Netlink Advanced Features - NEC UNIVERGE SV9100 Manual

Part 2: VoIP Manual 131
2.6.1.1

NetLink Advanced Features

Netlink Advanced Features
Fail-Over
An added feature of NetLink is the Fail-Over feature. If the Primary System is turned off or disconnected,
without the Fail-Over feature, all communication servers would stop working. With Fail-Over, one of the
Secondary Systems, depending on the SV9100 programming, will take over as the Primary System
allowing the other linked nodes to continue functioning.
Enable Fail-Over by changing KeepAlive Response Waiting Time in Easy Edit – Advanced Items/VoIP/
Networking/NetLink/NetLink Timers (PRG51-05-02) to 20 seconds.
Automated Primary System Integration
This feature allows the Primary System to always take back control of the network automatically after it has
been unavailable.
E.g. If the Primary System had a power failure, one of the Secondary Systems would take over as the
Primary (if Fail-Over is enabled). Without this feature enabled, when the original Primary System comes
back on line, it would continue to run as a Secondary. This operation may be undesireable, so, if Primary
System Automatic Integration is enabled it would take over as the Primary System once it is back on line.
It is enabled using Automated Primary System Integration in Easy Edit – Advanced items/VoIP/
Networking/NetLink/NetLink Replication. (PRG51-06-01)
There is an option System Package Reset Method in Easy Edit – Advanced items/VoIP/Networking/
NetLink/NetLink Replication (PRG51-06-02) to wait until all cards are idle before the system resets or to do
it immediately.
Fail-Over must be enabled for this feature to work.
Enforced Primary Integration
If Automated Primary System Integration is not used (see above), it is possible to manually select a new
Primary System by entering the GPZ-IPLE IP address of the new Primary System into a programming
command.
This feature must be enabled in Easy Edit – Advanced items/VoIP/Networking/NetLink/NetLink
Replication. (PRG51-07-01)
Enforced Primary Integration should only be used when Primary Candidate Priority is in use or when the
the Top Priority System is unavailable.
To change the Primary System, enter programming mode (handset only). Enter PRG51-08-01, type in the
GPZ-IPLE IP address of the system you wish to be the Primary and press Transfer. The system will reset
and the change will take place.
Database Replication
Once NetLink is operational, the database can be replicated from the Primary system to the Secondary
system(s). This database will be used if a Fail Over condition occurs.
The database Replication can be done by time of day or by interval. This is controlled by the Replication
options in Easy Edit – Advanced items/VoIP/Networking/NetLink/NetLink Replication
If Database Replication is not used and a Fail-Over condition occurs, the new Primary System will use the
configuration that was stored in its own GCD-CP10 for the whole NetLink database. This means that the
database is completely different from the original config.