Any multiplex where all servers are not at the same version is a mixed-version multiplex. Upgrading Sybase IQ from version 12.5 to 12.6, for example, typically results in a mixed-version multiplex for a short period.
Please see “Before You Install” in Chapter 1 of the Sybase IQ Installation and Configuration Guide for details about running multiple IQ Agents on a mixed-version multiplex.
