Troubleshooting guide

8 — 5620 SAM system redundancy
8-16 Alcatel-Lucent 5620 Service Aware Manager
5620 SAM
System Administrator Guide
Figure 8-15 Split complex, collocated or distributed system
The following occur after the connectivity loss is detected:
• The initial primary server and database roles do not change; the initial primary
server continues to manage the network. The client sessions are not interrupted.
• The primary server raises an alarm about the communication failure.
• The standby server and database switch roles to become a second primary server
and database.
• New clients connect to the initial primary server; however, if a client explicitly
tries to connect to the second primary server, a session is established.
• When the servers regain contact:
• If the network disruption also isolates one server from the managed NEs, the other
server and database remain the primary.
• Otherwise, the server that has currently held the primary role for longer remains the
primary, and the other server and database assume the standby role,
Initial primary side
Primary database
Primary main
server
Primary main
server
Connectivity
loss
24120
Managed
network
Primary database
Initial standby side
5620 SAM GUI and OSS clients
Release 13.0 R2 | May 2015 | 3HE 09815 AAAB TQZZA Edition 01