Installing and Configuring ISA Enterprise Servers
After all the preconfiguration via the CSS has been performed, the actual installation of
ISA Server 2006 Enterprise Edition can be accomplished. Many of the same design factors
that applied to the Standard version also apply to the Enterprise version, but it is useful to
review these prerequisites and best practices before installing ISA.
Satisfying ISA Server Installation Prerequisites
ISA Server 2006 Enterprise version has the same hardware prerequisites as the Standard
version, with Microsoft recommending a minimum of 256MB of RAM, a 550MHz Pentium
II, and 150MB of disk space to operate. That said, an Enterprise deployment of ISA Server
should never be installed on hardware as limited as that, and additional RAM (1GB or
more), faster processors, and more disk space will invariably be needed.
It is difficult to pin down the exact hardware that will be required, but ISA itself does not
require much in terms of resources. Performance metrics allow for up to a T3 of network
input into an ISA server before an additional server is needed, so it is not common to run
into performance issues when a system is properly sized.
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