Virtual Private Networks (VPN)
NEMO
LR54 User Guide
579
7. Set the the number of seconds number of seconds until the authorization key expires. This is
provided by your cellular carrier.
(config vpn nemo nemo_example)> lifetime
integer
(config vpn nemo nemo_example)>
Allowed values are any integer between 1 and 65535.
8. MTU discovery is enabled by default, which allows the device to determine the maximum
transmission unit (MTU) size. To disable:
(config vpn nemo nemo_example)> mtu_discovery false
(config vpn nemo nemo_example)>
If disabled, set the MTU size. The default MTU size for LANs on the LR54 device is 1500. The
MTU size of the NEMO tunnel will be smaller, to take into account the required headers.
(config vpn nemo nemo_example)> mtu
integer
(config vpn nemo nemo_example)>
Allowed values are any integer between 68 and 1476.
9. Set the Security Parameter Index (SPI) value, which is used in the authentication extension
when registering. This should be normally left at the default setting of
256
unless your service
provider indicates a different value.
(config vpn nemo nemo_example)> spi
integer
(config vpn nemo nemo_example)>
Allowed values are any integer between 256 and 4294967295.
10. Set the firewall zone for the NEMO tunnel to internal:
(config vpn nemo nemo_example)> zone internal
(config vpn nemo nemo_example)>
The Internal firewall zone configures the LR54 device to trust traffic going to the tunnel and
allows it through the network.
11. Configure the Care-of-Address, the local WAN interface of the internet facing network.
a. Set the method to determine the Care-of-Address:
(config vpn nemo nemo_example)> coaddress type
value
(config vpn nemo nemo_example)>
where
value
is one of:
n
defaultroute
: Uses the same network interface as the default route.
n
interface
If
interface
is used, set the interface:
i. Use the
?
to determine available interfaces:
(config vpn nemo nemo_example)> coaddress interface ?
Interface: Use the IP address of this network interface as
