Disassembling An Omnitouch Acs Stack - Alcatel-Lucent OmniTouch Administration Manual

System Configuration
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State
IN PROGRESS
CONNECTED

Disassembling an OmniTouch ACS stack

It may be necessary to remove individual OmniTouch ACS servers from a stack, or to
remove, replace, or reconfigure the Ethernet backplane. Because the stack is continuously
replicating the state between the primary and secondary servers, some caution should be
taken in removing servers. This section offers some guidelines.
At all times, the node IDs for all servers interconnected through a stack backplane (even if
stacking is disabled) MUST be unique. If servers are interconnected that have the same
node ID, duplicate users and/or conferences can result, as well as mis-routed traffic. This
situation may require hands-on intervention by support to remedy, and may even
necessitate clearing the stack's database completely.
If for some reason you change a server's node ID, be aware that all existing conference
access codes on the server become invalid (the node ID is the first two digits of the code).
Therefore, the database on both the secondary and primary application servers should be
cleared (see the
Removing and adding pure media servers (as opposed to the primary or secondary
application servers) from the stack may be done at any time, while the stack is still
operating. PSTN trunks should first be quiescent (no activity) (see Trunk status). If the
stack is statically configured, make sure that the IP address is configured correctly when
the server is returned to the stack.
To disassemble a stack completely, change each server's stack name. There is no need to
reconfigure node IDs, and the stack may be easily reassembled.
Data Replication is designed to operate continuously once it is enabled. If it is disabled at
any time, the secondary application server's database should be cleared before replication
is re-enabled.
Either the primary Application Server or the secondary Application Server can be
removed from the stack at any time. If both are absent, no calls or IMs may be made and
system is nonfunctional.
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Definition
Servers are trying to
establish database
replication.
Database replication is
working.
page).
Data Replication
Disassembling an OmniTouch ACS stack
8AL90208USAD ed01
November 20, 2008