IP SLA Tracking - WAN Redudancy

Salah satu cara paling sederhana membuat redudancy WAN di Cisco device adalah dengan menggunakan Static Routing Back Route dengan IP SLA Tracking. Dengan menggunakan fitur ini IP SLA mampu mengidentifikasi kondisi jalur WAN menggunakan PING apakah link down atau tidak?.

Tujuan LAB ini si komputer/pc dapat akses ke internet (ip 8.8.8.8) dengan link utama adalah ISP-1, namun apabila link ISP-1 down, maka link ISP-2 akan aktif secara otomatis dan siap untuk digunakan PC sebagai linkk menuju internet. Berikut Topoliginya;

Configurasi Router INTERNET

 hostname INTERNET

interface Loopback1

 ip address 8.8.8.8 255.255.255.255

!

interface FastEthernet0/0

 ip address 10.10.10.1 255.255.255.0

interface FastEthernet0/1

 ip address 20.20.20.1 255.255.255.0

router ospf 1

 network 0.0.0.0 255.255.255.255 area 0

Configurasi Router ISP-1

hostname ISP-1

interface FastEthernet0/0

 ip address 10.10.10.2 255.255.255.0

 ip ospf 1 area 0

interface FastEthernet0/1

 ip address 1.1.1.1 255.255.255.0

 ip ospf 1 area 0

router ospf 1

 network 1.1.1.0 0.0.0.3 area 0

 network 10.10.10.0 0.0.0.3 area 0

Configurasi Router ISP-2

hostname ISP-2

interface FastEthernet0/0

 ip address 20.20.20.2 255.255.255.0

 ip ospf 1 area 0

interface FastEthernet0/1

 ip address 2.2.2.2 255.255.255.0

 ip ospf 1 area 0

router ospf 1

 network 2.2.2.2.0 0.0.0.3 area 0

 network 20.20.20.0 0.0.0.3 area 0

Configurasi Router R4

R4(config)#INterface FA0/0

R4(config-if)#IP ADDress 1.1.1.2 255.255.255.252

R4(config-if)#NO SHutdown

R4(config)#INterface FA0/1

R4(config-if)#IP ADDress 2.2.2.2 255.255.255.252

R4(config-if)#NO SHutdown

R4(config-if)#EX

R4(config)#INterface FAstEthernet 1/0

R4(config-if)#IP ADDress 192.168.10.1 255.255.255.0

R4(config-if)#NO SHu

R4(config)#ip route 0.0.0.0 0.0.0.0 1.1.1.1 track 1

R4(config)#ip route 0.0.0.0 0.0.0.0 2.2.2.1 10

R4(config)#ip sla 1

R4(config-ip-sla)#icmp-echo 1.1.1.1 source-interface fastEthernet 0/1

R4(config-ip-sla-echo)#timeout 1000

R4(config-ip-sla-echo)#threshold 2

R4(config-ip-sla-echo)#frequency 3

R4(config)#ip sla schedule 1 life forever start-time now

R4(config)#track 1 rtr 1 reachability

R4(config-track)#exi

R4(config)#

-----------------------------------------------------------------

#TAMBHAKN SCRIPT INI AGAR DARI PC1 SATU BISA PING KE INTERNET ( 8.8.8.8)

-------------------------------------------------------------------

R4(config)#ip access-list extended 101

R4(config-ext-nacl)#permit ip 192.168.10.0 0.0.0.255 any

R4(config)#route-map NAT_ISP-1 permit 10

R4(config-route-map)#match ip address 101

R4(config-route-map)#match interface fa0/0 #description interface R4 menju ISP-1

R4(config-route-map)#exi

R4(config)#route-map NAT_ISP-2 permit 10

R4(config-route-map)#match ip address 101

R4(config-route-map)#match interface fa0/1 #description interface R4 menju ISP-2

R4(config-route-map)#exi

R4(config)#ip nat inside source route-map NAT_ISP-1 interface fa0/0 overload

R4(config)#ip nat inside source route-map NAT_ISP-2 interface fa0/1 overload

R4(config)#in

R4(config)#interface fa0/0

R4(config-if)#ip nat outside

R4(config-if)#ex

R4(config)#interface fa0/1

R4(config-if)#ip nat outside

R4(config-if)#ex

R4(config)#interface fa1/0

R4(config-if)#ip nat inside

R4(config-if)#exi

R4(config)#

Berbagi :