Netgear XCM8806 Chassis Hardware Installation Guide - Page 1078
con bgp add confederation-peer sub-AS-number
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NETGEAR 8800 Chassis Switch CLI Manual Before you can create an aggregate route, you must enable BGP aggregation using the following command: enable bgp aggregation BGP supports overlapping routes. For example, you can configure both of the following aggregate addresses: • 192.0.0.0/8 • 192.168.0.0/16 After you create an aggregate route, the aggregate route remains inactive until BGP receives a route with an IP address and mask that conforms to an aggregate route. When a conforming route is received, the aggregate route becomes active and is advertised to BGP neighbors. If the summary-only option is specified, only the aggregate route becomes active and is advertised. If the summary-only option is omitted, any conforming aggregate routes and the received route are advertised to BGP neighbors. Example The following command configures a BGP aggregate route: configure bgp add aggregate-address 192.1.1.4/30 configure bgp add confederation-peer sub-AS-number configure bgp add confederation-peer sub-AS-number Description Adds a sub-AS to a confederation. Syntax Description number Specifies a sub-AS number of the confederation. The range is 1 to 4294967295. Default N/A. Usage Guidelines Invoke this command multiple times to add multiple sub-ASs. IBGP requires networks to use a fully-meshed router configuration. This requirement does not scale well, especially when BGP is used as an interior gateway protocol. One way to reduce the size of a fully-meshed AS is to divide the AS into multiple sub-autonomous systems and group them into a routing confederation. Within the confederation, all BGP speakers in each sub-AS must be fully-meshed. The confederation is advertised to other networks as a single AS. 1078 | Chapter 25. BGP Commands