cisco_aria
Learn Cisco Packet Tracer
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Konfigurasi GRE Tunnel dengan OSPF
Gambar Topologi
1
2
syarat
modul yang didukung
- router model 2811, 2911, atau 1941
- HWIC-2T
- Serial WAN Interface Card
konfigurasi
- router yang ingin di tunnel harus punya ip public agar bisa di buat tunnel
Contoh Konfigurasi Tunnel
int tunnel <id>
tunnel source <interface_to_service_provider>
tunnel destination <ip_destination_tunnel>
ip address 192.168.1.1 255.255.255.252
R1
interface Tunnel0
ip address 192.168.1.1 255.255.255.252
tunnel source GigabitEthernet0/0/0
tunnel destination 200.0.0.2
R2
interface Tunnel0
ip address 192.168.1.2 255.255.255.252
tunnel source GigabitEthernet0/0/0
tunnel destination 100.0.0.2
Status Interface R1
R1# show ip interface brief
Interface IP-Address OK? Method Status Protocol
GigabitEthernet0/0 10.0.1.1 YES NVRAM up up
GigabitEthernet0/1 unassigned YES NVRAM administratively down down
GigabitEthernet0/2 unassigned YES NVRAM administratively down down
GigabitEthernet0/0/0 100.0.0.2 YES manual up up
Tunnel0 192.168.1.1 YES manual up down
Vlan1 unassigned YES unset administratively down down
Masalah: Tunnel0 pada R1 berstatus down karena tunnel destination mengarah ke alamat IP yang tidak bisa dijangkau. Pastikan IP 200.0.0.2 bisa di-ping dari R1.
Routing Default di R2
ip route 0.0.0.0 0.0.0.0 200.0.0.1
R2# show ip interface brief | include Tunnel
Tunnel0 192.168.1.2 YES manual up up
jangan lupa tambahakn di router 1 juga ip route 0.0.0.0 0.0.0.0 100.0.0.1
Menambahkan OSPF Jika Tunnel Sudah Aktif
Jika router CE sudah bisa saling ping melalui tunnel, kita bisa mengaktifkan OSPF.
R1
router ospf 1
passive-interface GigabitEthernet0/0
network 192.168.1.1 0.0.0.0 area 0
network 10.0.1.1 0.0.0.0 area 0
R2 (disesuaikan)
router ospf 1
passive-interface GigabitEthernet0/0
network 192.168.1.2 0.0.0.0 area 0
network <ip_client> <wildcard> area 0
Dengan OSPF, router client bisa saling terhubung tanpa perlu static route ke provider.