Simple Virtual Aggregation (S-VA)

The information below is for an old version of the document
Document Type Expired Internet-Draft (grow WG)
Last updated 2012-04-26 (latest revision 2011-09-15)
Stream IETF
Intended RFC status Informational
Expired & archived
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Stream WG state WG Document
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IESG IESG state Expired (IESG: Dead)
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Responsible AD Ron Bonica
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The continued growth in the Default Free Routing Table (DFRT) stresses the global routing system in a number of ways. One of the most costly stresses is FIB size: ISPs often must upgrade router hardware simply because the FIB has run out of space, and router vendors must design routers that have adequate FIB. FIB suppression is an approach to relieving stress on the FIB by NOT loading selected RIB entries into the FIB. Simple Virtual Aggregation (S-VA) is a simple form of Virtual Aggregation (VA) that allows any and all edge routers to shrink their RIB and FIB requirements substantially and therefore increase their useful lifetime. S-VA does not increase FIB requirements for core routers. S-VA is extremely easy to configure considerably more so than the various tricks done today to extend the life of edge routers. S-VA can be deployed autonomously by an ISP (cooperation between ISPs is not required), and can co-exist with legacy routers in the ISP.


Robert Raszuk (
Alton Lo (
Lixia Zhang (
Xiaohu Xu (

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