BGP Weight
R1
R1(config)#int g1/0
R1(config-if)#ip add 12.12.12.1 255.255.255.0
R1(config-if)#no sh
R1(config)#int g2/0
R1(config-if)#ip add 13.13.13.1 255.255.255.0
R1(config-if)#no sh
R1(config)#int lo0
R1(config-if)#ip add 1.1.1.1 255.255.255.255
R1(config-if)#router bgp 1
R1(config-router)#neighbor 12.12.12.2 remote-as 23
R1(config-router)#neighbor 13.13.13.3 remote-as 23
R1(config-router)#net 1.1.1.1 mask 255.255.255.255
R2
R2(config)#int g2/0
R2(config-if)#ip add 12.12.12.2 255.255.255.0
R2(config-if)#no sh
R2(config-if)#int f0/0
R2(config-if)#ip add 23.23.23.2 255.255.255.0
R2(config-if)#no sh
R2(config-if)#int g1/0
R2(config-if)#ip add 24.24.24.2 255.255.255.0
R2(config-if)#no sh
R2(config)#int lo0
R2(config-if)#ip add 2.2.2.2 255.255.255.255
R2(config-if)#router bgp 23
R2(config-router)#neighbor 12.12.12.1 remote-as 1
R2(config-router)#neighbor 23.23.23.3 remote-as 23
R2(config-router)#neighbor 24.24.24.4 remote-as 4
R2(config-router)#net 2.2.2.2 mask 255.255.255.25
R2(config-router)#neighbor 23.23.23.3 next-hop-self
R3
R3(config)#int g1/0
R3(config-if)#ip add 13.13.13.3 255.255.255.0
R3(config-if)#no sh
R3(config)#int f0/0
R3(config-if)#ip add 23.23.23.3 255.255.255.0
R3(config-if)#no sh
R3(config-if)#exit
R3(config)#int g2/0
R3(config-if)#ip add 34.34.34.3 255.255.255.0
R3(config-if)#no sh
R3(config)#router bgp 23
R3(config-router)#neighbor 13.13.13.1 remote-as 1
R3(config-router)#neighbor 23.23.23.2 remote-as 23
R3(config-router)#neighbor 34.34.34.4 remote-as 4
R3(config-router)#neighbor 23.23.23.2 next-hop-self
R4
R4(config)#int g1/0
R4(config-if)#ip add 24.24.24.4 255.255.255.0
R4(config-if)#no sh
R4(config)#int g2/0
R4(config-if)#ip add 34.34.34.4 255.255.255.0
R4(config-if)#no sh
R4(config)#int lo0
R4(config-if)#ip add 4.4.4.4 255.255.255.255
R4(config)#router bgp 4
R4(config-router)#neighbor 24.24.24.2 remote-as 23
R4(config-router)#neighbor 34.34.34.3 remote-as 23s
R4(config-router)#net 4.4.4.4 mask 255.255.255.255
verifikasi
R1
R1(config)#do show ip bgp
Network Next Hop Metric LocPrf Weight Path
*> 1.1.1.1/32 0.0.0.0 0 32768 i
* 2.2.2.2/32 13.13.13.3 0 23 i
*> 12.12.12.2 0 0 23 i
* 4.4.4.4/32 13.13.13.3 0 23 4 i
*> 12.12.12.2 0 23 4 i
Kesimpulannya, walaupun sudah menggunakan 2 link, namun tetap saja hanya
1 link yang digunakan. Sekarang kita akan shutdown port int s0/0
sehingga paket tidak lagi melalui R2.
R1
R1(config)#int g1/0
R1(config-if)#sh
R1
R1(config)#do sh ip bgp
Network Next Hop Metric LocPrf Weight Path
*> 1.1.1.1/32 0.0.0.0 0 32768 i
*> 4.4.4.4/32 13.13.13.3 0 23 4 i
R1
R1(config)#do show ip route bgp
4.0.0.0/32 is subnetted, 1 subnets
B 4.4.4.4 [20/0] via 13.13.13.3, 00:03:06
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