Lab 80 - BGP Route Reflector Cisco

Pada lab sebelumnya kita sudah belajar tentang Masalah Full Mesh IBGP. Selanjutnya pada lab ini kita akan belajar cara mengatasi masalah tersebut, yaitu menggunakan route reflector. Berikut topologi yang akan kita gunakan pada lab ini

Gambar 1 Topologi jaringan IBGP

Topologi ini merupakan topologi yang kita gunakan pada lab sebelumnya. Biar gak pusing kita hapus aja dulu deh konfig an BGP nya

R1(config)#no router bgp 123

R2(config)#no router bgp 123

R3(config)#no router bgp 123

Oke sekarang kita konfig IBGP, tapi sekarang kita gk bakal pake full mesh, karena kita bakal pake route reflector.

Aturannya pake route reflector adalah salah satu router akan dijadikan route reflector server. Dimana nantinya route reflector harus peering dengan router lain, namun router lain (route reflector client) hanya perlu peering dengan route reflector server. Kali ini kita akan konfig R2 sebaga route reflector server

R1(config)#router bgp 123
R1(config-router)#neighbor 12.12.12.2 remote-as 123
R1(config-router)#net 1.1.1.1 mask 255.255.255.255

R2(config)#router bgp 123
R2(config-router)#neighbor 12.12.12.1 remote-as 123
R2(config-router)#neighbor 12.12.12.1 route-reflector-client 
R2(config-router)#neighbor 23.23.23.3 route-reflector-client
R2(config-router)#net 2.2.2.2 mask 255.255.255.255

R3(config)#router bgp 123
R3(config-router)#neighbor 23.23.23.2 remote-as 123
R3(config-router)#net 3.3.3.3 mask 255.255.255.255

Langsung aja deh kita cek tabel routing di semua router

R1(config-router)#do sh ip ro

      1.0.0.0/32 is subnetted, 1 subnets
C        1.1.1.1 is directly connected, Loopback0
      2.0.0.0/32 is subnetted, 1 subnets
B        2.2.2.2 [200/0] via 12.12.12.2, 00:01:22
      3.0.0.0/32 is subnetted, 1 subnets
B        3.3.3.3 [200/0] via 23.23.23.3, 00:00:14
      12.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C        12.12.12.0/24 is directly connected, Ethernet0/0
      23.0.0.0/24 is subnetted, 1 subnets
S        23.23.23.0 [1/0] via 12.12.12.2

R2(config-router)#do sh ip ro

      1.0.0.0/32 is subnetted, 1 subnets
B        1.1.1.1 [200/0] via 12.12.12.1, 00:02:14
      2.0.0.0/32 is subnetted, 1 subnets
C        2.2.2.2 is directly connected, Loopback0
      3.0.0.0/32 is subnetted, 1 subnets
B        3.3.3.3 [200/0] via 23.23.23.3, 00:00:11
      12.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C        12.12.12.0/24 is directly connected, Ethernet0/0
      23.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C        23.23.23.0/24 is directly connected, Ethernet0/1

R3(config-router)#do sh ip ro

      1.0.0.0/32 is subnetted, 1 subnets
B        1.1.1.1 [200/0] via 12.12.12.1, 00:00:08
      2.0.0.0/32 is subnetted, 1 subnets
B        2.2.2.2 [200/0] via 23.23.23.2, 00:00:08
      3.0.0.0/32 is subnetted, 1 subnets
C        3.3.3.3 is directly connected, Loopback0
      12.0.0.0/24 is subnetted, 1 subnets
S        12.12.12.0 [1/0] via 23.23.23.2
      23.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C        23.23.23.0/24 is directly connected, Ethernet0/0

Juozzz tabel routing disemua router udah lengkap.. untuk lebih memastikan kita coba ping deh

R1(config-router)#do ping 2.2.2.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2.2.2.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
R1(config-router)#do ping 3.3.3.3

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms