draft-ietf-lisp-nat-traversal

NAT traversal for LISP

streamIETF grouplisp stateactive pages28 rev02 expires2026-09-25 canonicalhttps://datatracker.ietf.org/doc/draft-ietf-lisp-nat-traversal/

This document describes a mechanism for IPv4 NAT traversal for LISP tunnel routers (xTR) and LISP Mobile Nodes (LISP-MN) behind a Network Address Translator (NAT) device. A LISP device both detects the NAT and initializes its state. Forwarding to the LISP device through a NAT is enabled by the LISP Re-encapsulating Tunnel Router (RTR) network element, which acts as an anchor point in the data plane, forwarding traffic from unmodified LISP devices through the NAT.