Specifications

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Catalyst 4500 Se ries S wit ch C is co IO S C om mand R efer ence —Re lease I OS XE 3 .3.0 XO(1 5.1 (1)XO)
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Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches
show issu comp-matrix
show issu co mp-matrix
To display information regarding the In Service Software Upgrade (ISSU) compatibility matrix, use the
show issu comp-matrix command.
show issu comp-matrix {negotiated | stored | xml}
Syntax Description
Defaults This command has no default settings.
Command Modes User EXEC mo de
Usage Guidelines Before attempting an ISSU, you should know the compatibility level between the old and the new Cisco
IOS software versions on the active and the standby supervisor engines. ISSU will not work if the two
versions are incompatible.
The compatibility matrix is available on Cisco.com so that you can also veiw in advance whether an
upgrade can be perform ed with th e ISSU proc ess. The comp atibility matrix during the ISSU process and
later by entering the show issu comp-matrix command. To display information on the negotiation of the
compatibility matrix data between two software versions on a given system, use the show issu
comp-mat rix negotiated command.
Compatibility matrix data is stored with each Cisco IOS software image that supports ISSU capability.
To display stored compatibility matrix information, use the show issu comp-matrix stored command.
The compatibility matrix information are built-in any Cisco IOS ISSU image. The ISSU infrastructure
performs a matrix lookup as soon as th e communication with the sta ndby supervisor eng ine is
established. There are three possible results from the lookup operation:
• Compatible—The Base-level system infrastructure and all optional HA-aware subsystems are
compatible. In-service upgrade or downgrade between these versions will succeed with minimal
service impact.
• Base-Level Compatible—One or more of the optional HA-aware subsystems are not compatible.
Although an in-service upgrade or dow ngrade between these versions will succeed, some
subsystems will not be able to maintain their state during the switchover. Prior to attempting an
in-service upgrade or downgr ade, the impact o f this o n opera tion and service of th e switch must b e
considered carefully.
• Incompatible—A set of core system infrastructure must be able to execute in a stateful manner for
SSO to function correctly. If any of these “required” features or subsystems is not compatible in two
different Cisco IOS images, the two versions of the Cisco IOS images are declared “Incompatible”.
This means that an in-service upgrade or downgrade between these versions is not possible. The
systems operates in RPR mode during t he period when the versions of Cisco IOS at the active and
standby supervisor engines diff er.
negotiated Displays negotiated compatibility matrix information.
stored Displays stored compatibility matrix information.
xml Displays negotiated compatibility matrix information in XML format.