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56
C
4: U
HAPTER
SING
Default Behavior
RSTP Default
Behavior
Fast Start Default
Behavior
R
F
ESILIENCE
EATURES
This section contains important information to note when using the RSTP
and Fast Start features, particularly if you already have existing Switch
4400 units in your network with an older version of software.
When using the RSTP feature on version 2.0 or later software, note the
following:
A Switch with version 2.0 factory loaded will have RSTP enabled by
default.
A Switch with version 1.0 software will have STP disabled by default.
A Switch that you upgrade to version 2.0 software will retain its
settings from prior to the upgrade, for example, if STP is disabled prior
to the upgrade, it will stay disabled even though version 2.0 has RSTP
enabled by default. However, if you initialize an upgraded Switch, this
will clear the settings and the Switch will then assume all the version
2.0 default settings, including RSTP enabled.
If you connect a new Switch with version 2.0 already loaded to a stack
of upgraded units, all the upgraded units will assume the default
settings of the new Switch, that is, they will have RSTP enabled by
default.
When using the Fast Start feature on version 2.0 or later software, note
the following:
A Switch with version 2.0 factory loaded will have Fast Start enabled
by default on the front panel ports, and disabled on any expansion
module ports.
A Switch with version 1.0 software will have Fast Start disabled by
default.
A Switch that you upgrade to version 2.0 software will retain its
settings from prior to the upgrade only if any manual settings were
configured. However, if the Switch was still operating in its default
state, then upon upgrade it will assume version 2.0 Fast Start default
settings.
If you initialize an upgraded Switch, this will clear the settings and the
Switch will assume all the default version 2.0 settings, that is, it will
have Fast Start enabled.
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