Allied Telesis AT-SBx81CFC960, Installation Manual

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SwitchBlade x8112 Chassis Switch and AT-SBx81CFC960 Card Installation Guide
Section III: Building a Stack with VCStack Plus 281
Optional Feature Licenses
The SwitchBlade x8112 product has two optional feature licenses that
activate additional features on the switch:
 Premium license
 AMF Master license
You may install optional feature licenses while the switches are operating
as stand-alone units or a stack. However, when you are building the stack,
both switches must have the same optional feature licenses. Otherwise,
the two units will not form the stack. So if you install an optional feature
license on one of the switches while it is operating as a stand-alone unit,
you have to install the same feature license on the second unit as well
before building the stack.
Once the two chassis are operating as a stack, you only have to install a
feature license once because the active master controller card
automatically shares it with all the controller cards in the stack.
Here are the guidelines to ordering and installing feature licenses.
 Feature licenses are ordered from Allied Telesis on a per chassis
basis.

A chassis that has two controller cards needs only one feature
license.
 You have to order two features licenses, one for each chassis,
when building a stack, even though you might only use one of the
licenses.
 You may install optional feature licenses either while the switches
are operating as stand-alone units or after they are operating as a
stack.
 If the two chassis don’t have any optional feature licenses or have
the same licenses, you might as well wait until after you build the
stack before installing any additional licenses. That way, you only
have to install one feature license for the entire stack.
 You cannot build a stack of two chassis that have different feature
licenses. You need to remove or install licenses on the switches
before you build the stack, so they both have the same licenses.
For example, if one chassis has the premium feature license while
the second chassis does not, you have to install the premium
license on the second unit while it is operating as a stand-alone
unit.
The instructions in Chapter 15, “Building a Stack” on page 287 explain
how to determine whether the switches have the same feature licenses.