topic Re: Panorama HA Pair and Managed Log Collectors Upgrade Process - Clarification in General Topics

Panorama HA Pair and Managed Log Collectors Upgrade Process - Clarification

nohash4u — Thu, 12 Mar 2026 19:53:21 GMT

Hello All,

Planning an upgrade of a Panorama HA pair in management-only mode with two dedicated log collectors to PAN-OS 11.1.x from PAN-OS 10.2.x

To assist with the explanation below:

Unit A - Panorama Active Unit
Unit B - Panorama Passive Unit

First, after reviewing the upgrade documentation (Upgrade Panorama in an HA Configuration ) for Panorama and the log collectors, I understand the upgrade procedure as:

Unit B is upgraded first referencing Upgrade Panorama Without an Internet Connection.
Failover from A to B post-upgrade of unit B.
Unit A is then upgraded.
Log collectors are then upgraded simultaneously.
Full commit and push from unit A post-upgrade after the log collectors have been upgraded. The push is to all managed devices.

My confusion arises from Upgrade Panorama Without an Internet Connection referencing the need to update the log collectors during the unit B upgrade process, which if you follow the thread would result in the log collectors being updated before unit A is upgraded. Is this an incorrect interpretation?

Second, if moving from version 10.2.x to 11.1.x, can I still skip PAN-OS versions on the log collectors (meaning the upgrade path would be directly 10.2.x to 11.1.x)?

Lastly, what happens to logs sent to log collectors when they are in the process of upgrading? Per Upgrade Log Collectors When Panorama Is Not Internet-Connected: log collectors must be upgraded simultaneously.

Any insight into these queries is much appreciated!

Cheers,

Nohash4u

Re: Panorama HA Pair and Managed Log Collectors Upgrade Process - Clarification

reaper — Fri, 13 Mar 2026 12:10:42 GMT

- follow the process of upgrading panorama fully (both peers) before starting the collectors (there is a possibility of running the primary panorama upgraded and then upgrading the collectors before upgrading passive panorama, but why risk it)

- you can skip directly from 10.2. to 11.1

- while the log collector is unavailable, logs are queued on the firewalls until the collector is available again. unless your log volume is enormous, or the backbone between firewall and collector is already taxed (so log transfer is limited) you shouldnt lose any logs. there may be a bit of a delay in receiving 'live' logs while the firewall works through the backlog

Re: Panorama HA Pair and Managed Log Collectors Upgrade Process - Clarification

nohash4u — Fri, 13 Mar 2026 14:15:59 GMT

@reaper many thanks for the quick reply, and clarification!

Cheers