N2N - Caimore CM520-8AF/W User Manual

tunnel state, router will send LCP packet to server in every tunnel check interval. When
the number of tunnel-checking failures over the value of "Tunnel Check Times", router
will initiate to terminate the connection and send a request to rebuild the tunnel.
 Other Parameters: It's used in a situation where a special parameter is required to
negotiate when establishing a tunnel. In general, this parameter can be left in blank,
unless server is requiring a special negotiation parameter.
Format -- "novj;novjcomp", between each parameter should be separated by ";".

4.3.4 N2N

N2N is a two-tier VPN, it allows users to develop typical features of P2P application at
Network-layer, but not Application-layer. That means users can get the same visibility as the
local IP (for example, two PC in a N2N-network can ping each other successfully), and also
can visit each other by the IP address of N2N virtual network without caring about the
physical network address that PC currently belongs to. We can say that OpenVPN
implements the SSL by moving it from Application-layer to Network-layer, while N2N
implementing P2P by moving it from Application-layer to Network-layer.
 Interface: Device name.
 Local IP: Local tunnel IP address.
 Subnet: Edge node interface subnet mask.
 Group: Group name of the connection.
 Password: Group password of the connection.
 Server IP: IP address of server.
 Port: Port of server side.
 MAC: MAC address of interface.
 MTU: Maximum transmission unit.
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