Troubleshooting guide

8 — 5620 SAM system redundancy
8-14 Alcatel-Lucent 5620 Service Aware Manager
5620 SAM
System Administrator Guide
The following occur when the primary station becomes unresponsive:
• The standby server detects the connectivity loss and becomes the primary server.
• The new primary server raises alarms about the unavailability of the former
standby server and about the activity switch.
• If automatic database realignment is enabled, the new primary server initiates a
database switchover.
• When connectivity is restored, the former primary server assumes the standby
server role.
Distributed system, standby server unreachable
Figure 8-13 shows a a distributed system in which the standby server is unreachable.
Figure 8-13 Standby server unreachable, distributed system
The following occur when the standby station becomes unresponsive:
• The standby server interprets the primary server unresponsiveness as a primary
server failure, so attempts to assume the primary server role.
• The primary server generates an alarm to indicate that the standby server is down.
• When the reachability is restored, the standby server resumes the standby role and
the alarm clears.
Distributed system, managed network unreachable by primary side
Figure 8-14 shows a managed network connection failure on the primary side of a
distributed 5620 SAM system.
Primary database
Primary main
server
Standby database
Standby main
server
24118
Connectivity
loss
Managed
network
Release 13.0 R2 | May 2015 | 3HE 09815 AAAB TQZZA Edition 01