Cisco Cisco MDS 9000 NX-OS Software Release 7.3 Notas de publicación

This section lists the guidelines recommended for downgrading your Cisco MDS NX-OS software image and includes the 
following topics:

Follow these general guidelines before you perform a software downgrade:

Issue the system no acl-adjacency-sharing EXEC command to disable ACL adjacency usage on Generation 2 modules 
(Cisco MDS 9500 Directors). Generation 2 modules or switches can have one or more ports in port groups that share 
common resources such as bandwidth and buffer credits. If this command fails, reduce the number of zones, IVR zones, 
TE ports, or a combination of these in the system and issue the command again. 

Disable all features not supported by the downgrade release. Use the show incompatibility system downgrade-image 
command to determine what you need to disable. 

Use the show install all impact downgrade-image command to determine if your downgrade will be nondisruptive. 

Be aware that some features impact whether a downgrade is disruptive or nondisruptive:

Fibre Channel Ports: Fibre Channel ports can be nondisruptively downgraded without affecting traffic on the ports. 
See 

Table 5

 for the nondisruptive downgrade path for all SAN-OS releases.

Gigabit Ethernet Ports: Traffic on GigabitEthernet/IPStorage ports is disrupted during a downgrade. This includes 
the Gigabit Ethernet ports on the MDS 9000 16-Port Storage Services Node (SSN-16), IPStorage ports in MDS 9250i, 
MSM-18+4 module, and 24/10 Port SAN Extension Module. Those nodes that are members of VSANs traversing an 
FCIP ISL are impacted, and a fabric reconfiguration occurs. iSCSI initiators connected to the Gigabit Ethernet ports 
lose connectivity to iSCSI targets while the downgrade is in progress.

NX-OS Release 6.2(5b)

You can nondisruptively upgrade directly to NX-OS Release 6.2(11c).

NX-OS Release 6.2(5a)

You can nondisruptively upgrade directly to NX-OS Release 6.2(5b).

NX-OS Release 5.2(2) or 
5.2(2s)

You can nondisruptively upgrade directly to NX-OS Release 6.2(5a) or 
6.2(5b).

NX-OS Release 4.2(7b)

You can nondisruptively upgrade directly to NX-OS Release 5.2(2).

NX-OS Release 4.2(1b)

You can nondisruptively upgrade directly to NX-OS Release 4.2(7b).

NX-OS Release 4.1(1c)

You can nondisruptively upgrade directly to NX-OS Release 4.2(1b).

SAN-OS Release 3.3(1c)

You can nondisruptively upgrade directly to NX-OS Release 4.2(1b).

SAN-OS Release 3.2(2c), 
3.0(3b), 3.0(3), and 3.0(2). 

First upgrade to SAN-OS Release 3.3(1c), and then upgrade to NX-OS 
Release 4.2(1b).