BGP confederations

Example

Figure: Confederation network diagram example shows a confederation network diagram example.

The following configuration displays the minimum BGP configuration for routers in sub-confederation AS 65001 described in Figure: Confederation network diagram example.

ALA-A
    config router 
        autonomous-system 65001
        confederation 100 members 65001 65002 65003
        bgp
            group confed1
                peer-as 65001
                neighbor 2.2.2.2
                exit
                neighbor 3.3.3.3
                exit
                neighbor 4.4.4.4
                exit
            exit
            group external_confed
                neighbor 5.5.5.5
                    peer-as 65002
                exit
                neighbor 9.9.9.9
                    peer-as 65003
                exit
            exit
        exit
    exit

ALA-D
    config router
        autonomous-system 65001
        confederation 100 members 65001 65002 65003
        bgp
            group confed1
                peer-as 65001
                neighbor 1.1.1.1
                exit
                neighbor 2.2.2.2
                exit
                neighbor 3.3.3.3
                exit
            exit
        exit
    exit

ROUTER 1
    config router
        autonomous-system 65003
        confederation 100 members 65001 65002 65003
        bgp
            group confed1
                peer-as 65001
                neighbor 1.1.1.1
                exit
                neighbor 5.5.5.5
                    peer-as 65002
                exit
            exit
        exit
    exit