Proxy Ingress Tunnel Router (PITR)

A proxy ingress tunnel router receives traffic destined to a LISP end point identifier from non-LISP sites. Proxy ingress tunnel routers behave similarly to ingress tunnel routers. They resolve a mapping for the destination end point identifier to encapsulate and forward the traffic to the destination routing locator.

A proxy ingress tunnel router will send a map request to the mapping resolver even if the source of the traffic is not coming from a non-LISP site. This is different behaviour from a regular ingress tunnel router as inbound traffic is not checked whether the source is registered in the local map cache as an end point identifier before sending a map request message to the map resolver.



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