1 Use of PE-PE IP/GRE/IPsec for MPLS PWs draft-raggarwa-pwe3-pw-over-ip- 00.txt Rahul Aggarwal

2 Authors  Rahul Aggarwal (Juniper)  Kireeti Kompella (Juniper)

Agenda  Problem statement  Motivation  Specification  Relevance to the PWE3 WG  Conclusion 3.

Problem Statement  Carrying MPLS PW packets over IP, GRE or IPsec tunnels MPLS control plane for PW setup Outer PSN tunnel encapsulation is now IP, GRE or IPsec PW label identifies the PW  Enable MPLS PWs to be transported over non- MPLS networks 4.

Motivation  Non-MPLS routers between the ingress and egress PEs  IPsec authentication and/or encryption for increased security Protection against spoofed packets Protection against transit node misbehavior Encryption of the PW data 5.

Specification  Continue to use MPLS to identify a PW A single label stack i.e. PW label  A MPLS-in-IP or MPLS-in-GRE encapsulation used to turn the packet into an IP packet Dynamic IP or GRE tunnel between ingress PE and egress PE MPLS PW packet gets sent over an IP or GRE tunnel  IPsec Transport mode may be used to secure the IP or GRE tunnel 6.

MPLS-in-IP/MPLS-in-GRE encapsulation by ingress PE  PW “route” points to a PW label and a next-hop  The next-hop results in MPLS-in-IP or MPLS-in-GRE encapsulation IP source address: address of the ingress PE IP destination address: address of the egress PE  The IP/GRE tunnels are not preconfigured 7.

Application of IPsec by Ingress PE  Ingress PE needs to establish an IPsec SA with the egress PE  IKE may be needed for key distribution  IPsec procedures result in a packet with an IP header, followed by an IPsec header followed by MPLS-in-IP/MPLS-in-GRE encapsulation 8

Procedures at the Egress PE  Egress PE should be able to de-capsulate MPLS-in- IP or MPLS-in-GRE packets MPLS PW packets then MPLS switched  For IPsec IKE and SAs Apply IPsec procedures to the incoming IPsec packet Recover the contained MPLS-in-IP/MPLS-in-GRE packet 9

Relevance to the PWE3 WG  MPLS PWs over IP networks are in the charter  This document describes procedures for carrying MPLS PWs over IP/GRE/IPsec tunnels  Meets requirements not met by existing specifications  Does not concern itself with IP/GRE/IPsec PSN setup 10

Conclusion  Request to be a WG document  pwe3-pw-over-ip-00.txt 11

Thank You