No Route-reflector was used due to the relatively small number of core routers. Instead full mesh BGP peering was configured inside the core. BGP peerings were secured with TCP MD5 authentication from the beginning to prevent the wrong peering by accident. The external peers were grouped together to have same routing policy internally, with the groupname: 6NET_INTERNAL_NREN_PEER The Next-hop-self functionality was not used in the 6NET rollout. The initial next-hop attribute checking of the NLRI was based on the IPv6 address from the NREN to which 6NET was peering.