Troubleshooting guide

8 — 5620 SAM system redundancy
8-2 Alcatel-Lucent 5620 Service Aware Manager
5620 SAM
System Administrator Guide
8.1 5620 SAM system redundancy overview
5620 SAM system redundancy is initially configured during 5620 SAM installation.
You use the 5620 SAM GUI, or scripts on a 5620 SAM main server, to perform the
following redundancy functions:
• Check the 5620 SAM redundant server and database status.
• Perform a manual activity switch from the primary to the standby main server.
• Enable or disable automatic database realignment.
• Reinstantiate the former primary database as the standby database when an
automatic or manual activity switch occurs and verify its status.
You can configure the following redundancy parameters to specify how a 5620 SAM
system manages a loss of connection to the managed NEs; contact Alcatel-Lucent
technical support for more information:
• the number of elapsed seconds that constitute a loss of connectivity
• how often a main server refreshes the list of managed NEs
• the minimum number of NEs that must respond to a connectivity check
8.2 5620 SAM system redundancy models
You can deploy a 5620 SAM system in a redundant configuration to provide greater
fault tolerance by ensuring that there is no single point of software failure in the
5620 SAM management network. A redundant 5620 SAM deployment consists of
the following components:
• primary and standby 5620 SAM main servers
• primary and standby 5620 SAM databases
The current state of a component defines the primary or standby role of the
component. The primary main server actively manages the network and the primary
database is open in read/write mode. When a standby component detects a primary
component failure, it automatically changes roles from standby to primary. You can
also change the role of a component using the 5620 SAM client GUI or a CLI script.
The 5620 SAM supports collocated and distributed system redundancy. A collocated
system requires two stations that each host a main server and database. A distributed
system requires four stations that each host a main server or database. Each main
server and database is logically independent, regardless of the deployment type.
The primary and standby main servers communicate with the redundant databases
and periodically verify server redundancy. If the standby server fails to reach the
primary server within 60s, the standby server becomes a primary server. See
section 8.4 for information about various 5620 SAM redundancy failure scenarios.
Caution — For increased 5620 SAM system performance and fault
tolerance, Alcatel-Lucent recommends that you deploy the primary
server and database in the same geographical location and LAN.
Release 13.0 R2 | May 2015 | 3HE 09815 AAAB TQZZA Edition 01