Issu States; Selecting An Issu Upgrade Method - HP A7500 Series Configuration Manual

ISSU states

The ISSU upgrade process is accomplished through the execution of a series of commands, which must
be executed in a specific sequence. The display issu state command displays the current ISSU state,
upgrade version, old version, version compatibility state, and upgrade method to determine the next
operation to be executed. During the ISSU upgrade process, the switch may be in one of the four states
as shown in
Table 11 ISSU state description
State
Init
Load
Switchover
Accept
Commit (the state of the
standby MPU in IRF
mode)

Selecting an ISSU upgrade method

When a new version is uploaded, to check the compatibility between the system software image to be
upgraded and the currently running system software image, use the display version comp-matrix file
upgrading-filename command. Then select the appropriate ISSU upgrade method according to one of
the following version compatibility check results:
Compatible
•
• Incompatible
Same
•
Unknown
•
The following sections describe the ISSU upgrade method for each version.
NOTE:
The version compatibility check for an LPU can have either of the following results:
Hotfix—Upgrades an LPU through a hotfix. The LPU is not rebooted during the upgrade process, and the
data traffic that passes through the LPU is not interrupted.
Reboot—Reboots an LPU to upgrade it. The data traffic that passes through the LPU is interrupted for a
short time during the upgrade process.
Table 1 1.
Description
The ISSU upgrade process has not started yet or an ISSU upgrade process has
completed.
The standby MPU is being upgraded or has been upgraded. The rollback timer is
created successfully and runs normally.
The upgraded standby MPU has become the new active MPU and the LPUs are
being upgraded or have been upgraded.
The upgrading operation of the new active MPU is accepted, and the rollback timer
is automatically deleted. No auto-rollback will be performed during this ISSU
upgrade process.
Multiple standby MPUs are available, and at least one standby MPU has not been
upgraded to the new version. In this state, neither manual nor auto-rollback is
performed during this ISSU upgrade process.
130