A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : FIB Suppression with Virtual Aggregation and Default Routes
Author(s) : P. Francis, et al.
Filename : draft-francis-idr-intra-va-01.txt
Pages : 33
Date : 2008-09-15
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. This document specifies two styles of FIB
suppression. Edge suppression (ES) allows ISPs that deploy a core-
edge topology to shrink the FIBs of their edge routers, including
those that interface to other ISPs and exchange the full DFRT.
Virtual Aggregation (VA) allows ISPs to shrink the FIBs of any and
all routers. Both styles may be deployed autonomously by an ISP
(cooperation between ISPs is not required), and can co-exist with
legacy routers in the ISP.
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