Cisco Cisco MDS 9000 NX-OS Software Release 4.2 Release Notes
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m
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Cisco MDS 9000 Family Release Notes for Cisco MDS NX-OS Release 4.2(7e)
OL-19964-12
Downgrading Your Cisco MDS SAN-OS Software Image
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The Fabric Shortest Path First (FSPF) timers must be configured to the default value of 20 seconds;
otherwise, the nondisruptive upgrade is blocked to ensure that the maximum down time for the
control plane can be 80 seconds.
otherwise, the nondisruptive upgrade is blocked to ensure that the maximum down time for the
control plane can be 80 seconds.
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If there are any CFS commits in the fabric, the nondisruptive upgrade will fail.
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If there is a zone server merge in progress in the fabric, the nondisruptive upgrade will fail.
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If a service terminates the nondisruptive upgrade, the show install all failure-reason command can
display the reason that the nondisruptive upgrade cannot proceed.
display the reason that the nondisruptive upgrade cannot proceed.
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If there is not enough memory in the system to load the new images, the upgrade will be made
disruptive due to insufficient resources and the user will be notified in the compatibility table.
disruptive due to insufficient resources and the user will be notified in the compatibility table.
Performing a Disruptive Upgrade on a Single Supervisor MDS Family Switch
Cisco MDS SAN-OS software upgrades are disruptive on the Cisco MDS 9216i switch, which has a
single supervisor. If you are performing an upgrade on this switch, you should follow the nondisruptive
upgrade path shown in
single supervisor. If you are performing an upgrade on this switch, you should follow the nondisruptive
upgrade path shown in
, even though the upgrade is disruptive. Following the nondisruptive
upgrade path ensures that the binary startup configuration remains intact.
If you do not follow the upgrade path, (for example, you upgrade directly from SAN-OS Release 2.1(2)
or earlier version to NX-OS Release 4.2(x)), the binary startup configuration is deleted because it is not
compatible with the new image, and the ASCII startup configuration file is applied when the switch
comes up with the new upgraded image. When the ASCII startup configuration file is applied, there may
be errors. Because of this, we recommend that you follow the nondisruptive upgrade path.
or earlier version to NX-OS Release 4.2(x)), the binary startup configuration is deleted because it is not
compatible with the new image, and the ASCII startup configuration file is applied when the switch
comes up with the new upgraded image. When the ASCII startup configuration file is applied, there may
be errors. Because of this, we recommend that you follow the nondisruptive upgrade path.
Note
You cannot upgrade an MDS 9120 switch or an MDS 9140 switch to Cisco NX-OS 4.x. See
for
the list of switches that support Cisco NX-OS 4.x.
Resetting SNMP Notifications Following an Upgrade
The SNMP notification configuration resets to the default settings when you upgrade to Cisco NX-OS
Release 4.2(1b). Use the snmp-server enable traps command to reenable your required SNMP
notifications.
Release 4.2(1b). Use the snmp-server enable traps command to reenable your required SNMP
notifications.
Converting Automatically Created PortChannels Before an Upgrade
Before upgrading from NX-OS Release 4.1(x) or 4.2(x) to Release 5.x, ensure that you do not have any
automatically created PortChannels present in the switch configuration. Use the port-channel
persistent command to convert an automatically created PortChannel to a persistent PortChannel.
Failure to convert automatically created PortChannels prior to the upgrade can result in traffic
disruption because Autocreation of PortChannels is a deprecated feature as of NX-OS Release 4.1(1b).
automatically created PortChannels present in the switch configuration. Use the port-channel
persistent command to convert an automatically created PortChannel to a persistent PortChannel.
Failure to convert automatically created PortChannels prior to the upgrade can result in traffic
disruption because Autocreation of PortChannels is a deprecated feature as of NX-OS Release 4.1(1b).
Downgrading Your Cisco MDS SAN-OS Software Image
This section lists the guidelines recommended for downgrading your Cisco MDS SAN-OS software
image and includes the following topics:
image and includes the following topics:
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