Community Firmware Version Recommendations (Q1, 2025)

[Knowguy]

I have frequented this forum lately to get opinions on recommended firmware versions. I would like to start a conversation for us to post in our current reccommeneded MX firmware versions here in an attempt to help everyone in picking a new firmware when having issues with their current.

As of today 2/11/2025, 18.211.3 it is my this is the best choice for most.

18.211.4 - Causing reboots.

18.211.5 - Causing AnyConnect issues.

18.211.5.1 - Not hearing much, I have never needed to  move to a X.X.X.Y release 

Please feel free to chime in and correct me and or discuss moving recommendations.

Love to get all the help I can in making these moves so that we don't have to revert after running into new firmware issues.

May need to start a new post every couple months to keep this clean. Feel free to 

[RaphaelL]

From what I could test in my lab and on some site MX 19.1.X looks very solid so far. Not using AnyConnect but 90% of the MX features and so far so good. 

[Knowguy]

Way too scared to pull the trigger on that. I love that the intent was to use Version 19 to correct all of the Non-Meraki VPN issues.... have you tested any of that?

[RaphaelL]

Yes. The NMVPN issue that I had is fixed

[RWelch]

MX19.1.7.1 has been solid for my networks consisting of MX75s, MX95s and MX105s to include NMVPN scenarios.

I tend to test MX releases in non production networks to evaluate MX releases for how my networks are configured and to avoid production networks from experiencing outages or random reboots.

I currently have one production MX105 running MX18.211.4 at the moment which gives me this firmware status WARNING.

 
By clicking on the firmware status notice, you can see that my network will upgrade on 7/15/2025 if I don't manually upgrade prior to that date.  I tend to test firmware releases well before those update dates arrive in order to be able to decide if I want to upgrade to stable release MX18.211.5.1 or stable release candidate MX19.1.7.1.   Most all of my networks today are running MX19.1.7.1 without issues/problems.

[RaphaelL]

1 network warning , I wish I could ever see that in my org : 

😭

[jphamwd]

18.211.4 - for us was causing AnyConnect clients to randomly lose all outbound traffic both AutoVPN and internet bound traffic and the client itself stayed connected.

.2 or .3 also caused random reboots for us which support turned off multicore to fix that.  Yesterday we upgraded to 18.211.5.1 so not enough bake time to tell if it fixed the AnyConnect issues.