CCNP - Tunneling GRE

 

Lab 13 GRE Tunnel

GRE (Generic Routing Encapsulation) adalah sebuah tunnelling protocol yang sebenarnya dikembangkan oleh Cisco System. Dengan menggunakan protokol ini kita dapat melakukan enkapsulasi berbagai protokol yang dibuat untuk kebutuhan link virtual point-to point.

R1(config)#int f0/0
R1(config-if)#ip add 12.12.12.1 255.255.255.0
R1(config-if)#no sh
R1(config-if)#ex
R1(config)#int f0/1
R1(config-if)#ip add 13.13.13.1 255.255.255.0
R1(config-if)#no sh
R1(config-if)#ex
R1(config)#int lo0
R1(config-if)#ip add 8.8.8.8 255.255.255.255
R1(config-if)

R2(config)#int f0/0
R2(config-if)#ip add 12.12.12.2 255.255.255.0
R2(config-if)#no sh
R2(config-if)#ex
R2(config)#int lo0
R2(config-if)#ip add 2.2.2.2 255.255.255.255
R2(config-if)#ex

R3(config)#int f0/0
R3(config-if)#ip add 13.13.13.3 255.255.255.0
R3(config-if)#no sh
R3(config-if)#ex
R3(config)#int lo0
R3(config-if)#ip add 3.3.3.3 255.255.255.255
R3(config-if)#ex

Pasang default route

R2(config)#ip route 0.0.0.0 0.0.0.0 12.12.12.1
R3(config)#ip route 0.0.0.0 0.0.0.0 13.13.13.1

Cek ping 

 R2(config)#do ping 8.8.8.8 Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 15/18/54 ms 

kita bikin interface tunnel 

R2(config)#int tunnel23
R2(config-if)#tunnel source f0/0
R2(config-if)#tunnel destination 13.13.13.3
R2(config-if)#ip add 172.16.10.1 255.255.255.252
R2(config-if)#ex

R2(config)#int tunnel23
R R2(config-if)#tunnel source f0/0
R2(config-if)#tunnel destination 12.12.12.2
R2(config-if)#ip add 172.16.10.2 255.255.255.252
R2(config-if)#ex

Cek ping 

R2(config)#do ping 172.16.10.2
Sending 5, 100-byte ICMP Echos to 172.16.10.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 29/45/59 ms

tunnel sudah up

R2(config)#router eigrp 23
R2(config-router)#net172.16.10.1 0.0.0.0
R2(config-router)#net 2.2.2.2 0.0.0.0
R2(config-router)#no auto-summary
R2(config-router)#ex 

R3(config)#router eigrp 23
R3(config-router)#net 3.3.3.3 0.0.0.0
R3(config-router)#net 172.16.10.2 0.0.0.0
R3(config-router)#no auto-summary

Kita cek sekarang

R2(config)#do show ip route eigrp
3.0.0.0/32 is subnetted, 1 subnets
D…………3.3.3.3 [90/27008000] via 172.16.10.2, 00:00:32, Tunnel23

Cek ping  dan traceroute

R2(config)#do ping 3.3.3.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 3.3.3.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 08/19/26 ms

R2#traceroute 3.3.3.3 source 2.2.2.2
Type escape sequence to abort. Tracing the route to 3.3.3.3
1 172.16.10.2 52 msec 20 msec 36 msec

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