Product Manual — Doc. 8559B 4-Series™ Control Systems • 185
Control Subnet
Certain 4-Series control system models provide support for a separate network called a Control
Subnet and have one or more network ports specifically for connecting devices to the Control
Subnet.
The Crestron AV4, CP4N, and PRO4 have a dedicated Control Subnet, which allows for dedicated
communication between the control system and Crestron Ethernet devices without interference
from other network traffic on the LAN. The AV4 and PRO4 provide four Control Subnet ports
that also support PoE+ using the optional PW-5430DUS power supply.
CAUTION: Do not connect the CONTROL SUBNET port to the LAN. The CONTROL SUBNET
port must only be connected to Crestron Ethernet devices.
When using the Control Subnet, observe the following:
l
The control system acts as a DHCP server to all devices connected to the Control Subnet
and assigns IP addresses as needed.
l
A DNS server is built in to the control system to resolve host names.
l
Only connect Crestron Ethernet devices to the Control Subnet.
l
The control system operates in isolation mode by issuing the isolatenetworks on
command. When in isolation mode, the firewall is configured so that no communication
can occur between the LAN and devices on the Control Subnet. Using this mechanism,
customers can protect their corporate LAN from devices on the Control Subnet.
l
When in isolation mode, devices on the Control Subnet do not have any resources on the
LAN side. For example, if a touch screen with a SmartObjects® technology object requiring
network access is installed on the Control Subnet, the object will not work.
l
Devices on the LAN do not have access to any devices on the Control Subnet. Crestron
Toolbox also does not have access to these devices when it is connected to the LAN. To
configure devices on the Control Subnet with Crestron Toolbox (outside of runtime), the
computer running Crestron Toolbox must be connected to the Control Subnet.
l
Any NAT/port mapping rules that were previously created do not work when the control
system is in isolation mode.
NOTE: If the control system is running in isolation mode, Crestron Ethernet devices requiring
internet access should not be connected to the CONTROL SUBNET port (directly or
indirectly) and should be instead connected to the LAN.
To Next Page
Loading...
