Issu Restrictions; Issu Prerequisites - HP 5920 series Fundamentals Configuration Manual

Table 13 Comparison between the two command series
Item
Required compatibility
between the old and new
software versions
Support installing and
uninstalling patches?
Upgrade mode
Effect scope of the
upgrade operation
Technical skill
requirements

ISSU restrictions

If the IRF fabric has only one member and the reboot method is used, service interruption is unavoidable.
For service continuity during an ISSU, make sure the IRF fabric has multiple members, and all members
are connected into a ring topology and are operating correctly.
If the switching fabric modules support sequential upgrade, the device must have at least two correctly
operating switching fabric modules.
You must log in to the device through the console port. If you use Telnet or SSH, you might be
disconnected from the device before the ISSU is completed.
For a successful ISSU, you must make sure the device is not in the process of a hardware upgrade and
does not have a hardware problem.

ISSU prerequisites

To prepare for an ISSU:
Read the software release notes to identify the following items:
•
The software images to be used for the upgrade.
Their compatibility with one another.
Their compatibility with the software images running on the device.
The command series to be used for the upgrade.
Licensing requirement for the new software images.
Use the display device command to verify that the system is operating correctly. If there are any
•
problems with the system, troubleshoot the system before performing an ISSU.
Verify that the storage media on the IRF members have enough free space for the new image files.
•
Use the save command to save the running configuration.
•
issu series commands
Compatible or incompatible.
No.
Upgrade an IRF fabric as per
member device.
Large.
Low.
110
install series commands
Compatible.
Yes.
Advanced upgrade mode. Upgrade the
system as per member device.
Small.
High. Administrators must have a
profound understanding of the system and
the effects of each upgrade action.