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Connecting HA Servers to the Switch
CentreVu
CMS R3V8 High Availability
Connectivity, Upgrade and Administration
Overview 2-2
2. Customized software switch-over
If the HA primary and secondary servers connect to CMS clients
and other peripherals, such as NTS servers, printers, etc. over the
same network subnet, LAN traffic on this “user” network can be
automatically redirected from the primary to the secondary server by
means of customized scripting tools. The scripts, which are set up
by PSO, create an alias for the IP address of the primary server on
the secondary server.
3. Manual server switch-overs
If the customer is unable to connect the two HA servers to the “user”
network via a common network subnet, the custom software switch-
over solution offered by the PSO can not be implemented.
Therefore, if the customer still desires uninterrupted access to their
CMS data, the server switch-over must be performed manually.
At a minimum, manual switch-over entails editing of host
configuration files on the secondary server and re-administration of
CMS supervisor clients by their individual users in order to redirect
them from the primary to secondary server.
Depending on the nature of the customer network, additional
measures may be required, such as re-administration (or
duplication) of NTS servers, physical reconnection of peripheral
devices, etc. Customers considering the manual switch-over option
must be strongly encouraged to consult with their TSO and/or PSO
representatives in order to discuss logistical issues associated with
manual server switch-overs.
Basic
Configuration
Rules
2
CMS HA servers must be physically located in the same building, and
ideally, should be directly adjacent to each other in order to facilitate ease
of maintenance.
CMS HA computers can collect data from up to eight different ACDs.
Mixed ACD links, in which the server is connected to both single
(standard CMS) ACD links and HA dual links, is not supported. If
implemented, mixed ACD links could potentially result in significant call
data loss, and could also fill up system error logs with meaningless data.
Link connections are implemented only by the TCP/IP over ethernet LAN
communications protocol, and connections must run over LAN facilities
local to the switch.
Each CMS HA server should be connected to a separate UPS on a
separate protected power circuit.