When configuring
for high availability, consider that the Load Balancer machine is supported
with the following limitations or special considerations:
- If you are using IPv6 protocol on your machine and want to use high availability,
you must check to see if protocol 58 is defined to be ICMPv6 in the protocol
file.
- In the high availability configuration, both primary and backup machines
must be on the same subnet with identical configuration.
- The heartbeat pairs (which is the mechanism between the primary and standby
Dispatchers to detect Dispatcher failure) must be both IPv4 format or both
IPv6 format.
- In a high availability or a stand-alone environment, you must not alias
the cluster address against the network adaptor.
- The HighAvailChange script can be moved from the install_root/servers/samples directory to the install_root/servers/bin directory
to log high availability state changes for the Dispatcher machine, but this
script does not need to be changed.