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CLI-based Configuration Guide - VPN

AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R010

This document describes VPN features on the device and provides configuration procedures and configuration examples.
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Enlarging the Operation Scope of a Network with a Hop Limit

Enlarging the Operation Scope of a Network with a Hop Limit

As shown in Figure 3-6, the network runs the IP protocol. Assume that the IP protocol limits the hop count to 255. If the hop count between two PCs is more than 255, they cannot communicate with each other. You can set up a GRE tunnel between two devices on the network to hide the hops between them. This enlarges the network operation scope.

For example, the Routing Information Protocol (RIP) protocol defines that a route is unreachable when the hop count reaches 16. You can configure a GRE tunnel between two devices to reduce the hop count of the RIP route passing through the GRE tunnel to less than 16. Then the route is reachable.

Figure 3-6  Enlarging the network operation scope

Updated: 2019-08-07

Document ID: EDOC1100033725

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