Overview
This article will explain how the internal ICSLAN networks should be configured when connecting the main LAN port of an NX master to an ICSLAN port of another NX master when creating a separate ICSLAN AV network.
Why do they need configuring?
By default, all internal ICSLAN networks are set to the IP range 198.18.x.x with a 255.255.0.0 subnet and a DHCP server to allocate IP addresses to any devices you connect to it.
The default ICSLAN IP address of each master is 198.18.0.1
In situations where an ICSLAN port of one master is used to create a separate AV network, connecting other NX master LAN ports to this network will result in that master's LAN and ICSLAN addresses being in the 198.18.x.x range, and can cause internal communication issues.
The image below details an example setup.
Master 1 - LAN port - connected to main corporate network switch with an IP on client network
ICSLAN port - connected to ICSLAN network switch and acts as a DHCP server and communication to other masters
Master 2 - LAN port - connected to ICSLAN switch and given IP address from Master 1's DHCP server
ICSLAN port - not used
Master 3 - LAN port - connected to ICSLAN switch and given IP address from Master 1's DHCP server
ICSLAN port - not used
Master 4 - LAN port - connected to ICSLAN switch and given IP address from Master 1's DHCP server
ICSLAN port - not used
Configuration
To allow the setup above to function, there needs to be a change to the ICSLAN setup.
In a situation where there are only 2 masters, you can change the ICSLAN setup on either unit.
Note: The ICSLAN octets can only be changed on the NX-22/32/4200 series, not the DVX or DGX so you should bare this in mind when configuring your system topology.
In the above setup, as there are multiple masters on the ICSLAN network, it would make sense to change the ICSLAN IP range of Master 1, rather than changing it on Masters 2, 3 and 4 and any subsequent masters that may be added.
The ICSLAN settings on a master can be configured via a telnet session using the 'SET ICSLAN' command.
As an example, set Master 1's ICSLAN IP range from 198.18.x.x to 192.168.x.x (This must be different from the Client LAN IP range). The master's ICSLAN IP address will now be 192.168.0.1 and Masters 2, 3 and 4 will now obtain a DHCP address in the 192.168.x.x range.