Skip to main content

FIB Suppression with Virtual Aggregation

Document Type Expired Internet-Draft (grow WG)
Expired & archived
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
RFC stream Internet Engineering Task Force (IETF)
Intended RFC status Informational
Additional resources Mailing list discussion
Stream WG state WG Document
Document shepherd (None)
IESG IESG state Expired (IESG: Dead)
Action Holders
Consensus boilerplate Unknown
Telechat date (None)
Responsible AD Ron Bonica
IESG note Peter Schoenmaker <> is the document shepherd.
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


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.)