Sirius 800 Series User Manual
Single Active IP Addr. on Dual Red. Controllers (Optional)
Nucleus Router Control Modules 14.3
Iss 5 Rev 7
Page 256
© 2017 SAM
14.3 Single Active IP Addr. on Dual Red. Controllers (Optional)
14.3.1 Overview
Default Workbench Controller IP Address Configuration
When two Nucleus control Modules are fitted in a router the default configuration is that each
controller has its own IP address and these IP addresses stay the same whether the
controller is active or idle. Workbench and RollCall work with controllers when they are setup
in this configuration and they detect which controller is active and which is idle.
Single Active/Idle Controller IP Address Configuration
In some situations, such as when a third party control system is fitted, the third party control
system can only communicate with a single IP address on the router it is controlling. In this
case the Nucleus control Modules can be configured so that the active controller is always
IP address X and the idle controller is always IP address Y. Where X and Y represent valid
network addresses for the controllers.
In practice this means if a controller fails or changes over from being active to idle its
IP address will change from the active address to the idle address and vice versa. This allows
the third party control system to continue to use the same IP address (X) no matter which
controller is active.
This configuration is intended for use with third party control systems and cannot be used with
Workbench, RollCall systems or control panels connected over IP.
Supported Nucleus Controller Cards
•
Nucleus2 2464 router control module (all versions)
•
Nucleus2 2463 router control module (version 3.0.2 or later)
•
Nucleus 2450 router control module (version 3.0.2 or later)
14.3.2 Single Active/Idle IP Address Operation
Controller A and B are configured with the same active IP address of X and idle IP address
of Y (X and Y represent valid network addresses)
When the Router is powered on
:
1.
When the router is powered on both controllers will boot simultaneously with
controller A booting as active and controller B booting as idle.
2.
Controller A checks its active/idle state and detects that it is active and so configures
itself with the active IP address X.
3.
Controller B checks its active/idle state and detects that it is idle and so configures
itself with the idle IP address Y.
4.
The control system will talk to the active controller using IP address X or the idle
controller using IP address Y.
If Controller A (the active controller) is reset
:
1.
Controller B will detect the loss of controller A, will automatically switch to run as the
active controller and configure itself with the active IP address X.
2.
The control system will detect a momentary loss of connection to IP address X as
controller A resets and will then re-establish its connection to IP address X (now
controller B which is active).
3.
Controller A will reboot after the reset, check its active/idle status, detect that it is idle
and configure itself with the idle IP address Y.
Note:
If controller B was active and then reset the same process would happen but controller A
would go active and configure itself with the active IP address X.
