Netopia 3300-ENT manual About GRE Tunnels, Configuration Add Connection Profile

Virtual Private Networks (VPNs) 4-11

About GRE Tunnels

Generic Routing Encapsulation (GRE) protocol is another form of tunneling that Netopia routers support. A GRE tunnel is brought up when a valid GRE profile is installed, and brought down when the profile is disabled, or deleted.

GRE tunnels are not connection-based, but rather are installed and simply wait for GRE packets. There is no special startup initiation as with PPPoE or PPTP. GRE is best adapted to simple routing and/or tunneling, and is not for use with any sensitive data. GRE offers no encryption; and authentication of data integrity is limited to checksum verification, if enabled.

To set up a GRE tunnel, you create a Connection Profile including the IP address and other relevant information for the remote partner.

Main

Menu

WAN

Configuration

Add Connection

Profile

Add Connection		Profile
Profile Name:		Profile 2
Profile Enabled:	+-------------		+
	+-------------		+
Encapsulation Type...		PPP
Underlying Encapsulation...		ATMP
		PPTP
Encapsulation Options...		IPsec
		L2TP
	GRE
IP Profile Parameters...	+-------------+
Interface Group...		Primary
COMMIT		CANCEL

When you define a Connection Profile as using GRE by selecting GRE as the Encapsulation Type, and then select Encapsulation Options, the GRE Tunnel Options screen appears.