VEGA LUCOM EDGE router ER75i v2 SL USER’S GUIDE - Manual (Page 59)

CONFIGURATION
59
The tunnels are active after selecting Create x GRE tunnel. In the singles window it
is possible to define the IP address of the remote side of the tunnel (Remote External IP
Address), internal IP address of the local side of the tunnel (Local Internal IP Address),
internal IP address of the remote side of the tunnel (Remote Internal IP Address), address
of the network behind the remote side of the tunnel (Remote Subnet) and the mask
of the network behind the remote side of the tunnel (Remote Subnet Mask). The GRE tunnel
is used for connection of two networks to one that appears as one homogenous. Last item
(“Pre-shared Key”) defines 32b number that
identifies shared key of tunnel. This code must
be on both sides of same, differently router drops packets.
Attention, GRE tunnel doesn’t connect itself via NAT.
The changes in settings will apply after pressing the Apply button.
Example of the GRE Tunnel configuration:
GRE tunnel Configuration:
A B
Remote External IP Address: 10.0.0.2 10.0.0.1
Remote Subnet: 192.168.2.0 192.168.1.0
Remote Subnet Mask: 255.255.255.0 255.255.255.0
192.168.1.4
192.168.1.3
192.168.1.2
192.168.2.2
192.168.2.3
192.168.2.4
ppp0 10.0.0.1
ppp0 10.0.0.2
GRE tunel
Default Gateway 192.168.1.1
Default Gateway 192.168.2.1
A
B
192.168.1.1
192.168.2.1
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