i need to upgrade the ios for these 2 nexus devices. Currently they are running on 6.0.2, how i can check which 7x version should i use ?

  BIOS:      version 3.6.0
  loader:    version N/A
  kickstart: version 6.0(2)N2(3)
  system:    version 6.0(2)N2(3)
  Power Sequencer Firmware: 
             Module 1: version v1.0
             Module 2: version v1.0
  Microcontroller Firmware:        version v1.2.0.1
  SFP uC:    Module 1: v1.0.0.0
  QSFP uC:   Module not detected
  BIOS compile time:       05/09/2012
  kickstart image file is: bootflash:///n5000-uk9-kickstart.6.0.2.N2.3.bin
  kickstart compile time:  12/17/2013 2:00:00 [12/17/2013 12:52:59]
  system image file is:    bootflash:///n5000-uk9.6.0.2.N2.3.bin
  system compile time:     12/17/2013 2:00:00 [12/17/2013 16:02:31]

  cisco Nexus5548 Chassis ("O2 32X10GE/Modular Universal Platform Supervisor")
  Intel(R) Xeon(R) CPU         with 8253856 kB of memory.
  Processor Board ID FOC16125CZ7

   bootflash:    2007040 kB

Kernel uptime is 993 day(s), 18 hour(s), 36 minute(s), 2 second(s)

Last reset 
  Reason: Unknown
  System version: 6.0(2)N2(3)

  Core Plugin, Ethernet Plugin

Software seems identical, just the second device of the pair has

 Power Sequencer Firmware: 
             Module 1: version v1.0
             Module 2: version v1.0
             Module 3: version v5.0
  • You need to look at kickstart and the system image. Everything else will be updated if necessary by the system when it reboots.
    – user36472
    Jul 26 '17 at 8:30
  • Did any answer help you? If so, you should accept the answer so that the question doesn't keep popping up forever, looking for an answer. Alternatively, you can provide and accept your own answer.
    – Ron Maupin
    Feb 19 '18 at 16:58

On a Nexus environment you need to update both kickstart and system image when upgrading to a whole new software train. Currently version 7.1(4)N1(1) is safe harbor.

Under hardware, you can see which specific version, your Nexus is and thereby find the correct software on Cisco download center.

  cisco Nexus5548 Chassis ("O2 32X10GE/Modular Universal Platform Supervisor")

I looked for Nexus5548 and since all different versions of the same switch uses the same software, it's pretty straight forward.

Installation is carried out like this for both kickstart and system:

install all kickstart ftp: system ftp:

You can use several different forms of transfer to the switch. I just added ftp as an example. Upgrading the software will automatically upgrade any modules or other hardware on the switch. The system will decide if an upgrade is necessary. Typically it's done if a module has bugged firmware or lacks security features or bugs etc. The upgrade procedure is carried out upon reboot by the software upgrade process.

Kickstart. Kickstart

System. enter image description here

The star symbol besides the software indicates that Cisco has marked it as safe harbor and therefore is safe to use. You should always stick to safe harbor software.

  • Thank you for your reply, i checked one by one the tables "Table 2 Upgrade/Downgrade Impact" and i saw the latest version i can upgrade is 7.0(7)N1(1) - if i go in a newer version of this, its not supporting upgrade from current version 6.0(2)N2(3) Link for 7.0(7)N1(1) is: cisco.com/c/en/us/td/docs/switches/datacenter/nexus5500/sw/… and if you try to check the next link of the list that goes to 7.0(8)N1(1), 6.0(2)N2(3) is not inside.
    – Mars
    Jul 26 '17 at 9:49
  • @Mars The upgrade from-to list is only if you want to use ISSU (In service software upgrade). If you just want to upgrade so can still do a full upgrade, but your systems will not be available when the system restarts.
    – user36472
    Jul 26 '17 at 10:20
  • Thank you for your reply, yes i want to do upgrade without timewindow for downtime., so i guess i need to go from the list, maximum ios upgrade 7.0(7)N1(1). Another very important question is how do i know if i need to upgrade the power controller also ?
    – Mars
    Jul 26 '17 at 10:35
  • @Mars the power controller will be upgraded by the system if it's necessary, when you initiate the upgrade procedure. Firmware for all modules and controllers are in the system and/or kickstart package.
    – user36472
    Jul 26 '17 at 10:41

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