Symptom
Upgrade from 9.3.2 to 9.3.5 fails via ISSU with the below error
switch# install all nxos bootflash:nxos.9.3.5.bin
Installer will perform compatibility check first. Please wait.
Installer is forced disruptive
Verifying image bootflash:/nxos.9.3.5.bin for boot variable "nxos".
[####################] 100% -- SUCCESS
Verifying image type.
[####################] 100% -- SUCCESS
Preparing "nxos" version info using image bootflash:/nxos.9.3.5.bin.
[####################] 100% -- SUCCESS
Preparing "bios" version info using image bootflash:/nxos.9.3.5.bin.
[####################] 100% -- SUCCESS
2020 Aug 13 01:52:01 switch %$ VDC-1 %$ %USER-0-SYSTEM_MSG: ISSU ERROR: confcheck status indicates error, error no: 2. - new_installer
[####################] 100% -- FAIL.
Return code 0x40930028 (Compatibility checks with running-config failed).
Pre-upgrade check failed. Return code 0x40930066 (SRG processing failed).
switch# 2020 Aug 13 01:52:03 switch %$ VDC-1 %$ %USER-0-SYSTEM_MSG: ISSU ERROR: srg processing failed (0x 40930028) - new_installer
2020 Aug 13 01:52:03 switch %$ VDC-1 %$ %FW_APP-2-FIRMWARE_IMAGE_LOAD_SUCCESS: sysmgrcb_system_upg_done
Conditions
This is being seen as of now under 2 situations:
1. Perform an downgrade from 9.3.5 to 9.3.2 and then perform an upgrade via ISSU to 9.3.5
2. While in 9.3.2
a. Disable the guestshell
b. set the boot variable to 9.3.2 (if not set)
c. copy r s
d. write erase
e. Reload
3. After the reload when the switch comes up, "show guestshell detail" will show it in "Installing state".
4. Any ISSU from 9.3.2 to 9.3.4 or 9.3.5 will fail
