D-Link DGS-3630 Emulator 1 - Page 184

DGS-3630 Layer 3 Stackable Managed Switch CLI Reference Guide Example This example shows how to enter the VPN4 address family and activate a BGP peer. Switch# configure terminal Switch(config)# router bgp 120 Switch(config-router)# address-family vpnv4 Switch(config-router-af)# neighbor 10.2.2.5 activate Switch(config-router-af)# neighbor 10.2.2.5 send-community extended Switch(config-router-af)# 13-5 aggregate-address (MI and EI Mode Only) This command is used to create a BGP aggregated route. Use the no form of this command to remove the aggregated route. aggregate-address NETWORK-NUMBER/SUBNET-LENGTH [summary-only] [as-set] no aggregate-address NETWORK-NUMBER/SUBNET-LENGTH Parameters NETWORK-NUMBER/ SUBNET-LENGTH summary-only as-set Specifies the network number and the length of the network that BGP will aggregate. The format of NETWORK-NUMBER/SUBNET-LENGTH can be 10.9.18.2/8. (Optional) Specifies to filter those routes that are more specific than the aggregated route. (Optional) Specifies to generate autonomous system set path information. Default By default, this option is disabled. Command Mode Router Configuration Mode. Address Family Configuration Mode (IPv4 Unicast, IPv4 Multicast, IPv6 Unicast, and VRF). Command Default Level Level: 12. Usage Guideline Route aggregation is a mechanism used to reduce the number of routing entries. Use the aggregate command to create an aggregate entry. The aggregated route will be created in the routing table if there is any more specific route entry than the aggregated route and the characteristic of the aggregated route is the combined characteristic of the more specific routes. The aggregated route is sent as coming from the local AS. The atomic aggregation flag is set to indicate that the AS path information of the more specific route information might be lost from the aggregated entry. If the summary-only option is not specified, the aggregated route, together with its more specific routes, is advertised. If specified, the more specific routes are not advertised. When the as-set option is specified, the AS number information of those more-specific routes will be put in the AS set attribute of the aggregated route entry. An AS number is only listed once in the AS set even though it appear in the AS path of multiple paths. The atomic aggregator flag of the aggregated route entry is off to inform the neighbor that the AS path information of the aggregated path is not lost. 179