TMS zl Management and Configuration Guide ST.1.1.100226

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Virtual Private Networks
Configure a GRE Tunnel
10. For Destination IP Address, type an accessible IP address on the remote
tunnel gateway (indicated by 3 in the figure and different from the address
configured on the subnet reserved for the tunnel).
11. To enable the keepalive feature for the GRE tunnel, select Enable Keepal-
ive.
a. For Period, type the interval, in seconds, between sending keepalives.
This interval can be a short as 1 second or as long as 3600 seconds (1
hour).
b. For Retries, type the number of keepalives for which the TMS zl
Module can fail to receive a reply before it declares the tunnel to be
“down” (1-255).
Figure 7-158. Add GRE Tunnel Window
12. Click OK.
The tunnel is now displayed in the VPN > GRE > GRE Tunnels window.