LAB 6. BGP Route Reflector

Pada i-BGP peernya harus full mesh ,maksudnya yaitu 

• R1 peers ke R2, R3, R4 

• R2 peers ke R1, R3, R4 

• R3 peers ke R1, R2, R4 

• R4 peers ke R1, R2, R3

Hapus konfigurasi BGP pada lab sebelumnya dan tambahkan 1 router baru.

R1 dan R2 

R1(config)#no router bgp 12 

R2(config)#no router bgp 12 

R3 

R3(config)#no router bgp 3 

Sekarang kita akan mengkonfigurasi IP pada R3 dan R4 

R3 

R3(config)#int f1/0 

R3(config-if)#ip add 34.34.34.3 255.255.255.0 

R3(config-if)#no shutdown 

R4 

R4(config)#int f0/0 

R4(config-if)#ip address 34.34.34.4 255.255.255.0 

R4(config-if)#no shutdown 

R4(config-if)#exit 

R4(config)#int lo0 

R4(config-if)#ip add 4.4.4.4 255.255.255.255 

R4(config-if)#exit 

Kita konfigurasi BGP dan EIGRP pada masing-masing router 

R1 

R1(config)#router eigrp 10 

R1(config-router)#network 1.1.1.1 0.0.0.0 

R1(config-router)#network 12.12.12.1 0.0.0.0 

R1(config-router)#no auto-summary 

R1(config-router)#exit 

R1(config)#router bgp 1234 

R1(config-router)#neighbor 2.2.2.2 remote-as 1234 

R1(config-router)#neighbor 2.2.2.2 update lo0 

R1(config-router)#neighbor 2.2.2.2 route-reflector-client 

R1(config-router)#neighbor 3.3.3.3 remote-as 1234 

R1(config-router)#neighbor 3.3.3.3 update lo0 

R1(config-router)#neighbor 3.3.3.3 route-reflector-client 

R1(config-router)#neighbor 4.4.4.4 remote-as 1234 

R1(config-router)#neighbor 4.4.4.4 update lo0 

R1(config-router)#neighbor 4.4.4.4 route-reflector-client 

R1(config-router)#exit 

R2 

R2(config)#router eigrp 10 

R2(config-router)#network 2.2.2.2 0.0.0.0 

R2(config-router)#network 12.12.12.2 0.0.0.0 

R2(config-router)#network 23.23.23.2 0.0.0.0 

R2(config-router)#no auto-summary 

R2(config)#router bgp 1234 

R2(config-router)#neighbor 1.1.1.1 remote-as 1234 

R2(config-router)#neighbor 1.1.1.1 update-source lo0 

R2(config-router)#exit 

R3 

R3(config)#router eigrp 10 

R3(config-router)#network 23.23.23.3 0.0.0.0 

R3(config-router)#network 34.34.34.3 0.0.0.0 

R3(config-router)#network 3.3.3.3 0.0.0.0 

R3(config-router)#no auto-summary 

R3(config-router)#exit 

R3(config)#router bgp 1234 

R3(config-router)#neighbor 1.1.1.1 remote-as 1234 

R3(config-router)#neighbor 1.1.1.1 update-source lo0 

R4 

R4(config)#router eigrp 10 

R4(config-router)#network 4.4.4.4 0.0.0.0 

R4(config-router)#network 34.34.34.4 0.0.0.0 

R4(config-router)#no auto-summary 

R4(config-router)#exit 

R4(config)#router bgp 1234 

R4(config-router)#neighbor 1.1.1.1 remote-as 1234 

R4(config-router)#neighbor 1.1.1.1 update-source lo0 

R4(config-router)#exit 

Kita cek 

R1 

R1#sh ip bgp summary 

BGP router identifier 11.11.11.11, local AS number 1234 

BGP table version is 1, main routing table version 1

Neighbor      V           AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down 

State/PfxRcd 

2.2.2.2        4      1234         4       4      1     0  0 00:02:33      0 

3.3.3.3        4      1234         4       4      1     0 0 00:02:31       0 

 4.4.4.4       4      1234         4       4      1     0 0 00:02:34       0 

R2 

R2#sh ip bgp summary 

BGP router identifier 22.22.22.22, local AS number 1234 

BGP table version is 1, main routing table version 1 

 Neighbor        V        AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down 

State/PfxRcd 

1.1.1.1        4      1234       10     10         1   0   0 00:08:58    0  

Pengetesan, kita harus advertise suatu route di salah satu router dan kita pastikan bisa ping dari semua router. 

R4 

R4(config)#interface Loopback44 

R4(config-if)#ip address 44.44.44.44 255.255.255.255 

R4(config)#router bgp 1234 

R4(config-router)#network 44.44.44.44 mask 255.255.255.255 

Kita cek lagi pada setiap router mengenai route yang diadvertise oleh R4 

R1 

R1#sh ip bgp 44.44.44.44 

BGP routing table entry for 44.44.44.44/32, version 3 

Paths: (1 available, best #1, table Default-IP-Routing-Table, RIB-failure(17)) 

Flag: 0x820 

  Advertised to update-groups: 

       1 

  Local, (Received from a RR-client)  

  4.4.4.4 (metric 161280) from 4.4.4.4 (44.44.44.44) 

    Origin IGP, metric 0, localpref 100, valid, internal, best 

R3 

R3#sh ip bgp 44.44.44.44 

BGP routing table entry for 44.44.44.44/32, version 3 

Paths: (1 available, best #1, table Default-IP-Routing-Table, RIB-failure(17)) 

Flag: 0x820 

 Not advertised to any peer 

 Local 

    4.4.4.4 (metric 156160) from 1.1.1.1 (11.11.11.11) 

      Origin IGP, metric 0, localpref 100, valid, internal, best 

      Originator: 44.44.44.44, Cluster list: 11.11.11.11 

Kita cek ping 

R2 

R2#ping 44.44.44.44 

Type escape sequence to abort. 

Sending 5, 100-byte ICMP Echos to 44.44.44.44, timeout is 2 seconds: 

!!!!! 

Success rate is 100 percent (5/5), round-trip min/avg/max = 28/32/36 ms