Instruction manual

Chapter 3: High Availability
3-2 NetScaler 9000 Series Installation and Configuration Guide - Volume 1
NSICG60_JAN05
specified time period, it determines that the primary NetScaler 9000 system is
not functioning normally and fail over occurs.
After the fail over, all client connections must be re-established but the
session persistence rules are maintained as they were before fail over.
Note: If the web server logging feature is enabled after fail over this feature
remains enabled on the NetScaler that has taken over as primary. That
is, no log data is lost due to failure of the primary NetScaler. For this
scenario the log server configuration must carry entries for both the
NetScaler systems in the log.conf file.
Figure 3-1 shows a network configuration that uses the high availability
feature. Hubs may be used instead of switches.
Note: If hubs are used, check the interface and duplex settings on the
NetScaler 9000system
Figure 3-1 NetScaler 9000 system in High Availability mode