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!
router bgp 200
neighbor 5.0.0.1 remote-as 200
/*RTA IBGP*/
network 15.0.0.0/8
!
ip route 15.0.0.0 255.0.0.0 5.0.0.12
8. BGP AS Confederation Example
The following is a configuration of Autonomous System Confederation. RTA, RTB and RTC are in IBGP
connections and belong to private AS 65010. RTE belongs to private AS 65020. RTE builds interior
EBGP connection with RTA in AS confederation. AS65010 and AS65020 buildup an AS confederation
whose number is AS200. RTD belongs to Autonomous System AS100. RTD builds EBGP connection
with AS200 through RTA.
1. RTA configuration:
interface s1/0
ip address 1.0.0.1 255.0.0.0
!
interface s1/1
ip address 2.0.0.1 255.0.0.0
!
interface s1/2
ip address 4.0.0.1 255.0.0.0
!
interface s1/3
ip address 5.0.0.1 255.0.0.0
!
router bgp 65010
bgp confederation identifier 200
bgp confederation peers 65020
neighbor 1.0.0.2 remote-as 65010 /*RTB IBGP*/
neighbor 2.0.0.2 remote-as 65010 /*RTC IBGP*/
neighbor 5.0.0.2 remote-as 65020 /*RTE EBGP*/
neighbor 4.0.0.2 remote-as 100
/*RTD EBGP*/
2.RTB configuration:
interface s1/0
ip address 1.0.0.2 255.0.0.0
!
interface s1/1
ip address 3.0.0.1 255.0.0.0
!
router bgp 65010
bgp confederation identifier 200
bgp confederation peers 65020
neighbor 1.0.0.1 remote-as 65010 /*RTA IBGP*/
neighbor 3.0.0.2 remote-as 65010 /*RTC IBGP*/
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