Cradlepoint IBR600 User Manual page 45

User Manual / IBR600/IBR650
• Routes that allow you to configure what network traffic from local host(s) will be allowed through the
tunnel.
Optionally, you might also want to enable the tunnel Keep Alive feature to monitor the status of a tunnel and
more accurately determine if the tunnel is alive or not.
Click Add to configure a new GRE tunnel; click Edit to make changes to an existing tunnel.
Add/Edit Tunnel – General
Tunnel Name: Give the tunnel a name that
uniquely identifies it.
Tunnel Key: Enables an ID key for a GRE
tunnel, which can be used as an identifier
for mGRE (Multipoint GRE).
Local Network: This is the local side of
the "Glue Network," a network created
by the administrator to form the tunnel.
The user creates the IP address entered
here. It must be different from the IP
addresses of the networks it is gluing
together. Choose any private IP address
from the following three ranges that
doesn't match either network:
• 10.0.0.0 - 10.255.255.255
• 172.16.0.0 - 172.31.255.255
• 192.168.0.0 - 192.168.255.255
Remote Network: This is the remote side
of the "Glue Network." Again, the user
must create an IP address that is distinct from the IP addresses of the networks that are being glued together.
The Remote Network and Local Network values will be flipped when input for the other side of the tunnel
configuration.
Subnet Mask: This is the subnet mask for the Glue Network. The Local and Remote Network addresses must fit
with this mask. 255.255.255.0 is a logical choice for most users.
Remote Gateway: This is the public facing, WAN-side IP address of the network to which the local gateway is
going to connect.
TTL: Set the Time to Live (TTL), or hop limit, for the GRE tunnel.
MTU: Set the maximum transmission unit (MTU) for the GRE tunnel.
WAN Binding: WAN Binding is an optional parameter used to configure the GRE tunnel to ONLY operate when
the specified WAN device(s) are available and connected. An example use case is when there is a router with
both a primary and failover WAN device and the tunnel should only be used when the system has failed over to
the backup connection.
Make a selection for "When," "Condition," and "Value" to create a WAN Binding. The condition will be in the
form of these examples:
When
Port
Type
Condition
Is
Is not
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Value
USB Port 1
WiMax
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