draft-ietf-idr-aigp-08.txt   draft-ietf-idr-aigp-09.txt 
Network Working Group Pradosh Mohapatra Network Working Group Pradosh Mohapatra
Internet Draft Rex Fernando Internet Draft Rex Fernando
Intended Status: Proposed Standard Eric C. Rosen Intended Status: Proposed Standard Eric C. Rosen
Expires: December 4, 2012 Cisco Systems, Inc. Expires: May 27, 2013 Cisco Systems, Inc.
James Uttaro James Uttaro
ATT ATT
June 4, 2012 November 27, 2012
The Accumulated IGP Metric Attribute for BGP The Accumulated IGP Metric Attribute for BGP
draft-ietf-idr-aigp-08.txt draft-ietf-idr-aigp-09.txt
Abstract Abstract
Routing protocols that have been designed to run within a single Routing protocols that have been designed to run within a single
administrative domain ("IGPs") generally do so by assigning a metric administrative domain ("IGPs") generally do so by assigning a metric
to each link, and then choosing as the installed path between two to each link, and then choosing as the installed path between two
nodes the path for which the total distance (sum of the metric of nodes the path for which the total distance (sum of the metric of
each link along the path) is minimized. BGP, designed to provide each link along the path) is minimized. BGP, designed to provide
routing over a large number of independent administrative domains routing over a large number of independent administrative domains
("autonomous systems"), does not make its path selection decisions ("autonomous systems"), does not make its path selection decisions
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