A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : Signaling MPLS in IP or MPLS in GRE Encapsulation
Capability
Author(s) : R. Aggarwal, R. Raszuk
Filename : draft-raggarwa-ppvpn-mpls-ip-gre-sig-00.txt
Pages : 8
Date : 2002-12-2
This document proposes a lightweight mechanism for signaling a PE
router's capability to encapsulate MPLS using dynamic GRE and/or IP.
This is applicable when a MPLS packet is tunnelled using a 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] or a layer 2 packet transported using MPLS [MARTINI].
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, at the same time, in 2547
based or Layer 2 VPNs. It can help in encapsulation selection when
multiple tunneling technologies are supported. It can also be used to
enhance the security of the network backbone.
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