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A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Signaling Tunnel Encapsulation/Deencapsulation
Author(s) : R. Aggarwal et al.
Filename : draft-raggarwa-ppvpn-tunnel-encap-sig-00.txt
Pages : 9
Date : 2003-2-24
This document proposes a lightweight mechanism for signaling a PE
router's tunnel encapsulation capabilities. One example is its
capability to encapsulate MPLS using dynamic GRE and/or IP. This is
applicable when a MPLS packet is tunneled using dynamic GRE and/or
IP encapsulation [MPLS-IP-GRE] between PE routers. For instance the
MPLS packet may be a 2547 based MPLS VPN packet [2547bis], a layer 2
packet transported using MPLS [MARTINI], a MPLS tunneled IPv6 packet
or a MPLS IPv6 VPN packet [BGP-VPN-IPv6]. Adding such a mechanism has
several benefits. It helps in blackhole avoidance and eases
transitioning from MPLS tunneling based Layer 3/Layer 2 VPNs to GRE/IP
tunneling based Layer 3/Layer 2 VPNs (and vice versa). Such a mechanism
is needed where a network may be using MPLS and GRE (or IP) for
tunneling, simultaneously in different parts of the network. It can
help in encapsulation selection when multiple tunneling technologies
are supported. It can also be used to facilitate the use of security
mechanisms in the network backbone.
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