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BGAN 9201 User Manual
NAT
VS
R
ELAY
M
ODE
The Interface status field indicates the network mode of operation of the terminal.
N
AT
M
ODE
In
NAT mode
once a PDP context is active, the UT will translate between the local and global IP
addresses. This is a basic NAT that only performs IP address translation. It does not use port
translation.
R
ELAY
M
ODE
In
Relay mode
the UT will supply the global IP address to the TE when the context is established.
Relay mode is single user and only supports a single connected TE.
In Relay mode DHCP is required to provide the global IP address to the TE. When the context is
activated, the DHCP server in the UT will NACK the next DHCP lease renewal from the TE and
assign the global IP address assigned by the network. The local IP connection will be torn down
and reestablished as the IP address changes. Similarly, when the context is deactivated the
DHCP server will NACK the lease renewal and then reassign the original private IP address.
LaunchPad and the Web UI will lose and reestablish their connections to the terminal as the IP
address is changed.
To make the IP address change happen quickly a short DHCP lease should be used. The terminal
defaults the lease time to 60 seconds in idle and connected mode. (Web UI Setup page.)
Note that Relay mode only supports a single user TE.
