down and I lose connection to the remote office for several seconds, then the adjacency comes back up. When the OSPF goes down all IP Phones reset which is unacceptable. These are the messages that I got in the router log:
Jan 20 16:39:49.170 EEST: %CONTROLLER-5-UPDOWN: Controller E1 0/1/1, changed state to down (LOF detected)
Jan 20 16:39:51.170 EEST: %CONTROLLER-5-UPDOWN: Controller E1 0/1/1, changed state to up
Jan 20 16:57:48.173 EEST: %OSPF-5-ADJCHG: Process 40, Nbr 192.168.x.x on Multilink1 from LOADING to FULL, Loading Done
A folk from the forum suggested âppp multilink minimum-links 1â command to be inserted under both multilink interfaces.
I worry about this LOF detected. What does it mean? What is the problem with this link?