Cisco Catalyst 3560-X Series, Руководство по настройке программного обеспечения

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Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-25303-03
Chapter 1 Managing Switch Stacks
Understanding Switch Stacks
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Auto-copy automatically copies the software image running on any stack member to the switch
in VM mode to upgrade (auto-upgrade) it. Auto-copy occurs if auto-upgrade is enabled, if there
is enough flash memory in the switch in VM mode, and if the software image running on the
switch stack is suitable for the switch in VM mode.
Note
A switch in VM mode might not run all released software. For example, new switch
hardware is not recognized in earlier versions of software.
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Automatic extraction (auto-extract) occurs when the auto-upgrade process cannot find the
appropriate software in the stack to copy to the switch in VM mode. In that case, the auto-extract
process searches all switches in the stack, whether they are in VM mode or not, for the tar file
needed to upgrade the switch stack or the switch in VM mode. The tar file can be in any flash
file system in the switch stack (including the switch in VM mode). If a tar file suitable for the
switch in VM mode is found, the process extracts the file and automatically upgrades that
switch.
The auto-upgrade (auto-copy and auto-extract) processes wait for a few minutes after the
mismatched software is detected before starting.
When the auto-upgrade process is complete, the switch that was in VM mode reloads and joins the
stack as a fully functioning member. If you have both StackWise Plus cables connected during the
reload, network downtime does not occur because the switch stack operates on two rings.
Note
Auto-upgrade performs the upgrade only when the two feature sets are the same type. For example, it
does not automatically upgrade a switch in VM mode from IP services feature set to IP base feature set
(or the reverse).
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Automatic advise (auto-advise) occurs when the auto-upgrade process cannot find appropriate stack
member software to copy to the switch in VM mode. This process tells you the command (
archive
copy-sw or archive download-sw privileged EXEC command) and the image name (tar filename)
needed to manually upgrade the switch stack or the switch in VM mode. The recommended image
can be the running switch stack image or a tar file in any flash file system in the switch stack
(including the switch in VM mode). If an appropriate image is not found in the stack flash file
systems, the auto-advise process tells you to install new software on the switch stack. Auto-advise
cannot be disabled, and there is no command to check its status.
The auto-advise software does not give suggestions when the switch stack software and the software
of the switch in VM mode do not contain the same feature sets. For example, if the switch stack is
running the IP base image and you add a switch that is running the IP services image, the auto-advise
software does not provide a recommendation.
You can use the archive-download-sw /allow-feature-upgrade privileged EXEC command to
allow installing an different software image.
Auto-Upgrade and Auto-Advise Example Messages
When you add a switch that has a different minor version number to the switch stack, the software
displays messages in sequence (assuming that there are no other system messages generated by the
switch).
This example shows that the switch stack detected a new switch that is running a different minor version
number than the switch stack. Auto-copy starts, finds suitable software to copy from a stack member to
the switch in VM mode, upgrades the switch in VM mode, and then reloads it: