Troubleshooting guide

TD 92735EN
15 May 2012 / Ver. G
Installation and Operation Manual
Unite Connectivity Manager
59
4.12 Redundancy
A redundant system consists of an active module and a standby module. When setting up
the redundancy in the system, the primary Unite CM will act as an active module, and the
secondary Unite CM will act as a standby module. If the active module failures, the system
will automatically switch to the standby module that becomes an active module. The
modules will indicate that the system no longer is redundant since no data synchronization
between the modules can be performed.
Prerequisites
In order to set up redundancy in Unite CM, the following requirements must be fulfilled:
• The hardware variant (Elise3 Lite or Elise3 Standard) must be identical on both the
primary- and secondary module.
• The installed software version (4.xx or higher) must be identical on both modules.
• The Unite CMs must use the same type of SD card of minimum 1 GB capacity. Refer to
Data Sheet, Unite Connectivity Manager, TD 92739EN for more information on which SD
cards that currently are supported.
• The primary Unite CM must have the license with redundancy functionality installed.
• The secondary Unite CM must not have any licenses installed.
• RS232 Data Splitter. Only required if you want to connect equipment via serial interface
(for example external equipment via TAP, ESPA or Line protocol).
• Three static IP-addresses. Ask your network administrator to obtain the IP-addresses.
TIP: See also Prepare IP-addresses to be used in a Redundancy System (Recommended).
Prepare IP-addresses to be used in a Redundancy System (Recommended)
NOTE: It is assumed that your system already have one Unite CM installed and that an
additional Unite CM will be installed in order to set up a redundancy system.
The three static IP-addresses will be used as follows;
• two IP-addresses will be used by the primary- and secondary Unite CM
• the third IP-address will be used by the equipment (for example IP-DECT Base Stations,
VoWiFi handsets etc.) to interact with the active Unite CM when the system has become
redundant. In this document, the third IP-address will be called "virtual IP-address".
To avoid changing the configured Unite IP-address in the equipment that will interact with
the active Unite CM, follow the instructions below:
Network without DCHP Server
1 Replace the IP-address in the origin Unite CM with the static IP-address to be used by
the primary module. The replaced IP-address can now be used as virtual IP-address
by the external equipment.
2 Make sure the other Unite CM to be used as secondary module has been assigned
correct IP-address.
Network with DCHP Server
1 Make sure that the origin IP-address of the Unite CM no longer is reserved to the
Unite CM’s MAC address. Note the IP-address still must be available but not reserved
to a specific MAC address. Consult your network administrator. This IP-address will be
used as virtual IP-address later on.