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Cisco MDS 9000 NX-OS Software and Firmware Upgrade and Downgrade Guide, Release 9.x

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Updated:: August 15, 2025

Chapter: New and Changed Information

New and Changed Information
New and Changed Information

New and Changed Information

New and Changed Information

Table 1. New and Changed Features
Feature	Description	Changed in Release	Where Documented
Upgrade to 9.x releases	Updated upgrade paths to 9.x releases	--	Supported Cisco MDS NX-OS Software Nondisruptive Upgrade Paths
Upgrade and Downgrade to FICON-qualified 9.4(3b)	Added for FICON qualification on 9.4(3b)	9.4(3b)	FICON Nondisruptive Upgrade Paths to Cisco MDS NX-OS Release 9.4(3b) FICON Nondisruptive Downgrade Paths from Cisco MDS NX-OS Release 9.4(3b)
Upgrade and Downgrade to 9.4(4)	Added for 9.4(4) release	9.4(4)	Nondisruptive Upgrade Paths to Cisco MDS NX-OS Release 9.4(4) Nondisruptive Downgrade Paths from Cisco MDS NX-OS Release 9.4(4)
Preventing SAN Analytics corruption	Added for CSCwo03706.	9.4(4)	Preventing SAN Analytics Corruption during ISSU
Upgrade and Downgrade to 9.4(3b)	Added for 9.4(3b) release	9.4(3b)	Nondisruptive Upgrade Paths to Cisco MDS NX-OS Release 9.4(3b) Nondisruptive Downgrade Paths from Cisco MDS NX-OS Release 9.4(3b)
Upgrade and Downgrade to 9.4(3a)	Added for 9.4(3a) release	9.4(3a)	Supported Cisco MDS NX-OS Software Nondisruptive Upgrade Paths Supported Cisco MDS NX-OS Software Nondisruptive Downgrade Paths
Upgrade and Downgrade to 9.4(3)	Added for 9.4(3) release	9.4(3)	Supported Cisco MDS NX-OS Software Nondisruptive Upgrade Paths Supported Cisco MDS NX-OS Software Nondisruptive Downgrade Paths
Upgrade and Downgrade to 9.4(2a)	Added for 9.4(2a) release	9.4(2a)	Supported Cisco MDS NX-OS Software Nondisruptive Upgrade Paths Supported Cisco MDS NX-OS Software Nondisruptive Downgrade Paths
Transceivers Firmware Upgrade	This chapter is added.	9.4(2)	Upgrading Transceiver Firmware

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