topic Query on code upgrade on 3500 and 5500 in HA setup in Wireless

Query on code upgrade on 3500 and 5500 in HA setup

andags — Mon, 05 Jul 2021 19:05:29 GMT

Hi Team,

I have 2 setups that need a code upgrade.

Two 3504 in HA system

Two 5508 in HA system.

I have some questions on code upgrade in HA mode:

1. As far as I understand you have to perform upgrade only on the primary and the second one will be automatically taken care of. My question is before resetting the system is there a way to verify if image is pushed to secondary controller without console access? If yes how to check?

2. Also in one of my system, the secondary is the active controller now. Should I do a "redundancy force-switchover" first, bring back the primary as main controller and then do upgrade?

3. Could you please list the steps that happen during WLC upgrade in HA . Like when the image is pushed to secondary, when image goes to APs. How to reset the system? Only reset on primary will help or bothe systems needs to be reloaded?Both the WLC should reboot at the same time?

Thanks for your Help!

Re: Query on code upgrade on 3500 and 5500 in HA setup

Leo Laohoo — Tue, 26 May 2020 06:53:42 GMT

@andags wrote:

Also in one of my system, the secondary is the active controller now.

Use the command "reset system force" to reboot both simultaneously.

@andags wrote:

Could you please list the steps that happen during WLC upgrade in HA .

Upload the firmware to the controllers and instruct the APs to pre-download the image.

WARNING:

When upgrading from early 8.X.X.X to the recent version (from 8.5.X.X and later) the AP 2700/3700 will do what we call as a "double-download". It doesn't matter if one does the pre-download the AP will download and reboot TWICE. The only way to stop this from happening is to force the AP to "final" image and then reboot the controllers.

Re: Query on code upgrade on 3500 and 5500 in HA setup

Mark Elsen — Tue, 26 May 2020 07:08:50 GMT

>1. As far as I understand you have to perform upgrade only on the primary and the second one will be automatically taken care of. My question is before resetting the system is there a way to verify if image is pushed to secondary controller without console access? If yes how to check?

- Use the CLI to execute the upgrade procedure; you will then have a clear view of what happens including the steps of what's done on the secondary controller.

2. Also in one of my system, the secondary is the active controller now. Should I do a "redundancy force-switchover" first, bring back the primary as main controller and then do upgrade?

Yes that is advisable in order to streamline procedures. Note that redundancy force-switchover just and only reboots the box

AP's get new image when the HA-pair is rebooted. reset system on primary will reboot both controllers after an upgrade has been done and or the controller should indeed be rebooted at the same time. Check more info below (you can also have a look at the options of the 'reset system' command to be able to check a reboot out of office hours, for instance)

https://www.cisco.com/c/en/us/support/docs/wireless-mobility/wireless-lan-wlan/68835-wlc-upgrade.html#anc10

Re: Query on code upgrade on 3500 and 5500 in HA setup

andags — Wed, 27 May 2020 07:55:30 GMT

Thank you