FIB Suppression with Virtual Aggregation

Document Type Expired Internet-Draft (grow WG)
Authors Paul Francis  , Xiaohu Xu  , Hitesh Ballani  , Dan Jen  , Robert Raszuk  , Lixia Zhang 
Last updated 2015-10-14 (latest revision 2011-12-30)
Replaces draft-francis-intra-va
Stream Internet Engineering Task Force (IETF)
Intended RFC status Informational
Expired & archived
pdf htmlized bibtex
Stream WG state WG Document
Document shepherd No shepherd assigned
IESG IESG state Expired (IESG: Dead)
Action Holders
Consensus Boilerplate Unknown
Telechat date
Responsible AD Ron Bonica
IESG note Peter Schoenmaker <> is the document shepherd.
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


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. Virtual Aggregation (VA) allows ISPs to shrink the FIBs of any and all routers, easily by an order of magnitude with negligible increase in path length and load. FIB suppression can be deployed autonomously by an ISP without requiring cooperation between adjacent ISPs, and can co-exist with legacy routers in the ISP.


Paul Francis (
Xiaohu Xu (
Hitesh Ballani (
Dan Jen (
Robert Raszuk (
Lixia Zhang (

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