Issu Using The Four-Command Sequence: Step 1 (Loadversion) - Cisco Catalyst 4500 Series Software Configuration Manual

In-Service Software Upgrade (ISSU) on a VSS
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Switch#
The new version of the Cisco IOS XE software must be present on both of the supervisor engines. The
directory information displayed for each of the supervisor engines shows that the new version is present.
Switch# dir bootflash:
Directory of bootflash:/
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cat4500e-universal.SSA.03.03.00.SGN1.34.151-2.SGN1.34.bin
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cat4500e-universal.SSA.03.03.00.SGN1.33.151-2.SGN1.33.bin
820875264 bytes total (581672960 bytes free)
Switch# dir slavebootflash:
Directory of slavebootflash:/
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cat4500e-universal.SSA.03.03.00.SGN1.33.151-2.SGN1.33.bin
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cat4500e-universal.SSA.03.03.00.SGN1.34.151-2.SGN1.34.bin
822910976 bytes total (583716864 bytes free)
Switch#

ISSU using the Four-command Sequence: Step 1 (loadversion)

This task describes the first step of the ISSU four-command sequence, loadversion, wherein the standby
supervisor engine is loaded with the post-upgrade image.
Please ensure that you have read the
implemented the appropriate steps.
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
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Chapter 5
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Prerequisites to Performing ISSU, page 5-58
Configuring Virtual Switching Systems
section, and