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Parallel Upgrade
Parallel Upgrade with I/O Modules
Starting with Cisco NX-OS Release 5.2(1), multiple linecards can be simultaneously upgraded, and the infrastructure support is available. This decreases the ISSU time when compared with an ISSU upgrade that is done serially (one card at a time).
To start a parallel upgrade, use the following command: install all kickstart image system image parallel
Up to three linecards can be upgraded in parallel with this command. During the upgrade process, the upgrade of the linecards is displayed in the output as follows:
Non-disruptive upgrading.
[# ] 0%
Module 5 upgrade completed successfully.
.
Module 3 upgrade completed successfully.
.
Module 6 upgrade completed successfully.
.
Non-disruptive upgrading.
[####################] 100% -- SUCCESS
Non-disruptive upgrading.
[# ] 0%
Module 9 upgrade completed successfully.
.
Non-disruptive upgrading.
[####################] 100% -- SUCCESS
Note
This command will be ignored for a downgrade to a release below Cisco NX-OS Release 5.2.(1).
Parallel Upgrade with Fabric Extenders
Beginning with Cisco NX-OS Release 6.1(1), a parallel upgrade on the Fabric Extenders (FEX) is supported if the user types the parallel keyword in the command. You can perform a parallel upgrade of 10 FEXs at a time.
For releases prior to Cisco NX-OS Release 6.1(1), only a serial upgrade of FEXs is supported. The upgrade process switches to a serial upgrade even for the I/O modules present. Even if the user types the parallel keyword in the command, the upgrade will be a serial upgrade.
Prerequisites for Upgrading the Cisco NX-OS Software
Upgrading the Cisco NX-OS software has the following prerequisite:
Save, commit, or discard any active configuration sessions before upgrading or downgrading the Cisco NX-OS software image on your device. On a device with dual supervisors, the active supervisor module cannot switch over to the standby supervisor module during the Cisco NX-OS software upgrade if you have an active configuration session. On a device with a single supervisor module, the Cisco NX-OS software deletes the active configuration session without warning when you reload the device.
Use the show configuration session summary command to verify that you have no active configuration sessions.
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