Netgear XCM8806 Chassis User Manual - Page 710
Route Aggregation, Inactive Route Advertisement, by BGP
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NETGEAR 8800 User Manual enable ipforwarding vlan ed configure ospf add vlan ed area 0.0.0.0 enable ospf configure bgp as-number 65002 configure bgp routerid 192.1.1.13 configure bgp confederation-id 200 enable bgp create bgp neighbor 192.1.1.14 remote-AS-number 65002 enable bgp neighbor 192.1.1.14 Route Aggregation Route aggregation is the process of combining the characteristics of several routes so that they are advertised as a single route. Aggregation reduces the amount of information that a BGP speaker must store and exchange with other BGP speakers. Reducing the information that is stored and exchanged also reduces the size of the routing table. To enable BGP route aggregation, do the following: 1. Enable aggregation using the following command: enable bgp aggregation 2. Create an aggregate route using the following command: configure bgp add aggregate-address {address-family [ipv4-unicast | ipv4-multicast]} {as-match | as-set} {summary-only} {advertise-policy } {attribute-policy } Inactive Route Advertisement BGP inactive routes are defined as those routes that are rated best by BGP and not best in IP routing table. For example, an IGP route to the same destination may be best because it has a higher priority in the IP route table than the BGP best route. The default configuration of the XCM8800 software does not advertise BGP inactive routes to BGP neighbors. The default configuration (no BGP inactive route advertisement) is more consistent with data traffic forwarding. However, when advertisement of inactive BGP routes is enabled, BGP need not depend upon the route manager module to know whether a BGP route is active or not. This actually improves the performance of BGP processing and advertisement. To enable or disable BGP inactive route advertising, use the following commands: enable bgp {address-family [ipv4-unicast | ipv4-multicast]} advertise-inactive-route disable bgp {address-family [ipv4-unicast | ipv4-multicast]} advertise-inactive-route 710 | Chapter 26. BGP
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