ICR-1601
161
Tunnel
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default
Check the Enable box to enable this PPTP tunnel.
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Click Save button to save the settings.
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Click Undo button to cancel the settings.
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4.1.5
GRE
Generic Routing Encapsulation (GRE) is a tunneling protocol developed by Cisco Systems that
encapsulates a wide variety of network layer protocols inside virtual point-to-point links over an Internet
Protocol internetwork.
Deploy an ICR-1601 router for remote site and establish a virtual private network with control center
by using GRE tunneling. So, all client hosts behind ICR-1601 router can make data communication with
server hosts behind control center router.
GRE Tunneling is similar to IPSec Tunneling, client requesting the tunnel establishment with the server.
Both the client and the server must have a Static IP or a FQDN. Any peer router can be worked as either
a client or a server, even using the same set of configuration rule.