NEC Univerge SV9100 Manual page 518

Issue 2.0
The Primary System is selected based on the Primary Candidate Order and System
ID. The decision for the new Primary System is based first on the value of the
Primary Candidate Order. The lower the number, the higher the priority. If the value is
the same number, the System ID is then checked.
Netlink has been enhanced with PRG 51-18-01 (Netlink Fail Over Limit). This setting
allows the system to be programmed for the maximum number of specified times that
Fail Over occurs before the Secondary Systems remain in Stand Alone mode (Own
Primary). Settings are 0: Infinity and 2~10. The following is an example when PRG
51-18-01 has a setting of "4".
Once the specified number of Fail-Over times have been reached, the Secondary
Systems will remain in stand alone mode until the Forced Change Primary System
Enabling (PRG-51-07-01) and IP Address of New Primary System (PRG-51-08-01)
are performed.
If the communication server database is set up as follows, System ID 2 becomes the
new Primary System.
SV9100 Networking Manual
Figure 10-5 PRG 51-18-01 with setting of "4"
System ID
Program 51-01-01
1
2
3
4
Primary Candidate Order
Program 51-01-02
30
30
30
30
10-31