BGP Graceful restart - RFC 4724

I am reading up on RFC 4724 - BGP Graceful restart for EOR marker.

http://tools.ietf.org/html/rfc4724

Appreciate if some one could clarify.
1. to configure on an ios router do you need to send extended community to
the peers or it ios router it should work with just bgp graceful-restart
under bgp process.
 2. with the bgp grceful restart whena peer sees tcp/179 reset from the
peer will it still have the routes from receiving peer in routing table or
just in the RIB and when it sees tcp/179 socket again it will install
routes from RIB in the FIB (routing table) rather then receiving all the
bgp RIB again from the peer.
3. If some one knows a good link from cco on this please let me know.

thanks in advance and regards

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Received on Thu Nov 29 2012 - 10:08:53 ART