BigIron RX Series Configuration Guide 111953-1001810-01Chapter45Configuring BGP4+In this chapter• Address family configuration level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1119• Configuring BGP4+ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1120• Clearing BGP4+ information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1128• Displaying BGP4+ information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1133Brocade’s implementation of IPv6 supports multi protocol BGP (MBGP) extensions, which allowIPv6 BGP (known as BGP4+) to distribute routing information for protocols such as IPv4 BGP. Thesupported protocols are identified by address families. The extensions allow a set of BGP4+ peersto exchange routing information for multiple address families and sub-address families.IPv6 MBGP functions similarly to IPv4 MBGP except for the following enhancements:• An IPv6 unicast address family and network layer reachability information (NLRI).• Next hop attributes that use IPv6 addresses.NOTEBrocade’s implementation of BGP4+ supports the advertising of routes among different addressfamilies. However, it supports BGP4+ unicast routes only; it does not currently support BGP4+multicast routes.This chapter describes the following:• The address family configuration level for BGP4+.• How to configure BGP4+.• How to clear various BGP information, statistics, and counters.• How to display BGP4+ information and statistics.Address family configuration levelBrocade’s implementation of BGP4+ includes a new configuration level: address family. For IPv6,Brocade currently supports the BGP4+ unicast address family configuration level only. (For IPv4,Brocade supports the BGP4 unicast and BGP4 multicast address family configuration levels.) Theswitch enters the BGP4+ unicast address family configuration level when you enter the followingcommand while at the global BGP configuration level.BigIron RX(config-bgp)# address-family ipv6 unicastBigIron RX(config-bgp-ipv6u)#The (config-bgp-ipv6u)# prompt indicates that you are at the BGP4+ unicast address familyconfiguration level.
