Konfigurasi Encapsulation

GRE (Generic Routing Encapsulation) atau IP tunneling (IP encapsulation) adalah teknik enkapsulasi packet IP di dalam packet IP. Lebih mudahnya, dengan GRE kita bisa menciptakan "terowongan" sebagai jalur data khusus untuk meneruskan sebuah packet melalui jaringan komputer, baik itu jaringan komputer pribadi ataupun publik. Jadi, walaupun "terowongan" tadi melewati banyak hop, namun oleh packet ybs dianggap sebagai 1 hop saja, yaitu pintu masuk tunnel dan pintu keluar tunnel.

* Konfigurasinya :

Router>en

Router>enable 

Router#conf

Router#configure ter

Router#configure terminal 

Enter configuration commands, one per line.  End with CNTL/Z.

Router(config)#interface fa7/0

Router(config-if)#no sh

Router(config-if)#no shutdown 

Router(config-if)#

%LINK-5-CHANGED: Interface FastEthernet7/0, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet7/0, changed state to up

Router(config-if)#interface fa7/0.10

%LINK-5-CHANGED: Interface FastEthernet7/0.10, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet7/0.10, changed state to up

Router(config-subif)#enc

Router(config-subif)#encapsulation dt

Router(config-subif)#encapsulation d

Router(config-subif)#encapsulation dot1Q ?

  <1-1005>  IEEE 802.1Q VLAN ID

Router(config-subif)#encapsulation dot1Q 10

Router(config-subif)#ip ad

Router(config-subif)#ip address 70.70.70.1 255.255.255.0

Router(config-subif)#interface fa7/0.20

Router(config-subif)#

%LINK-5-CHANGED: Interface FastEthernet7/0.20, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet7/0.20, changed state to up

Router(config-subif)#en

Router(config-subif)#encapsulation d

Router(config-subif)#encapsulation dot1Q 20

Router(config-subif)#ip ad

Router(config-subif)#ip address 80.80.80.1 255.255.255.0

Router(config-subif)#

Router(config-subif)#interface fa7/0.30

Router(config-subif)#

%LINK-5-CHANGED: Interface FastEthernet7/0.30, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet7/0.30, changed state to up

Router(config-subif)#en

Router(config-subif)#encapsulation dot

Router(config-subif)#encapsulation dot1Q 30

Router(config-subif)#ip ad

Router(config-subif)#ip address 90.90.90.1 255.255.255.0