# 3.2.1-r5 to 5.0.3-r4 upgrade

**URL:** <https://community.cambiumnetworks.com/t/3-2-1-r5-to-5-0-3-r4-upgrade/104874>\
**Category:** cnMatrix\
**Created:** [April 7, 2025, 1:29pm UTC](https://community.cambiumnetworks.com/t/3-2-1-r5-to-5-0-3-r4-upgrade/104874 "2025-04-07T13:29:01Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![djdrastic](https://d10gw3vjmzyp8.cloudfront.net/letter_avatar_proxy/v4/letter/d/0ea827/32.png) [@djdrastic](https://community.cambiumnetworks.com/u/djdrastic)\
**Post date:** [April 7, 2025, 1:29pm UTC](https://community.cambiumnetworks.com/t/3-2-1-r5-to-5-0-3-r4-upgrade/104874/1 "2025-04-07T13:29:01Z")

</div>

Have a customer in a very remote/secluded site that had their switches lose cnMaestro access due to CA changes for cnMaestro Cloud.  
What is the upgrade procedure to get them from 3.2.1-r5 codebase to 5.x codebase to get them back as active on cnMaestro ?

---

<div class="post-metadata">

**Author:** ![Nemallapudi\_Indrared](https://d10gw3vjmzyp8.cloudfront.net/user_avatar/community.cambiumnetworks.com/nemallapudi_indrared/32/29413_2.png) [@Nemallapudi\_Indrared](https://community.cambiumnetworks.com/u/Nemallapudi_Indrared)\
**Post date:** [April 9, 2025, 12:06pm UTC](https://community.cambiumnetworks.com/t/3-2-1-r5-to-5-0-3-r4-upgrade/104874/2 "2025-04-09T12:06:31Z")

</div>

Hi @djdrastic,

Please follow the upgrade path: 3.2.1-r5 → 4.4-r3 → 5.0.3-r4. Initially, try the upgrade on a single device, and if everything works fine, proceed with the rest.

//Indra

---

<div class="post-metadata">

**Author:** ![djdrastic](https://d10gw3vjmzyp8.cloudfront.net/letter_avatar_proxy/v4/letter/d/0ea827/32.png) [@djdrastic](https://community.cambiumnetworks.com/u/djdrastic)\
**Post date:** [April 9, 2025, 2:44pm UTC](https://community.cambiumnetworks.com/t/3-2-1-r5-to-5-0-3-r4-upgrade/104874/3 "2025-04-09T14:44:23Z")

</div>

Thanks  
Boarding a flight soon to go and have a look at it.  
Hopefully it goes well.

---

<div class="post-metadata">

**Author:** ![Nemallapudi\_Indrared](https://d10gw3vjmzyp8.cloudfront.net/user_avatar/community.cambiumnetworks.com/nemallapudi_indrared/32/29413_2.png) [@Nemallapudi\_Indrared](https://community.cambiumnetworks.com/u/Nemallapudi_Indrared)\
**Post date:** [April 10, 2025, 6:25am UTC](https://community.cambiumnetworks.com/t/3-2-1-r5-to-5-0-3-r4-upgrade/104874/4 "2025-04-10T06:25:25Z")

</div>

Hi @djdrastic ,  
If you’re seeing cnMaestro connectivity issues, it’s likely due to incorrect system time on the device. This causes certificate validation to fail. Make sure NTP is configured correctly so the device has the right time."