BGP Multihoming ISP sama Load Balance
konfigurasi ip address di R1
interface Loopback0
ip address 1.1.1.1 255.255.255.255
!
interface Loopback1
ip address 11.11.11.11 255.255.255.255
!
interface Serial2/0
ip address 12.12.12.1 255.255.255.0
serial restart-delay 0
!
interface Serial2/1
ip address 13.13.13.1 255.255.255.0
serial restart-delay 0
!
Konfigurasi IP Address di R2
interface Loopback0
ip address 2.2.2.2 255.255.255.255
!
interface Loopback1
ip address 22.22.22.22 255.255.255.255
!
interface Ethernet0/0
ip address 23.23.23.2 255.255.255.0
!
interface Serial2/0
ip address 12.12.12.2 255.255.255.0
serial restart-delay 0
!
interface Serial2/1
ip address 24.24.24.2 255.255.255.0
serial restart-delay 0
!
Konfigurasi IP Address di R3
interface Loopback0
ip address 3.3.3.3 255.255.255.255
!
interface Loopback1
ip address 33.33.33.33 255.255.255.255
!
interface Ethernet0/0
ip address 23.23.23.3 255.255.255.0
!
interface Serial2/1
ip address 13.13.13.3 255.255.255.0
serial restart-delay 0
!
interface Serial2/2
ip address 34.34.34.3 255.255.255.0
serial restart-delay 0
!
Konfigurasi IP Address di R4
interface Loopback0
ip address 4.4.4.4 255.255.255.255
!
interface Loopback1
ip address 44.44.44.44 255.255.255.255
!
interface Serial2/1
ip address 24.24.24.4 255.255.255.0
serial restart-delay 0
!
interface Serial2/2
ip address 34.34.34.4 255.255.255.0
serial restart-delay 0
!
Konfigurasi EIGRP dan BGP di R1 serta load balance jalur menuju R2 dan R3
router eigrp 10
network 1.1.1.1 0.0.0.0
network 12.12.12.0 0.0.0.255
network 13.13.13.0 0.0.0.255
!
router bgp 1
bgp log-neighbor-changes
network 11.11.11.11 mask 255.255.255.255
neighbor 12.12.12.2 remote-as 23
neighbor 12.12.12.2 next-hop-self
neighbor 13.13.13.3 remote-as 23
neighbor 13.13.13.3 next-hop-self
maximum-paths 2
!
Konfigurasi EIGRP dan BGP di R2
router eigrp 10
network 2.2.2.2 0.0.0.0
network 12.12.12.0 0.0.0.255
network 23.23.23.0 0.0.0.255
network 24.24.24.0 0.0.0.255
!
router bgp 23
bgp log-neighbor-changes
network 22.22.22.22 mask 255.255.255.255
neighbor 12.12.12.1 remote-as 1
neighbor 12.12.12.1 next-hop-self
neighbor 23.23.23.3 remote-as 23
neighbor 23.23.23.3 next-hop-self
neighbor 24.24.24.4 remote-as 4
neighbor 24.24.24.4 next-hop-self
!
Konfigurasi EIGRP dan BGP di R3
router eigrp 10
network 3.3.3.3 0.0.0.0
network 13.13.13.0 0.0.0.255
network 23.23.23.0 0.0.0.255
network 34.34.34.0 0.0.0.255
!
router bgp 23
bgp log-neighbor-changes
network 33.33.33.33 mask 255.255.255.255
neighbor 13.13.13.1 remote-as 1
neighbor 13.13.13.1 next-hop-self
neighbor 23.23.23.2 remote-as 23
neighbor 23.23.23.2 next-hop-self
neighbor 34.34.34.4 remote-as 4
neighbor 34.34.34.4 next-hop-self
!
Konfigurasi EIGRP dan BGP di R4
router eigrp 10
network 4.4.4.4 0.0.0.0
network 24.24.24.0 0.0.0.255
network 34.34.34.0 0.0.0.255
!
router bgp 4
bgp log-neighbor-changes
network 44.44.44.44 mask 255.255.255.255
neighbor 24.24.24.2 remote-as 23
neighbor 24.24.24.2 next-hop-self
neighbor 34.34.34.3 remote-as 23
neighbor 34.34.34.3 next-hop-self
!
Sebelum di konfigurasi load balance di R1
R1#sh ip bgp
BGP table version is 5, local router ID is 11.11.11.11
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
*> 11.11.11.11/32 0.0.0.0 0 32768 i
* 22.22.22.22/32 13.13.13.3 0 23 i
*> 12.12.12.2 0 0 23 i
* 33.33.33.33/32 12.12.12.2 0 23 i
*> 13.13.13.3 0 0 23 i
* 44.44.44.44/32 13.13.13.3 0 23 4 i
*> 12.12.12.2 0 23 4 i
untuk menuju ip loopback 44.44.44.44 bisa menggunaka 2 jalur, namun jalur yang
digunakan bgp defaultnya hanya satu jalur saja, oleh karena itu pada table
bgp di atas jalur best yang dipilih yaitu jalur 12.12.12.2,
meskpun ada 2 jalur yang aktif tetap hanya satu jalur yang dipilih,
agar lebih paham kita test menggunakan ip route ke 44.44.44.44 dari R1
R1#sh ip route 44.44.44.44
Routing entry for 44.44.44.44/32
Known via "bgp 1", distance 20, metric 0
Tag 23, type external
Last update from 12.12.12.2 00:07:55 ago
Routing Descriptor Blocks:
* 12.12.12.2, from 12.12.12.2, 00:07:55 ago
Route metric is 0, traffic share count is 1
AS Hops 2
Route tag 23
MPLS label: none
Terlihat hasil diatas bahwa untuk menuju 44.44.44.44 menggunakan satu jalur saja
yaitu 12.12.12.2 atau R2
kemudian kita konfigurasi agar jalur 13.13.13.3 dapat digunakan juga,
konfigurasinya di BGP R1, dengan menambahkan maximum path, karena ada 2 jalur
maka maximum-path 2, untuk konfigurasi bisa lihat konfigurasi EIGRP dan BGP
di R1 tepatnya diatas yah, silahkan baca kembali konfigurasi diatas.
berikut hasil R1 ketika sudah di konfigurasi maximum path
R1(config-router)#do sh ip route 44.44.44.44
Routing entry for 44.44.44.44/32
Known via "bgp 1", distance 20, metric 0
Tag 23, type external
Last update from 13.13.13.3 00:00:23 ago
Routing Descriptor Blocks:
13.13.13.3, from 13.13.13.3, 00:00:23 ago
Route metric is 0, traffic share count is 1
AS Hops 2
Route tag 23
MPLS label: none
* 12.12.12.2, from 12.12.12.2, 00:00:23 ago
Route metric is 0, traffic share count is 1
AS Hops 2
Route tag 23
MPLS label: none
R1(config)#do trace 44.44.44.44
Type escape sequence to abort.
Tracing the route to 44.44.44.44
VRF info: (vrf in name/id, vrf out name/id)
1 12.12.12.2 10 msec
13.13.13.3 10 msec
12.12.12.2 10 msec
2 34.34.34.4 19 msec
24.24.24.4 18 msec
34.34.34.4 18 msec
Mantabb mas bro, alhamdulillah hasil test ip route dan trace ke 44.44.44.44
menggunakan 2 jalur serta otomatis load balance, karena pada iSP yang sama
dan AS yang sama pula serta kecepatan Bandwidth yang sama pula.
sampai sini selesei
salam ngoprek