Cisco Nexus 5000 Series and Cisco Nexus 2000 Series Release Notes, for Cisco NX-OS Release 5.0(2)N1(1) and NX-OS Release 5.0(2)N2(1) OL-22747-02, December 2010)

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Cisco Nexus 5000 Series and Cisco Nexus 2000 Series Release Notes, for Cisco NX-OS Release 5.0(2)N1(1) and NX-OS Release 5.0(2)N2(1)
OL-22747-02
Upgrading or Downgrading to a New Release
• Upgrading from NX-OS Release 4.2(1) to NX-OS Release 5.0(2) is a nondisruptive upgrade
(ISSU).
• Upgrading from a Cisco NX-OS Release 4.2(1)-based release to NX-OS Release 5.0(2)N1(1) is
nondisruptive.
• Downgrading from Cisco NX-OS Release 5.0(2)N1(1) to a previous release is disruptive.
Upgrading the Power Sequencer on the Cisco Nexus 5010 and Cisco Nexus
5020 Switches
Under certain conditions, a voltage spike that exceeds the system voltage guard band and glitch filter
settings may result in a power cycle of the system mezzanine board which results in the failure of ports
on the mezzanine board. To solve the issue, you need to upgrade to Cisco NX-OS Release 5.0(2)N1(1)
and makes sure that the power sequencer has been upgraded to v1.2 using the show version command.
Follow the power sequencer upgrade procedure to upgrade the power sequencer to v1.2 and to
workaround CSCsy21017 and CSCth33969.
If you upgrade the switch to Cisco NX-OS Release 5.0(2)N1(1), but do not power cycle the switch
following this procedure, even though the switch has instructions for the power sequencer upgrade, the
power sequencer is not upgraded. The show version command output displays a v1.2 power sequencer,
but that only indicates that the power sequencer upgrade instructions have been programmed. If you
cannot confirm a power cycle, Cisco recommends that you perform a power off/on to ensure the power
sequencer is upgraded.
To upgrade the power sequencer with Cisco NX-OS Release 5.0(2)N1(1), follow these steps:
Note A power sequencer upgrade is not necessary if you already upgraded to an earlier version that includes
the Power Sequencer v1.2, for example Cisco NX-OS Release 4.2(1).
Step 1 Download the Cisco NX-OS Release 5.0(2)N1(1) kickstart and system image to the system.
Step 2 Enter the install all kickstart kickstart_url system system_url command to start and upgrade to the
Cisco NX-OS Release 5.0(2)N1(1). When prompted to confirm the upgrade, review the upgrade table
and select y to proceed.
After completing the installation, the system reloads and displays a Cisco NX-OS Release 5.0(2)N1(1)
image.
Step 3 Repeat Step 2 to reinstall the Cisco NX-OS Release 5.0(2)N1(1) image. During this process, the upgrade
table should display the upgrade action for the power sequencer and then upgrade the power sequencer.
Step 4 After the installation is complete, power cycle the switch. The power sequencer is not updated until a
power cycle is completed.
Step 5 After the system comes up, confirm that the power sequencer has been upgraded by issuing the show
version command.The show version command only confirms if the power sequencer has the updated
instructions. The upgrade does not take effect until the switch is power cycled.