1024 PowerConnect B-Series FCX Configuration Guide53-1002266-01Optional configuration tasks30Commands for router CPowerConnectC(config)#router bgpPowerConnectC(config-bgp-router)#local-as 64513PowerConnectC(config-bgp-router)#confederation identifier 10PowerConnectC(config-bgp-router)#confederation peers 64512 64513PowerConnectC(config-bgp-router)#write memoryCommands for router DPowerConnectD(config)#router bgpPowerConnectD(config-bgp-router)#local-as 64513PowerConnectD(config-bgp-router)#confederation identifier 10PowerConnectD(config-bgp-router)#confederation peers 64512 64513PowerConnectD(config-bgp-router)#write memoryAggregating routes advertised to BGP4 neighborsBy default, the Layer 3 Switch advertises individual routes for all the networks. The aggregationfeature allows you to configure the Layer 3 Switch to aggregate routes in a range of networks into asingle CIDR number. For example, without aggregation, the Layer 3 Switch will individually advertiseroutes for networks 207.95.1.0, 207.95.2.0, and 207.95.3.0. You can configure the Layer 3 Switchto instead send a single, aggregate route for the networks. The aggregate route would beadvertised as 207.95.0.0.NOTETo summarize CIDR networks, you must use the aggregation feature. The auto summary featuredoes not summarize networks that use CIDR numbers instead of class A, B, or C numbers.To aggregate routes for 209.157.22.0, 209.157.23.0, and 209.157.24.0, enter the followingcommand.PowerConnect(config-bgp-router)#aggregate-address 209.157.0.0 255.255.0.0Syntax: aggregate-address [as-set] [nlri multicast | unicast | multicastunicast][summary-only] [suppress-map ] [advertise-map ][attribute-map ]The and parameters specify the aggregate value for the networks. Specify 0for the host portion and for the network portion that differs among the networks in the aggregate.For example, to aggregate 10.0.1.0, 10.0.2.0, and 10.0.3.0, enter the IP address 10.0.0.0 and thenetwork mask 255.255.0.0.The as-set parameter causes the router to aggregate AS-path information for all the routes in theaggregate address into a single AS-path.The nlri multicast | unicast | multicast unicast parameter specifies whether the neighbor is amulticast neighbor or a unicast neighbor. Optionally, you also can specify unicast if you want theLayer 3 Switch to exchange unicast (BGP4) routes as well as multicast routes with the neighbor.The default is unicast only.The summary-only parameter prevents the router from advertising more specific routes containedwithin the aggregate route.The suppress-map parameter prevents the more specific routes contained in thespecified route map from being advertised.
