La confédération BGP permet de regrouper un ensemble d’AS (privé) en un seul AS (publique)
- confederation identifier
- confederation peers
Exemple :
R1#show ip bgp | be Net Network Next Hop Metric LocPrf Weight Path *> 1.0.0.0 0.0.0.0 0 32768 i *> 2.0.0.0 10.1.12.2 0 0 65522 i *> 3.0.0.0 10.1.12.2 0 65522 65534 i *> 4.0.0.0 10.1.12.2 0 65522 65534 i *> 5.0.0.0 10.1.12.2 0 65522 65534 500 i
R5#show ip bgp | be Net Network Next Hop Metric LocPrf Weight Path *> 1.0.0.0 10.1.45.4 0 65534 65522 65511 i *> 2.0.0.0 10.1.45.4 0 65534 65522 i *> 3.0.0.0 10.1.45.4 0 65534 i *> 4.0.0.0 10.1.45.4 0 0 65534 i *> 5.0.0.0 0.0.0.0 0 32768 i
Configuration de la confegaration de l’AS 100
R1#show run | be router bgp router bgp 65511 no synchronization bgp log-neighbor-changes bgp confederation identifier 100 bgp confederation peers 65522 network 1.0.0.0 neighbor 10.1.12.2 remote-as 65522 no auto-summary
R2#show run | be router bgp router bgp 65522 no synchronization bgp log-neighbor-changes bgp confederation identifier 100 bgp confederation peers 65511 65534 network 2.0.0.0 neighbor 10.1.12.1 remote-as 65511 neighbor 10.1.23.3 remote-as 65534 no auto-summary
R3#show run | be router bgp router bgp 65534 no synchronization bgp log-neighbor-changes bgp confederation identifier 100 bgp confederation peers 65522 network 3.0.0.0 neighbor 10.1.23.2 remote-as 65522 neighbor 10.1.34.4 remote-as 65534 no auto-summary
R4#show run | be router bgp router bgp 65534 no synchronization bgp log-neighbor-changes bgp confederation identifier 100 network 4.0.0.0 neighbor 10.1.34.3 remote-as 65534 neighbor 10.1.45.5 remote-as 500 no auto-summary
R5#show run | be router bgp router bgp 500 no synchronization bgp log-neighbor-changes network 5.0.0.0 neighbor 10.1.45.4 remote-as 100 no auto-summary
Vérifications :
R1#show ip bgp | be Net Network Next Hop Metric LocPrf Weight Path *> 1.0.0.0 0.0.0.0 0 32768 i *> 2.0.0.0 10.1.12.2 0 100 0 (65522) i * 3.0.0.0 10.1.23.3 0 100 0 (65522 65534) i *> 4.0.0.0 10.1.34.4 0 100 0 (65522 65534) i *> 5.0.0.0 10.1.45.5 0 100 0 (65522 65534) 500 i
R5#sh ip bgp | be Net Network Next Hop Metric LocPrf Weight Path *> 1.0.0.0 10.1.45.4 0 100 i *> 2.0.0.0 10.1.45.4 0 100 i *> 3.0.0.0 10.1.45.4 0 100 i *> 4.0.0.0 10.1.45.4 0 0 100 i *> 5.0.0.0 0.0.0.0 0 32768 i