L-IP User Manual
48
LOYTEC
Version 6.1
LOYTEC electronics GmbH
3 - NAT Address
If the L-IP is used behind a NAT router the public IP address of the NAT router or firewall
must be entered. To completely disable the NAT router support, enter the IP address 0.0.0.0
when requested to enter the NAT address.
4 - Channel name
The menu item allows setting a channel name that can consist of up to 15 characters.
The number of channel members is shown below the channel name.
Channel Mode
This field reflects the current channel mode. The L-IP configuration server automatically
determines this mode depending on if there are any two devices in the channel which use
the same IP address but different ports (e.g. multiple L-IPs behind one NAT router). If all
IP addresses are unique the mode is “Standard”, if some are not unique the mode is
“Extended NAT mode”. Please refer to Section 7.3.2 to learn more about the implications
of this mode.
5 - Primary SNTP server, 5 - Secondary SNTP server
The two menu items allow setting the IP address of the primary and secondary SNTP time
server used for the CEA-852 communication. Please specify one or better 2 SNTP servers if
CEA-852 devices are communicating over the Internet rather than an Intranet. A list of
available timeservers can be found at
6 - Channel Timeout
This menu item allows setting the channel timeout. The channel timeout is an IP-852
channel property and indicates how old a packet can be before it is discarded. The channel
timeout is set in ms. To disable the channel timeout enter a value of 0. To select the proper
value please consult Section 7.5. Setting a channel timeout other than 0 requires a valid
SNTP server entry on the configuration server.
7 - Auto members support
This menu item allows members to be automatically added to the channel. If turned on,
CEA-852 devices can register on the IP-852 channel without the device being explicitly
added on the configuration server. This special feature is useful in combination with the
LPA-IP since it can add itself to the configuration server during the debug session. Non-
responding auto members are automatically removed from the channel. This feature is
turned off by default and must be explicitly turned on.
Use this option with care because new CEA-852 devices can add themselves to the channel
without knowledge of the system operator. This could cause a potential security hole.
8 - Roaming members support
This menu item allows tracking CEA-852 devices when their IP address changes. This
feature must be turned on if DHCP is used and the DHCP server can assign different IP
addresses to the same device (same Neuron-ID). In combination with Auto-NAT L-IPs can
also be operated behind NAT routers, which change their IP address between connection
setups. For more information on this topic refer to Section 7.3.1.
The roaming member feature is turned on by default. It is recommended to turn off this
feature if DHCP is not used or if the DHCP server always assigns the same IP address to a
given MAC address.