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H8922 3G/4G Router User Manual
Figure 5-55
L2TP tunnel status
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5.6.2
Tunnel configuration
Tunnel technology transfers data between the networks through the Internet infrastructure. In the whole pro-
cess of transmission, when the encapsulated data package delivered on a public Internet, the logic path which
the packet passes through is called tunnel. GRE and IPIP Tunnel configuration supports two modes.
GRE (Generic Routing Encapsulation, Generic Routing protocol encapsulation) specifies how to use a network
protocol to another network protocol encapsulation method. The main purpose of the GRE protocol, there are
two: internal protocol encapsulation and private address encapsulation.
IPIP tunnel is a simple agreement between two routers for IP packet encapsulation, IPIP tunnel interface will be
like a physical interface in the interface list, many routers including Cisco, basically support the agreement. This
agreement enables multiple network distribution possible.
Step 1
Log in to the H8922 4G Router configuration page.
For details on how to log in to the device, see 5.2.1 “Logging In to the WEB Configuration
page”.
Step 2
Click “VPN > Tunnel” to open the configuration page of “Tunnel” .
Step 3
Click Add to add a new tunnel rule. See below:
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