Specifications

58 New and Enhanced Features in AlliedWare Plus 5.4.4 Major and Minor Versions
Important Considerations Before
Upgrading to this Version
Licensing
From software version 5.4.4-0.4 onwards, AlliedWare Plus software releases need to be
licensed for the SBx908 and SBx8100 switches.
If you are upgrading the software on your SBx908 or SBx8100 switch, please ensure you
have a 5.4.4 license on your switch. To obtain a license, contact your authorized Allied
Telesis support center. You will need to provide the MAC addresses of the switches you
want to license.
For details, see:
■ “Licensing this Software Version on an SBx908 Switch” on page 67 and
■ “Licensing this Software Version on a Control Card for an SBx8100 Series Switch”
on page 69.
Upgrading a VCStack
This software version supports VCStack “reboot rolling” upgrades. With the reboot
rolling command, you can reduce downtime when upgrading a VCStack.
You can use the reboot rolling command to upgrade to 5.4.4-1.1 from any 5.4.4-0.x
version.
However, if you want to use the reboot rolling command to upgrade from any 5.4.3-x.x
version to 5.4.4-1.1, you must upgrade to 5.4.4-0.x first.
Forming or extending a VCStack
If you create a VCStack from switches that are running different software versions, auto-
synchronization ensures that all members will run the same software version when they
boot up.
However, auto-synchronization is not supported between all versions of 5.4.4. The
following table lists compatible versions:
Before you add a new switch to a stack, make sure the new switch’s version is compatible
with the stack’s version. If the new switch is running an incompatible version, it cannot
join the stack until you have manually upgraded it.
ISSU (In-Service Software Upgrade)
This software version does not support ISSU: You cannot use ISSU to upgrade to this
minor software version.
If the existing VCStack is running ... then a new member can join the VCStack if it is running ...
any 5.4.4-0.x version any 5.4.4-0.x version
5.4.4-1.1 or 5.4.4-1.2 5.4.4-1.1 or 5.4.4-1.2