380 CHAPTER 30: BGP CONFIGURATIONThe above two attributes are both optional non-transitive, so BGP speakers notsupporting multi-protocol ignore the two attributes and do not forward them topeers.Address familyMP-BGP employs address family to differentiate network layer protocols. Foraddress family values, refer to RFC 1700 (Assigned Numbers). Currently, thesystem supports multiple MP-BGP extensions, including IPv6 extension. Differentextensions are configured in respective address family view.n ■ For information about the IPv6 extension application, refer to “IPv6 BGPConfiguration” on page 467.■ This chapter gives no detailed commands related to any specific extensionapplication in MP-BGP address family view.Protocols and Standards ■ RFC1771: A Border Gateway Protocol 4 (BGP-4)■ RFC2858: Multiprotocol Extensions for BGP-4■ RFC3392: Capabilities Advertisement with BGP-4■ RFC2918: Route Refresh Capability for BGP-4■ RFC2439: BGP Route Flap Damping■ RFC1997: BGP Communities Attribute■ RFC2796: BGP Route Reflection■ RFC3065: Autonomous System Confederations for BGP■ draft-ietf-idr-restart-08: Graceful Restart Mechanism for BGPBGP ConfigurationTask ListComplete the following tasks to configure BGP:Task Remarks“Configuring BGP Basic Functions” on page 381 Required“Controlling Route Distribution andReception” on page 383“Configuring BGP RouteRedistribution” on page 383Optional“Configuring BGP RouteSummarization” on page 383Optional“Advertising a Default Route to a Peeror Peer Group” on page 384Optional“Configuring BGP Route DistributionFiltering Policies” on page 384Optional“Configuring BGP Route ReceptionFiltering Policies” on page 385Optional“Enabling BGP and IGP RouteSynchronization” on page 386Optional“Configuring BGP Route Dampening”on page 386Optional“Configuring BGP Route Attributes” on page 386 Required“Tuning and Optimizing BGP Networks” on page 388 Required
