Link was working fine with ip traffic and getting the proper load. But as soon as the l2tpv3 traffic was added customer won’t able to the add the more traffic on configured link. After deep analysis, we had seen the problem occured because of fragmentation issue which was being caused by l2tpv3 consequences router ip input was increasing drastically. The solution of the problem is either to set the path mtu or increase the mtu in the whole path.