BigIron RX Series Configuration Guide 85753-1001810-01Configuring MBGP 27These commands increase the maximum number of multicast routes supported, save theconfiguration change to the startup-config file, and reload the software to place the change intoeffect.Syntax: [no] system-max multicast-route The parameter specifies the number of multicast routes and can be from 1024 – 153,600.Enabling MBGPTo enable MBGP4, you must enable PIM SM or DM and BGP4. Enter commands such as thefollowing.BigIron RX> enableBigIron RX# configure terminalBigIron RX(config)# router pimBigIron RX(config)# interface ethernet 1/1BigIron RX(config-if-1/1)# ip address 1.1.1.1/24BigIron RX(config-if-1/1)# ip pimBigIron RX(config-if-1/1)# exitBigIron RX(config)# router bgpBGP4: Please configure 'local-as' parameter in order to enable BGP4.BigIron RX(config-bgp)# local-as 10The commands in this example configure PIM DM globally and on port 1/1, then enable BGP4.Once you enable PIM DM or PIM SM both globally and on the individual RPF interfaces, and enableBGP4, support for MBGP is automatically enabled.Once MBGP is enabled, MBGP parameters are configured under the IPv4 multicast address family.Enter the following command to enter the IPv4 multicast address family level.BigIron RX(config-bgp)#address-family ipv4 multicastBigIron RX(config-bgp-ipv4m)#Syntax: address-family ipv4 multicastAdding MBGP neighborsTo add an MBGP neighbor, enter a command such as the following.BigIron RX(config-bgp-ipv4m)# neighbor 1.2.3.4 remote-as 44This command adds a router with IP address 1.2.3.4 as an MBGP neighbor.The remote-as 44 parameter specifies that the neighbor is in remote BGP4 AS 44. The device willexchange only multicast routes with the neighbor.NOTEIf the BigIron RX has multiple neighbors with similar attributes, you can simplify configuration byconfiguring a peer group, then adding individual neighbors to it. The configuration steps are similar,except you specify a peer group name instead of a neighbor IP address when configuring theneighbor parameters, then add individual neighbors to the peer group.The command is the same as the command for configuring a unicast BGP neighbor, except inMBGP, the command is entered in the IPv4 multicast address family level. Here is the full syntaxfor the neighbor command.
