This document defines a new Outbound Router Filter (ORF) type for
BGP, termed "One-time Extended Community Outbound Route Filter",
which would allow a BGP speaker to send to its BGP peer a route
refresh request with a set of extended-community-based filters to
make the peer re-advertise only the specific routes matching the
filters to the speaker. This ORF-type enables a BGP speaker to
refresh some specific routes without requiring its peer to re-
advertise the whole Adj-RIB-Out, which makes the route refresh
operation more efficient and reduces the impact on network stability.
This filter does not change the outbound route filters on BGP peers
and should only be used for one-time filtering.