BigIron RX Series Configuration Guide 70353-1002253-01Configuring OSPF 25Changing the reference bandwidthTo change the reference bandwidth, enter a command such as the following at the OSPFconfiguration level of the CLI:BigIron RX(config-ospf-router)# auto-cost reference-bandwidth 500The reference bandwidth specified in this example results in the following costs:• 10 Mbps port’s cost = 500/10 = 50• 100 Mbps port’s cost = 500/100 = 5• 1000 Mbps port’s cost = 500/1000 = 0.5, which is rounded up to 1The costs for 10 Mbps and 100 Mbps ports change as a result of the changed referencebandwidth. Costs for higher-speed interfaces remain the same.Syntax: [no] auto-cost reference-bandwidth The parameter specifies the reference bandwidth and can be a value from 1 – 4294967.The default is 100.To restore the reference bandwidth to its default value and thus restore the default costs ofinterfaces to their default values, enter the following command.BigIron RX(config-ospf-router)# no auto-cost reference-bandwidthDefine redistribution filtersRoute redistribution imports and translates different protocol routes into a specified protocol type.On the BigIron RX, redistribution is supported for static routes, ISIS, OSPF, RIP, and BGP4. OSPFredistribution supports the import of static, ISIS, RIP, and BGP4 routes into OSPF routes.NOTEThe BigIron RX advertises the default route into OSPF even if redistribution is not enabled, and evenif the default route is learned through an IBGP neighbor. IBGP routes (including the default route)are not redistributed into OSPF by OSPF redistribution (for example, by the OSPF redistributecommand).In Figure 107 on page 704, an administrator wants to configure the BigIron RX acting as the ASBR(Autonomous System Boundary Router) between the RIP domain and the OSPF domain toredistribute routes between the two domains.NOTEThe ASBR must be running both RIP and OSPF protocols to support this activity.
