Troubleshooting guide

8 — 5620 SAM system redundancy
8-6 Alcatel-Lucent 5620 Service Aware Manager
5620 SAM
System Administrator Guide
Server activity switches
The standby server initiates an automatic server activity switch when it cannot
communicate with the primary server. A 5620 SAM administrator performs a
manual server activity switch, which is typically a planned server maintenance or test
operation. For security reasons, you cannot use a 5620 SAM GUI or OSS client to
perform a server activity switch.
Figure 8-4 shows the server and database roles before an activity switch.
Figure 8-4 Server and database roles before server activity switch
During a server activity switch, a main server does not process SNMP traps, attempt
to synchronize NEs, or collect statistics. Auxiliary servers process outstanding
requests during an activity switch, but do not communicate with a main server.
The following occurs during a server activity switch:
• The primary server raises alarms about the event.
• Each GUI client receives notification of the activity switch and displays a
message about the server unavailability during the activity switch.
Figure 8-5 shows the server and database roles after a successful activity switch.
Figure 8-5 Server and database roles after server activity switch
13463
Primary database Standby database
Read/writes
to primary
Primary
server
17840
Standby
server
13463
Primary database Standby database
Read/writes
to primary
17893
Primary
server
Standby
server
Release 13.0 R2 | May 2015 | 3HE 09815 AAAB TQZZA Edition 01