http://www.rfc-editor.org/rfc/rfc4724.txt
RFC 4724: Graceful Restart Mechanism for BGP, S. Sangli, E. Chen, R. Fernando, J. Scudder, Y. Rekhter2007-01-01T23:00:00-00:00The mechanisms described in this document are applicable to all routers, both those with the ability to preserve forwarding state during BGP restart and those without (although the latter need to implement only a subset of the mechanisms described in this document). [STANDARDS-TRACK]