topic Re: Cisco 2504 Software upgrade in Wireless

Cisco 2504 Software upgrade

Imm — Fri, 20 May 2022 06:40:03 GMT

Hello,

We have 2 Cisco 2504 WLC which are configured in N+1 HA mode. I would like to upgrade the firmware. As I assume firstly I need to upgrade secondary unit reboot it and then upgrade primary because there is no auto-synchronization between units?

Re: Cisco 2504 Software upgrade

balaji.bandi — Fri, 20 May 2022 07:23:50 GMT

Technically that should work :

what is exciting version, and what version are you looking to upgrade to, read the release notes ;

follow below guide :

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

Re: Cisco 2504 Software upgrade

Imm — Fri, 20 May 2022 07:28:33 GMT

Correct me if I am wrong but Cisco 2504 supports only N+1 HA without AP-SSO.

Do I need to upload firmware to the both units?

Re: Cisco 2504 Software upgrade

Arshad Safrulla — Fri, 20 May 2022 07:28:27 GMT

Hi Upgrades are well documented in Cisco official documentation, you may follow the below

Wireless LAN Controller (WLC) Software Upgrade - Cisco

However points to keep in mind;

1. Upgrade the secondary WLC first, make sure it is up and running

2. Upload the new image to primary WLC and pre-download the image to all the AP's.

3. Reboot the primary WLC and it will boot with new AireOS.

Things to make sure (prerequisites);

1. Read the release notes to check

- FUS upgrade is required Release Notes for Cisco Wireless Controller Field Upgrade Software for Release 2.0.0.0 - Cisco

- AP model compatibility in new AireOS Cisco Wireless Solutions Software Compatibility Matrix - Cisco

- Any recommended upgrade path from the existing code to the new code.

- AP flash issues (certain AP's require flash repair to be done before the upgrade) Understanding Various AP-IOS Flash Corruption Issues - Cisco

2. Read the TAC recommended AireOS to choose the new code

Re: Cisco 2504 Software upgrade

Imm — Fri, 20 May 2022 08:29:59 GMT

I just want to summarize steps:

First I need to upload firmware to the second unit, reload it, wait while it is up and running. Then upload firmware to the primary unit, do pre-download of firmware for AP-s and then reload re primary unit, correct?

Do I need reload AP-s after pre-download or it will be done automatically?

Re: Cisco 2504 Software upgrade

Arshad Safrulla — Fri, 20 May 2022 07:59:17 GMT

Yes, you need to upload the new AireOS image/FUS image to both WLC's.

Re: Cisco 2504 Software upgrade

Imm — Fri, 20 May 2022 08:30:24 GMT

@Arshad Safrulla Am I correct?

Re: Cisco 2504 Software upgrade

Arshad Safrulla — Fri, 20 May 2022 08:48:17 GMT

When you reload the active wlc it will fall back to the standby wlc (provided that your ap’s have primary and secondary wlc wmi’s configured) at this point of time ap’s will reload and join the standby wlc on until primary wlc comes back online.

Re: Cisco 2504 Software upgrade

balaji.bandi — Fri, 20 May 2022 09:15:19 GMT

You need to reload Primary first , then it fail back to seconday. then later secondary (active) will be reloaded.