Native-Forward

If LISP networks are to communicate with non-LISP networks, proxy routers can be used. These roles are called Proxy Ingress Tunnel Router (Proxy-ITR) and Proxy Egress Tunnel Router (Proxy-ETR). If a LISP router receives a negative response from the map resolver, i.e. there is no mapping between requested EID to a RLOC, the LISP router can either send the corresponding packets to a proxy xTR (Packet with LISP header) or via another local interface (package without LISP header).