HP ProCurve - Overview; Terminology

Redundancy (Switch 8212zl)
Overview
Overview
Redundancy provides the ability to keep your switch operating by using dual
management modules, one active module and one standby module. In the
event of a failure, the currently active management module will switchover to
the standby management module, which then becomes the active
management module.
The advantages of redundant management are:
■ Maintaining switch operation if a hardware failure occurs on the active
management module
■ Minimizing restart time because of failure on a management module
■ Hotswapping a failed management module with no downtime
■ Allowing a faster software upgrade process (less downtime) when updat-
ing software versions
Note The fabric modules are resilient to each other; you need both modules enabled
for 100% performance. With one module enabled you will have 50%
performance, but most networks operate at less than 50% utilization. The
modules can be individually enabled or disabled. See “Enabling and Disabling
Fabric Modules” on page 15-12.
Terminology
Redundant management uses the following terminology.
Active Management Module. A management module that booted
successfully and is actively managing the switch.
Standby Management Module. A management module that is ready to
become the active management module if the active management module
fails.
Failed Management Module. A management module that did not pass
selftest or did not boot properly and is not in standby mode.
Offline Management Module. A management module that is offline
because redundancy is disabled.
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