mpls/vpls problem

hi frnds

i have configuring p2p link with 711 5hnd using mpls/vpls protocol… everything works fine but suddenly link goes down and gives RTO** but after some ROT link works after 7 to 8 RTO …


so what is the problem Can any body help me in this regards … and one thing i have not configured loopback address on both routers

thanks and regards


suraj

any comments plz