User's Manual

Configuring GRE Tunnels
308625-14.00 Rev 00
1-5
Figure 1-2. GRE Tunnel Encapsulating the IP Protocol
Router 2
Router 1
Router
interface
Router
interface
Tunnel
interface
Tunnel
interface
Key
IP0064A
Internet/Intranet
10.0.0.1
8.0.0.2
data
data
MAC header
Source IP address
Destination IP address
11.0.0.10
11.0.0.20
10.0.0.1
8.0.0.2
MAC header
Source IP address
Destination IP address
GRE header
Source IP address
Destination address
10.0.0.1
8.0.0.2
data
MAC header
Source IP address
Destination IP address
Transport protocol
Passenger protocol
Host
2
Host
1