Ahmed, > Hello Devon My router is running out of warranty so i can't contact > TAC, what do you think about IOS upgrade ? Jared's original advice is sound and he knows his stuff. =) We recently got hit by bug CSCtx31177, causing our Sup720-3BXLs to reboot in our 7600 routers. We were running 15.2(2)S2 and are upgrading to 15.2(4)S2. -- Devon