OSPF Extensions to Support Maximally Redundant Trees

Document Type Replaced Internet-Draft (individual)
Authors Alia Atlas  , Shraddha Hegde  , Chris Bowers  , Jeff Tantsura  , Zhenbin Li 
Last updated 2015-01-22 (latest revision 2014-07-21)
Replaced by draft-ietf-ospf-mrt
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document specifies extensions to OSPF to support the distributed computation of Maximally Redundant Trees (MRT). Some example uses of the MRTs include IP/LDP Fast-Reroute and global protection or live- live for multicast traffic. The extensions indicate what MRT profile(s) each router supports. Different MRT profiles can be defined to support different uses and to allow transitioning of capabilities. An extension is introduced to flood MRT-Ineligible links, due to administrative policy. The need for a mechanism to allow routers to advertise a worst-case FIB compute/install time is well understood for controlling convergence. This specification introduces the Controlled Convergence TLV to be carried in the Router Information LSA.


Alia Atlas (akatlas@juniper.net)
Shraddha Hegde (shraddha@juniper.net)
Chris Bowers (cbowers@juniper.net)
Jeff Tantsura (jeff.tantsura@ericsson.com)
Zhenbin Li (lizhenbin@huawei.com)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)