< draft-li-isis-mrt-01.txt   draft-li-isis-mrt-02.txt >
Network Working Group Z. Li Network Working Group Z. Li
Internet-Draft N. Wu Internet-Draft N. Wu
Intended status: Standards Track Q. Zhao Intended status: Standards Track Q. Zhao
Expires: January 5, 2015 Huawei Technologies Expires: July 20, 2015 Huawei Technologies
A. Atlas A. Atlas
C. Bowers C. Bowers
Juniper Networks Juniper Networks
J. Tantsura J. Tantsura
Ericsson Ericsson
July 4, 2014 January 16, 2015
Intermediate System to Intermediate System (IS-IS) Extensions for Intermediate System to Intermediate System (IS-IS) Extensions for
Maximally Redundant Trees (MRT) Maximally Redundant Trees (MRT)
draft-li-isis-mrt-01 draft-li-isis-mrt-02
Abstract Abstract
This document describes necessary extensions to IS-IS to support the This document describes necessary extensions to IS-IS to support the
distributed computation of Maximally Redundant Trees (MRT). Some distributed computation of Maximally Redundant Trees (MRT). Some
example uses of the MRTs include IP/LDP Fast-Reroute and global example uses of the MRTs include IP/LDP Fast-Reroute and global
protection or live-live for multicast traffic. The extensions protection or live-live for multicast traffic. The extensions
indicate what MRT profile(s) each router supports. Different MRT indicate what MRT profile(s) each router supports. Different MRT
profiles can be defined to support different uses and to allow profiles can be defined to support different uses and to allow
transition of capabilities. An extension is introduced to flood MRT- transition of capabilities. An extension is introduced to flood MRT-
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This Internet-Draft will expire on January 5, 2015. This Internet-Draft will expire on July 20, 2015.
Copyright Notice Copyright Notice
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MRT-Red LDP MT-ID (2 octet) MRT-Red LDP MT-ID (2 octet)
MRT-Blue LDP MT-ID (2 octet) MRT-Blue LDP MT-ID (2 octet)
+--------------------------------+ +--------------------------------+
|R |R |R |R | MT ID | 2 |R |R |R |R | MT ID | 2
+----------------+---------------+ +----------------+---------------+
| Profile ID | 1 | Profile ID | 1
+----------------+ +----------------+
| GADAG Priority | 1 | GADAG Priority | 1
+----------------+---------------+ +----------------+---------------+
| MRT-Red LDP MT-ID | 2 | MRT-Red LDP MT-ID | 2
+--------------------------------+ +--------------------------------+
| MRT-Blue LDP MT-ID | 2 | MRT-Blue LDP MT-ID | 2
+--------------------------------+ +--------------------------------+
12-bit MT ID represents the base MT topology which MRT computation is 12-bit MT ID represents the base MT topology which MRT computation is
based on. Profile ID represents the MRT profile this router supports based on. Profile ID represents the MRT profile this router supports
and GADAG Root Selection Priority is the priority for root selection. and GADAG Root Selection Priority is the priority for root selection.
The range of this priority is [0, 255] with 128 as the default value. The range of this priority is [0, 255] with 128 as the default value.
The GADAG Root Selection Policy defined as part of a given MRT The GADAG Root Selection Policy defined as part of a given MRT
profile determine how the GADAG Root Selection Priority value is profile determine how the GADAG Root Selection Priority value is
used. used.
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