[rfc-dist] RFC 6769 on Simple Virtual Aggregation (S-VA)

rfc-editor at rfc-editor.org rfc-editor at rfc-editor.org
Wed Oct 24 15:46:16 PDT 2012

A new Request for Comments is now available in online RFC libraries.

        RFC 6769

        Title:      Simple Virtual Aggregation (S-VA) 
        Author:     R. Raszuk, J. Heitz,
                    A. Lo, L. Zhang, X. Xu
        Status:     Informational
        Stream:     IETF
        Date:       October 2012
        Mailbox:    robert at raszuk.net, 
                    jakob.heitz at ericsson.com, 
                    altonlo at aristanetworks.com,
                    lixia at cs.ucla.edu, 
                    xuxh at huawei.com
        Pages:      8
        Characters: 16565
        Updates/Obsoletes/SeeAlso:   None

        I-D Tag:    draft-ietf-grow-simple-va-12.txt

        URL:        http://www.rfc-editor.org/rfc/rfc6769.txt

All BGP routers in the Default-Free Zone (DFZ) are required to carry
all routes in the Default-Free Routing Table (DFRT).  This document
describes a technique, Simple Virtual Aggregation (S-VA), that allows
some BGP routers not to install all of those routes into the 
Forwarding Information Base (FIB).

Some routers in an Autonomous System (AS) announce an aggregate (the
VA prefix) in addition to the routes they already announce.  This
enables other routers not to install the routes covered by the VA
prefix into the FIB as long as those routes have the same next-hop as
the VA prefix.

The VA prefixes that are announced within an AS are not announced to
any other AS.  The described functionality is of very low operational
complexity, as it proposes a confined BGP speaker solution without
any dependency on network-wide configuration or requirement for any
form of intra-domain tunneling.  This document is not an Internet Standards Track specification; it is published for informational 

This document is a product of the Global Routing Operations Working Group of the IETF.

INFORMATIONAL: This memo provides information for the Internet community.
It does not specify an Internet standard of any kind. Distribution of
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