draft-ietf-mpls-ldp-mrt-02.txt   draft-ietf-mpls-ldp-mrt-03.txt 
MPLS Working Group A. Atlas MPLS Working Group A. Atlas
Internet-Draft K. Tiruveedhula Internet-Draft K. Tiruveedhula
Intended status: Standards Track C. Bowers Intended status: Standards Track C. Bowers
Expires: April 2, 2016 Juniper Networks Expires: November 19, 2016 Juniper Networks
J. Tantsura J. Tantsura
Ericsson Individual
IJ. Wijnands IJ. Wijnands
Cisco Systems, Inc. Cisco Systems, Inc.
September 30, 2015 May 18, 2016
LDP Extensions to Support Maximally Redundant Trees LDP Extensions to Support Maximally Redundant Trees
draft-ietf-mpls-ldp-mrt-02 draft-ietf-mpls-ldp-mrt-03
Abstract Abstract
This document specifies extensions to the Label Distribution This document specifies extensions to the Label Distribution
Protocol(LDP) to support the creation of label-switched paths for Protocol(LDP) to support the creation of label-switched paths for
Maximally Redundant Trees (MRT). A prime use of MRTs is for unicast Maximally Redundant Trees (MRT). A prime use of MRTs is for unicast
and multicast IP/LDP Fast-Reroute, which we will refer to as MRT-FRR. and multicast IP/LDP Fast-Reroute, which we will refer to as MRT-FRR.
The sole protocol extension to LDP is simply the ability to advertise The sole protocol extension to LDP is simply the ability to advertise
an MRT Capability. This document describes that extension and the an MRT Capability. This document describes that extension and the
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Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/. Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
This Internet-Draft will expire on April 2, 2016. This Internet-Draft will expire on November 19, 2016.
Copyright Notice Copyright Notice
Copyright (c) 2015 IETF Trust and the persons identified as the Copyright (c) 2016 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of (http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as the Trust Legal Provisions and are provided without warranty as
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propagate a label mapping for that Rainbow FEC. propagate a label mapping for that Rainbow FEC.
6. Security Considerations 6. Security Considerations
The labels distributed by the extensions in this document create The labels distributed by the extensions in this document create
additional forwarding paths that do not following shortest path additional forwarding paths that do not following shortest path
routes. The transit label swapping operations defining these routes. The transit label swapping operations defining these
alternative forwarding paths are created during normal operations alternative forwarding paths are created during normal operations
(before a failure occurs). Therefore, a malicious packet with an (before a failure occurs). Therefore, a malicious packet with an
appropriate label injected into the network from a compromised appropriate label injected into the network from a compromised
location would be forwarded to a destinations along a non-shortest location would be forwarded to a destination along a non-shortest
path. When this technology is deployed, a network security design path. When this technology is deployed, a network security design
should not rely on assumptions about potentially malicious traffic should not rely on assumptions about potentially malicious traffic
only following shortest paths. only following shortest paths.
It should be noted that the creation of non-shortest forwarding paths It should be noted that the creation of non-shortest forwarding paths
is not unique to MRT. is not unique to MRT.
7. Potential restrictions on MRT-related MT-ID values imposed by 7. Potential restrictions on MRT-related MT-ID values imposed by
RFC6420 RFC6420
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Email: kishoret@juniper.net Email: kishoret@juniper.net
Chris Bowers Chris Bowers
Juniper Networks Juniper Networks
1194 N. Mathilda Ave. 1194 N. Mathilda Ave.
Sunnyvale, CA 94089 Sunnyvale, CA 94089
USA USA
Email: cbowers@juniper.net Email: cbowers@juniper.net
Jeff Tantsura Jeff Tantsura
Ericsson Individual
300 Holger Way
San Jose, CA 95134
USA USA
Email: jeff.tantsura@ericsson.com Email: jefftant.ietf@gmail.com
IJsbrand Wijnands IJsbrand Wijnands
Cisco Systems, Inc. Cisco Systems, Inc.
Email: ice@cisco.com Email: ice@cisco.com
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