Downgrading from Release 7.x to Release 6.0(2)U6(x)
This section contains an example for downgrading from Release 7.x to Release 6.0(2)U6(3a). Downgrading from Release 7.x to Release 6.0(2)U6(3a) with configuration is not officially supported via install all.
NOTE: While downgrading from release 7.x to 6.0(2)U6(x), by default, you will downgrade to release 6.0(2)U6(3a). From release 6.0(2)U6(3a), you can downgrade further to any 6.0(2)U6(x) release.
CAUTION: Make sure that you store the pre-Release 7.x configuration file for later use.
Complete the following steps to downgrade from Release 7.x to Release 6.0(2)U6(3a):
- Enter the command: write erase
switch# write erase
Warning: This command will erase the startup-configuration.
Do you wish to proceed anyway? (y/n) [n] y
switch#
- Enter the command: write erase boot
switch# write erase boot
Warning: This command will erase the boot variables and the ip-configuration of interface management 0.
Do you wish to proceed anyway? (y/n) [n] y
switch#
- Enter the command: copy <Release 6.0(2)U6(3a)-config> startup-config
switch# copy downgrade startup-config
- Enter the command: install all kickstart <img.kick> system <img.sys> no-save bios-force
NOTE:The no-save option is now required to downgrade from Release 7.x to Release 6.x. The bios-force is a hidden option that is only available on Cisco Nexus 3000 Series switches that are running 7.x releases.
switch# install all kickstart n3000-uk9-kickstart.6.0.2.U6.3.bin system n3000-uk9.6.0.2.U6.3.bin no-save bios-force
Installer will perform compatibility check first. Please wait.
Installer is forced disruptive.
Verifying image bootflash:/n3000-uk9-kickstart.6.0.2.U6.3.bin for boot variable "kickstart".
[####################] 100% -- SUCCESS
Verifying image bootflash:/n3000-uk9.6.0.2.U6.3.bin for boot variable "system".
[####################] 100% -- SUCCESS
Verifying image type.
[####################] 100% -- SUCCESS
Preparing "system" version info using image bootflash:/n3000-uk9.6.0.2.U6.3.bin.
[####################] 100% -- SUCCESS
Preparing "kickstart" version info using image bootflash:/n3000-uk9-kickstart.6.0.2.U6.3.bin.
[####################] 100% -- SUCCESS
Preparing "bios" version info using image.
[####################] 100% -- SUCCESS
Performing module support checks.
[####################] 100% -- SUCCESS
Notifying services about system upgrade.
[####################] 100% -- SUCCESS
Compatibility check is done:
Module bootable Impact Install-type Reason
------ -------- -------------- ------------ ------
1 yes disruptive reset Hitless upgrade is not supported
Images will be upgraded according to following table:
Module Image Running-Version(pri:alt) New-Version Upg-Required
------ ---------- ---------------------------------------- -------------------- ------------
1 system 7.0(3)I3(1) 6.0(2)U6(3a) yes
1 kickstart 7.0(3)I3(1) 6.0(2)U6(3a) yes
1 bios v3.1.0(05/26/2015) v2.7.0(10/15/2013) no
Switch will be reloaded for disruptive upgrade.
Install is in progress, please wait.
Performing runtime checks.
[####################] 100% -- SUCCESS
Setting boot variables.
[####################] 100% -- SUCCESS
Performing configuration copy.
[####################] 100% -- SUCCESS
Module 1: Refreshing compact flash and upgrading bios/loader/bootrom.
Warning: please do not remove or power off the module at this time.
[####################] 100% -- SUCCESS
Converting startup config.
[####################] 100% -- SUCCESS
Finishing the upgrade, switch will reboot in 10 seconds.
switch#
The ASCII-replay of Release 6.0(2)U6(3a) configuration brings the switch up with the desired configuration and the Release 6.0(2)U6(3a) image.
5. To verify whether the boot variables exist, enter the command: show boot. If the boot variables do not exist, enter the following set of commands to update the boot variables manually:
switch# configure t
switch (config)# boot kickstart <img.kick>
switch (config)# boot system <img.sys>
switch (config)# copy run start
NOTE: If lockup occurs on the switch, do a tftp boot.