User manual

Chapter 4 - Layer 3 Command Set - IP Networking Tun Command (Tunnels Building)
Alvarion BreezeNET B130/B300 GigE 107 Operational User Manual
4.2 Tun Command (Tunnels Building)
The command specifies the parameters of a software tunnel.
General Description:
Tunnels are used to merge two remote and physically not connected networks into
one logical structure. Tunnels are widely used to create corporate networks or the
so-called virtual private networks (VPN): several remote offices, connected to the
network through the same or different providers, are connected to the company
headquarters or to each other by tunnels, thus forming one corporate structure.
Common IP address space and registration/accounting policy can be used
throughout the whole VPN-based corporate network, independently of network
provider(s) used.
Tunnels also solve the problem of using common transport media in a public
network so that different clients could be provided with services by several
providers. It means that a client can be connected by a tunnel to a specific
provider, to be serviced by that provider, irrespective of the client's connection
point to a common transport network.
Figure 4-1: Tunnels Between Physically Separated Networks