Control Subnet Configuration - Crestron Electronics 4 Series Product Manual

Control Subnet Configuration

For increased security, the device supports a mode of operation called isolation mode. In
isolation mode, the firewall is preconfigured to limit access to the Control Subnet, port mapping
between the primary network and devices on the Control Subnet are blocked, and manual
configuration of port forwarding is not available. To configure isolation mode, issue the following
command:
isolatenetworks [state]
state - {ON | OFF}
l
No parameter - Displays the current setting
l
Example: isolatenetworks on
Control Subnet Router Configuration
By default, the Control Subnet router is configured to use 10.0.0.0/8 for the Control Subnet. If
the device detects that the primary network is using that network address, the device will
automatically switch to using 172.22.0.0/16 for the Control Subnet. To verify if the device is
automatically choosing the Control Subnet address, issue the CSINAutoMode command. To
confirm what address is being used, issue the ipconfig command to show the addresses
assigned to the device's network interfaces.
If the control system will use a specific network address, that address can be configured using
the following command:
CSRouterPrefix [IP_Address/Prefix_Size]
IP_Address - The desired IP address
l
Prefix_Size - The number of leading bits of the routing prefix
l
No parameter - Displays the current Control Subnet configuration
l
Example: CSRouterPrefix 192.168.0.0/24
Control Subnet DHCP Configuration
By default, the device provides a DHCP server on the Control Subnet to issue IP addresses for
anything connected to the Control Subnet. IP addresses that have been issued can be displayed
by using the DHCPLeases command.
The DHCPLeases command will return a list of IP address that have been issued and information
about them.
In addition, specific IP addresses can be assigned to specific devices on the Control Subnet. This
can be done by issuing the following command:
RESERVEDLeases [ADD | REM | CLEAR_ALL]
ADD - Adds an IP address to a device using the following syntax: MAC_Address IP_
l
Address Description
Product Manual — Doc. 8559B 4-Series™ Control Systems • 187