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Ursalink UR51 Industrial Cellular Router User Guide

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<strong>UR51</strong> <strong>User</strong> <strong>Guide</strong><br />

GRE<br />

Item<br />

Enable<br />

Remote IP Address<br />

Local IP Address<br />

Local Virtual IP Address<br />

Netmask<br />

Peer Virtual IP Address<br />

Global Traffic<br />

Forwarding<br />

Remote Subnet<br />

Remote Netmask<br />

Description<br />

Check to enable GRE function.<br />

Enter the real remote IP address of GRE tunnel.<br />

Set the local IP address.<br />

Set the local tunnel IP address of GRE tunnel.<br />

Set the local netmask.<br />

Enter remote tunnel IP address of GRE tunnel.<br />

All the data traffic will be sent out via GRE tunnel when this<br />

function is enabled.<br />

Enter the remote subnet IP address of GRE tunnel.<br />

Enter the remote netmask of GRE tunnel.<br />

MTU Enter the maximum transmission unit. Range: 64-1500.<br />

Key<br />

Enable NAT<br />

Set GRE tunnel key.<br />

Enable NAT traversal function.<br />

Table 4-2-8-4 GRE Parameters<br />

4.2.8.4 L2TP<br />

Layer Two Tunneling Protocol (L2TP) is an extension of the Point-to-Point Tunneling Protocol<br />

(PPTP) used by an Internet service provider (ISP) to enable the operation of a virtual private<br />

network (VPN) over the Internet.<br />

Figure 4-2-8-5<br />

60

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