User guide

UM-00003
www.netcommwireless.com
NTC-30WV – Outdoor HSPA+ WiFi Router with Voice
41
GRE
When you select GRE, a list of configured GRE VPNs is displayed. Click the “Add” button to configure a GRE VPN connection.
Figure 38 - GRE VPN List
Generic Routing Encapsulation (GRE) is a tunneling protocol developed by Cisco that works in conjunction with PPTP to create a
virtual private network.
Figure 39 - GRE VPN Settings
ITEM
DEFINITION
Enable VPN
Enable or Disable the VPN connection.
Profile Name
A name used to identify the VPN connection.
GRE Server Address
The IP Address on which the GRE VPN server is running.
Local Tunnel IP Address
The Local IP address of the VPN tunnel.
Remote Tunnel IP Address
The Remote IP address of the other end of the VPN tunnel.
Remote Network
Enter the remote network address and subnet mask.
TTL
The Time To Live field, an 8-bit field used to remove an undeliverable data packet from a network to avoid
unnecessary network traffic across the internet. The default value of 255 is the upper limit on the time that an IP
datagram can exist. The value is reduced by at least one for each hop the data packet takes to the next router
on the route to the datagram’s destination. If the TTL field reaches zero before the datagram arrives at its
destination the data packet is discarded and an error message is sent back to the sender.
Verbose Logging
Enable extended logging information for the VPN connection.
Reconnect Delay
The delay before attempting to reconnect to the VPN service.
Reconnect Retries
The number of times to attempt to reconnect to the VPN service.
Table 24 - GRE VPN Settings