Update a Stack of c9500

[JoaoLeca]

Hello,

I have a stack of 2 switches cisco c9500-16x. I want to update de firmware version from the 16.9.5 to the 17.6.5.

1)What is the best update path?

2)Can I just go to the new version directly?

3)Can I update 1 switch and then update the other so I don't have any down time?

[balaji.bandi]

If this is part of the Stackwise Virtual  -

You can directly go 17.6.5 (read the release notes any caveats effect your environment) - May it upgraded to ROMMON part of upgrade.

Always take and config back up out of the box, so you can compare any issue after upgrade not working ?

release notes :

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9500/software/release/17-6/release_notes/ol-17-6-9500.html

[DanielP211]

Before trying ISSU you have to check the ISSU upgrade path. In you case it won't work. With ISSU there is no path from 16.9.5 to 17.6.5. So I would go with the classic install method, and you can do it directlly, but you will have some downtime.

The process is as follows. 
Copy the image to bootflash, using a USB/TFTP.
And use the following command.
install add file bootflash:cat9k_lite_iosxe.17.03.07.SPA.bin activate commit

BR

[JoaoLeca]

Hello sorry for my delay awnsering.

One of the switches on the stack is not booting up. Im considering doing a factory reset on that switch and then add it again to the switch. If i do that this way will I have any downtime?

[balaji.bandi]

One of the switches on the stack is not booting up

Do you have any Logs ? as long as you have dual connectivity to end device, and you mentioned not working (so might be stuck at ROMMON - console and check the status)

Sure you can build - make sure switch number are correct. (the one not working sure was primary or secondary)

how to build SVL :

https://www.balajibandi.com/?p=931

[JoaoLeca]

Hello,

Sorry for being late to awnser I had some time to search but nothing came up. This is what happens when I try to boot.

boot: attempting to boot from [flash:packages.conf]
boot: reading file packages.conf
#
###################################################################################################################################################################################################################################################################################################################################################

Sep 2 13:04:36.397: %PMAN-5-EXITACTION: C0/0: pvp: Process manager is exiting:
exitr
exit
end
reload
Sep 2 13:04:46.737: %PMAN-3-PROCHOLDDOWN: R0/0: pman: The process platform_mgr has been helddown (rc 134)
Sep 2 13:04:46.775: %PMAN-0-PROCFAILCRIT: R0/0: pvp: A critical process platform_mgr has failed (rc 134)
Sep 2 13:04:46.810: %PMAN-3-RELOAD_RP: R0/0: pvp: Reloading: Switch will be reloaded

Chassis 1 reloading, reason - Non participant detected
Sep 2 13:04:48.872: %PMAN-5-EXITACTION: F0/0: pvp: Process manager is exiting: reload fp action requested
Sep 2 13:04:50.205: %PSep 2 13:04:50.882: %PMAN-3-PROCESS_NOTIFICATION: R0/0: pvp: System report /crashinfo/system-report_local_20230902-130450-Universal.tar.gz (size: 1807 KB) generated

Initializing Hardware...

System Bootstrap, Version 16.12.2r, RELEASE SOFTWARE (P)
Compiled Wed 10/23/2019 16:35:17.50 by rel

Current ROMMON image : Primary
Last reset cause : CpuReset
C9500-16X platform with 16777216 Kbytes of main memory

I then made a USB boot flash to see if it was a corrupted software image. But the outcome was the same.

This switch doesn't boot up and I cant change the dirrectories.

switch: copy usbflash0:cat9k_iosxe.16.09.05.SPA.bin flash:user/packages.conf
Write access to "flash:" unsupported.
Unsupported destination device/filesystem.

[balaji.bandi]

Just want some clarification :

is the switch still connected to SVL Links ?

is other switch upgraded to New IOS XE ?

if other switch upgrae to latest IOS XE  - then Isolate the switch having issue, removing all the Links and try to Upgrade - is this work ?

Can you post show version from the Primary switch ?

[JoaoLeca]

He is configured in a SVL Link but is now isolated, no connections. I downloaded from the Cisco website the same IOS as the other switch on the stack. The first switch is 16.09.05. I cant load th image from the usb to the switch.

[balaji.bandi]

May be you you hitting the bug seems to be :

https://bst.cisco.com/bugsearch/bug/CSCvo85575