Agent switching between a primary monitoring server and
a secondary monitoring server is a common feature in IBM Tivoli Monitoring
environments. The IBM Tivoli Monitoring firewall gateway feature also
has the capability to provide failover mechanisms for connectivity.
Attention: You cannot use agent switching on the agents
that host the firewall gateway.
There are two configuration types for the setup of the KDE_GATEWAY:
- Redundant configuration
- Failover configuration
Redundant configuration
Redundant configuration
uses no firewall redundancy, but uses a secondary monitoring server
connection (CT_CMSLIST) in the configuration file of the agent to
allow multiple connections. This configuration uses the proven logic
in the agent to determine when it should switch to another monitoring
server if it loses the primary connection.
Failover configuration
Starting with redundant
configuration as a base model, you can add failover capability to
the gateways in the trusted zones. There is additional capability
in this set up. Failover configuration adds a layer of resilience
to the upstream gateways and proxy agent client requests to either
of the two available Tivoli Enterprise Monitoring Servers. This configuration
is completed in the gateway XML configuration files.
To access the
XML files that you need for this configuration, as well as the topology
diagrams and more information about firewall gateway redundancy, go
to http://www-01.ibm.com/support/docview.wss?uid=swg21643483.