768 BigIron RX Series Configuration Guide53-1001810-01Changing the maximum number of shared BGP4 paths26The parameter specifies the local AS number 1 – 65535. There is no default. AS numbers64512 – 65535 are the well-known private BGP4 AS numbers and are not advertised to theInternet community.Changing the maximum number of shared BGP4 pathsWhen IP load sharing is enabled, BGP4 can balance traffic to a specific destination across up toeight equal paths. You can set the maximum number of paths to a value from 1 – 8. The default is1.NOTEThe maximum number of BGP4 load sharing paths cannot be greater than the maximum number ofIP load sharing paths. To increase the maximum number of IP load sharing paths, use the ip loadsharing command at the global CONFIG level of the CLI or use the # of Paths field next toLoad Sharing on the IP configuration panel of the Web management interface.To change the maximum number of shared paths, enter commands such as the following.BigIron RX(config)# router bgpBigIron RX(config-bgp)# maximum-paths 4BigIron RX(config-bgp)# write memorySyntax: [no] maximum-paths The parameter specifies the maximum number of paths across which the BigIron RX canbalance traffic to a given BGP4 destination. You can change the maximum number of paths to avalue from 2 – 8. The default is 1.Treating missing MEDs as the worst MEDsBy default, the device favors a lower MED over a higher MED during MED comparison. Since thedevice assigns the value 0 to a route path’s MED if the MED value is missing, the default MEDcomparison results in the device favoring the route paths that are missing their MEDs.To change this behavior so that the device favors a route that has a MED over a route that ismissing its MED, enter the following command at the BGP4 configuration level of the CLI.BigIron RX(config-bgp)# med-missing-as-worstSyntax: [no] med-missing-as-worstNOTEThis command affects route selection only when route paths are selected based on MEDcomparison. It is still possible for a route path that is missing its MED to be selected based on othercriteria. For example, a route path with no MED can be selected if its weight is larger than theweights of the other route paths.
