我需要为这 2 个 nexus 设备升级 ios。目前它们在 6.0.2 上运行，我如何检查我应该使用哪个 7x 版本？

Software
  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]


Hardware
  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)
  Service: 

plugin
  Core Plugin, Ethernet Plugin

软件似乎相同，只是该对中的第二个设备具有

 Power Sequencer Firmware: 
             Module 1: version v1.0
             Module 2: version v1.0
             Module 3: version v5.0