Lab 5 - BGP Route Reflector

Route Reflector

gambar topology 1.1

pada kesempatan kali ini saya akan share tentang lab route reflector....yaitu Konsepnya ialah  Pada iBGP, kali ini keseluruhan peersnya harus mesh,artinya 

• R1 peers ke R2,R3,R4
• R2 peers ke R1,R3,R4
• R3 peers ke R1,R2,R4
• R4 peers ke R1,R2,R3

problem disini jika kita ingin menambahkan router baru maka selain router tersebut peersnya ke R1,R2,R3,dan R4 juga router lain sehingga harus peers satu persatu ke router tersbeut..sehingga pekerjaan admin lebih banyak dan merepotkan ...

solusi disini kita hanya menjadikan salah satu router menjadi reflector.dan pada lab kali ini kita akan ngonfig sebagai route reflector server.sehingga router reflectpr tersebut melakukan peers ke semua router dan peersnya cukup ke router reflector saja .

R1(config)#int f3/0

R1(config-if)#ip add 12.12.12.1 255.255.255.0

R1(config-if)#no shut

R1(config-if)#int lo0

R1(config-if)#ip add 1.1.1.1 255.255.255.255

R1(config-if)#

R1(config-if)#router rip

R1(config-router)#net 1.0.0.0

R1(config-router)#net 12.0.0.0

R1(config-router)#router bgp 1234

R1(config-router)#neigh 2.2.2.2 remote 1234

R1(config-router)#neigh 2.2.2.2 up lo0

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

R1(config-router)#neigh 3.3.3.3 remote 1234

R1(config-router)#neigh 3.3.3.3 up lo0

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

R1(config-router)#neigh 4.4.4.4 remote 1234

R1(config-router)#neigh 4.4.4.4 ip lo0

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

R1(config-router)#

R2(config)#int f3/0

R2(config-if)#ip add 12.12.12.2 255.255.255.0

R2(config-if)#no shut

R2(config-if)#int lo0

R2(config-if)#ip add 2.2.2.2 255.255.255.255

R2(config-if)#int f4/0

R2(config-if)#ip add 23.23.23.2 255.255.255.0

R2(config-if)#no shut

R2(config-if)#router rip

R2(config-router)#network 12.0.0.0

R2(config-router)#net 2.0.0.0

R2(config-router)#net 23.0.0.0

R2(config-router)#router bgp 1234

R2(config-router)#neigh 1.1.1.1 remote 1234

R2(config-router)#neigh 1.1.1.1 up lo0

R2(config-router)#

R3(config)#int f4/0

R3(config-if)#ip add 23.23.23.3 255.255.255.0

R3(config-if)#no shut

R3(config-if)#int f4/1

R3(config-if)#ip add 34.34.34.3 255.255.255.0

R3(config-if)#no shut

R3(config-if)#int lo0

R3(config-if)#ip add 3.3.3.3 255.255.255.255

R3(config-if)#router rip

R3(config-router)#net 34.0.0.0

R3(config-router)#net 23.0.0.0

R3(config-router)#net 3.0.0.0

R3(config-router)#router bgp 1234

R3(config-router)#neigh neigh 1.1.1.1 remote 1234

R3(config-router)#neigh 1.1.1.1 remote 1234

R3(config-router)#neigh 1.1.1.1 up lo0

R3(config-router)#

R4(config)#int f4/1

R4(config-if)#ip add 34.34.34.4 255.255.255.0

R4(config-if)#no shut

R4(config-if)#int lo0

R4(config-if)#ip add 4.4.4.4 255.255.255.255

R4(config-if)#router rip

R4(config-router)#net 34.0.0.0

R4(config-router)#net 4.0.0.0

R4(config-router)#router bgp 1234

R4(config-router)#neigh 1.1.1.1 remote 1234

R4(config-router)#neigh 1.1.1.1 up lo0

R4(config-router)#

Lakukan pengecekan

R1(config-router)#do sh ip bgp sum

BGP router identifier 1.1.1.1, 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      14      14        1    0    0 00:09:44        0

3.3.3.3         4         1234       6       4        1    0    0 00:02:01        0

4.4.4.4         4         1234       4       2        1    0    0 00:00:18        0

R2#sh bgp sum

BGP router identifier 2.2.2.2, 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      80      80        1    0    0 01:09:31        0

Untuk pengetesan advertise suatu route  di salah satu router  ,dan pastikan bisa diping dari semua router

R4(config)#int lo1

R4(config-if)#ip add 44.44.44.44 255.255.255.255

R4(config-if)#router bgp 1234

R4(config-router)#net 44.44.44.44 mask 255.255.255.255

R4(config-router)#

Setelah itu verifikasi pada setiap route yang di advertise ole R4 ke bgp tersebut

R2#sh ip bgp

BGP table version is 2, local router ID is 2.2.2.2

Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,

              r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,

              x best-external, a additional-path, c RIB-compressed,

Origin codes: i - IGP, e - EGP, ? - incomplete

RPKI validation codes: V valid, I invalid, N Not found

     Network          Next Hop            Metric LocPrf Weight Path

 *>i 44.44.44.44/32   4.4.4.4                  0    100      0 i 

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 = 20/68/104 ms

R1#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 = 72/98/152 ms

R1#