draft-ietf-idr-bgp4-09.txt   draft-ietf-idr-bgp4-10.txt 
Network Working Group Y. Rekhter Network Working Group Y. Rekhter
INTERNET DRAFT cisco Systems INTERNET DRAFT cisco Systems
T. Li T. Li
Juniper Networks Procket Networks, Inc.
Editors Editors
A Border Gateway Protocol 4 (BGP-4) A Border Gateway Protocol 4 (BGP-4)
<draft-ietf-idr-bgp4-09.txt> <draft-ietf-idr-bgp4-10.txt>
Status of this Memo Status of this Memo
This document is an Internet-Draft and is in full conformance with This document is an Internet-Draft and is in full conformance with
all provisions of Section 10 of RFC2026. all provisions of Section 10 of RFC2026.
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF), its areas, and its working groups. Note that Task Force (IETF), its areas, and its working groups. Note that
other groups may also distribute working documents as Internet- other groups may also distribute working documents as Internet-
Drafts. Drafts.
skipping to change at page 40, line 36 skipping to change at page 40, line 36
a) Remove from consideration routes with less-preferred a) Remove from consideration routes with less-preferred
MULTI_EXIT_DISC attributes. MULTI_EXIT_DISC is only comparable MULTI_EXIT_DISC attributes. MULTI_EXIT_DISC is only comparable
between routes learned from the same neighboring AS. Routes which between routes learned from the same neighboring AS. Routes which
do not have the MULTI_EXIT_DISC attribute are considered to have do not have the MULTI_EXIT_DISC attribute are considered to have
the highest possible MULTI_EXIT_DISC value. the highest possible MULTI_EXIT_DISC value.
This is also described in the following procedure: This is also described in the following procedure:
for m = all routes still under consideration for m = all routes still under consideration
for n = all routes still under consideration for n = all routes still under consideration
if (neighborAS(m) == neighborAS(n)) and (MED(n) < if (neighborAS(m) == neighborAS(n)) and (MED(n) < MED(m))
MED(m))
remove route m from consideration remove route m from consideration
In the pseudo-code above, MED(n) is a function which returns the In the pseudo-code above, MED(n) is a function which returns the
value of route n's MULTI_EXIT_DISC attribute. If route n has no value of route n's MULTI_EXIT_DISC attribute. If route n has no
MULTI_EXIT_DISC attribute, the function returns the highest MULTI_EXIT_DISC attribute, the function returns the highest
possible MULTI_EXIT_DISC value, i.e. 2^32-1. possible MULTI_EXIT_DISC value, i.e. 2^32-1.
Similarly, neighborAS(n) is a function which returns the neighbor Similarly, neighborAS(n) is a function which returns the neighbor
AS from which the route was received. AS from which the route was received.
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Editors' Addresses Editors' Addresses
Yakov Rekhter Yakov Rekhter
cisco Systems, Inc. cisco Systems, Inc.
170 W. Tasman Dr. 170 W. Tasman Dr.
San Jose, CA 95134 San Jose, CA 95134
email: yakov@cisco.com email: yakov@cisco.com
Tony Li Tony Li
Juniper Networks, Inc. Procket Networks
385 Ravendale Dr. 3910 Freedom Circle, Ste. 102A
Mountain View, CA 94043 Santa Clara CA 95054
email: tli@juniper.net Email: tli@procket.com
 End of changes. 

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