IP tunnel architecture
The IP tunnel architecture in the figure is used in this example.
Tunnel configuration
A tunnel can be seen as a set of two static routing entries in nodes on the edge of the
OSI network and the corresponding static entries in the routing table. The term tunnel
may be misleading because it is often associated with connections which must be set
up in advance. In this case, only some routing and mapping information needs to be
provisioned and no communication between two systems is needed to set up the
“tunnel” between them. To avoid confusion, it is better to speak of encapsulation and
to think of the OSI network as a non broadcast multiple access (NBMA) subnetwork
within the IP network.
The NEs need to be configured with one IP address on the LAN side, connected to the
IP subnet with the IP NEs. The LAN can be used for both OSI and IP traffic. The
same Ethernet address will be used for both protocols.
DS NE
DS NE
NE
NE
DCN
LAN
IP Host
LAN (IP & OSI)
IP
Router
LAN (IP & OSI)
Management
System
IP-based
Management
System
other IP-managed
Equipment
IP Host
Chia sẻ với bạn bè của bạn: 
