Cradlepoint mbr1200 User Manual page 36

User Manual / MBR1200B
the 192.168.0.x range. Alternatively, you could select a single address by inputting that address along with a
Netmask of 255.255.255.255.
Add/Edit Tunnel – Keep Alive
GRE keep-alive packets can be enabled to be sent through the tunnel in order to monitor the status of the
tunnel and more accurately determine if the tunnel is alive or not.
GRE keep-alive packets may be sent from both sides of a tunnel, or from just one side.
Enabled: Select to enable GRE Keep Alive to continually
send keep-alive packets to the remote peer.
Rate: Choose the length of time in seconds for each
check (Default: 10 seconds. Range: 2 – 3600 seconds).
Retry: Select the number of attempts before the GRE
tunnel is considered down or up (Default: 3. Range: 1 –
255).
Failover Tunnel and Failback Tunnel: Use these settings
to create two tunnels – one as the primary tunnel and
one as the backup tunnel. To configure tunnel failover/
failback, complete the following steps:
1. Create two tunnels: one for primary and one for
backup. Make sure both tunnels have Keep Alive
enabled.
2. Choose one to be the primary tunnel. Open the editor for this tunnel and make sure Tunnel Enabled is
selected. Then go to the Keep Alive page. Under Failover Tunnel select the other tunnel you have created.
3. Open the editor for the failover tunnel. Make sure Tunnel Enabled is not selected. On the Keep Alive page,
set the Failback Tunnel to your primary tunnel.
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