Configuration examples

XXXX - your ASN number

192.168.0/24 and 192.168.1/24 - your IPv4 prefixes

2001:DB8:1::/64 and network 2001:DB8:2::/64 - your IPv6 prefixes

Cisco

router bgp XXXX
!
no bgp enforce-first-as
bgp log-neighbor-changes
neighbor LL-IX peer-group
neighbor LL-IX remote-as 59947
neighbor LL-IX transport connection-mode active

neighbor LL-IX-6 peer-group
neighbor LL-IX-6 remote-as 59947
neighbor LL-IX-6 transport connection-mode active

neighbor 5.101.92.3 peer-group LL-IX
neighbor 5.101.92.3 description rs1-ro.ll-ix.com
neighbor 5.101.92.4 peer-group LL-IX
neighbor 5.101.92.4 description rs2-ro.ll-ix.com
neighbor 2001:678:4fc::3 peer-group LL-IX-6
neighbor 2001:678:4fc::3 description rs1-ro.ll-ix.com
neighbor 2001:678:4fc::4 peer-group LL-IX-6
neighbor 2001:678:4fc::4 description rs2-ro.ll-ix.com
!
address-family ipv4
no neighbor LL-IX-6 activate
neighbor LL-IX activate
neighbor LL-IX next-hop-self
neighbor LL-IX soft-reconfiguration inbound
neighbor LL-IX route-map TO-IX out
no auto-summary
no synchronization
neighbor 5.101.92.3 peer-group LL-IX
neighbor 5.101.92.3 peer-group LL-IX
network 192.168.0.0 mask 255.255.255.0
network 192.168.1.0 mask 255.255.255.0
exit-address-family
!
address-family ipv6
neighbor LL-IX-6 activate
neighbor LL-IX-6 next-hop-self
neighbor LL-IX-6 soft-reconfiguration inbound
neighbor LL-IX-6 route-map TO-IX out
neighbor 2001:678:4fc::3 peer-group LL-IX-6
neighbor 2001:678:4fc::4 peer-group LL-IX-6
network 2001:DB8:1::/64
network 2001:DB8:2::/64
exit-address-family
!
ip prefix-list TO-IX seq 10 permit 192.168.0.0/24
ip prefix-list TO-IX seq 20 permit 192.168.1.0/24
!
ipv6 prefix-list TO-IX seq 10 permit 2001:DB8:1::/64
ipv6 prefix-list TO-IX seq 20 permit 2001:DB8:2::/64
!
route-map TO-IX permit 10
match ip address prefix-list TO-IX
!
                

Juniper

admin@Juniper# show protocols bgp
group LL-IX {
    type external;
    log-updown;
    family inet {
        unicast;
    }
    export TO-IX;
    peer-as 59947;
    local-as XXXX;
    neighbor 5.101.92.3 {
        description rs1-ro.ll-ix.com;
    }
    neighbor 5.101.92.4 {
        description rs2-ro.ll-ix.com;
    }
}
group LL-IX-6 {
    type external;
    log-updown;
    family inet6 {
        unicast;
    }
    export TO-IX;
    peer-as 59947;
    local-as XXXX;
    neighbor 2001:678:4fc::3 {
        description rs1-ro.ll-ix.com;
    }
    neighbor 2001:678:4fc::4 {
        description rs2-ro.ll-ix.com;
    }
}


admin@Juniper# show policy-options
prefix-list TO-IX {
    192.168.0.0/24;
	192.168.1.0/24;
}
prefix-list TO-IX-6 {
    2001:db8:1::/64;
	2001:db8:1::/64;
}
policy-statement TO-IX {
    term 10 {
        from {
            prefix-list TO-IX;
        }
        then accept;
    }
    term 20 {
        from {
            prefix-list TO-IX-6;
        }
        then accept;
    }
    term 200 {
        then reject;
    }
}