848 BigIron RX Series Configuration Guide53-1001986-01Configuration considerations27Configuration considerations• MBGP does not redistribute DVMRP routes. It redistributes static routes only.• You cannot redistribute MBGP routes into BGP4.• The BigIron RX supports 8192 multicast routes by default. You may need to increase themaximum number of multicast routes for MBGP. You can configure the device to support up to153,600 multicast routes.Configuring MBGP1. Optional – Set the maximum number of multicast routes supported by the BigIron RX.2. Enable MBGP by doing the following:• Enable PIM Sparse Mode (PIM SM) or PIM Dense Mode (PIM DM) globally and on theindividual Reverse Path Forwarding (RPF) interfaces. PIM must be running on the devicein order for the device to send multicast prefixes to other multicast routers.• Enable BGP4. If this is the first time you have configured BGP4 on this device, you alsoneed to specify the local AS number.3. Identify the neighboring MBGP routers.4. Optional – Configure an MBGP default route.5. Optional – Configure an IP multicast static route.6. Optional – Configure an MBGP aggregate address.7. Optional – Configure a route map to apply routing policy to multicast routes.8. Save the configuration changes to the startup-config file.Setting the maximum number of multicast routessupportedThe BigIron RX supports up 1024 – 153,600 multicast routes.NOTEThis procedure requires a software reload to place the change into effect.To increase the maximum number of multicast routes supported on the device, enter commandssuch as the following.BigIron RX(config)# system-max multicast-route 12000BigIron RX(config)# write memoryBigIron RX(config)# endBigIron RX# reloadThese 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.
