offline switch

[nw-netadmin]

I have a C9300-24T that I monitor in the Meraki dashboard. I've had it for about a year now and it does great. It's just monitoring, not management, which is all that I need.

Every couple of months, I get a notice that it is offline when it isn't. If it was, my network would be down. So, obviously it just isn't checking in with meraki. The notice usually goes away within a couple of minutes. However, today it has been offline (in the dashboard) for several hours.

How is the best way to troubleshoot this? Is there a specific port or application that it uses? Is there a command on the switch that I can use to refresh the connection? It's not an emergency, but it's always good to keep the dashboard green.

Thanks

[alemabrahao]

What version are you running? Older versions rely on a container for Meraki monitoring. Newer versions (17.15.x and above) have native support.

[GIdenJoe]

If you only do monitoring you are NOT relying on the container architecture.
You can easily check this that you could already monitor C9200's for a long time and they do not support container architecture.

[nw-netadmin]

IOS XE 17.9.5

[alemabrahao]

This version is old, I suggest you  upgrade to version 17.15.3 which is recommended by Cisco.

[GIdenJoe]

The old cloud monitoring solution uses TCP/443 and must not be decrypted by an upstream firewall.

So if your tunnel is dropping now and then I can be related to an upstream issue.
Maybe if you check the logging does it provide any logs about failed TLS tunnels to dashboard.

Also do mind that cloud monitoring is going away soon: 31/01/2026.
So if you want to continue to use similar functionality you will need to offboard your switch from the cloud monitoring.  Then upgrade it to atleast 17.15.3 and then establish a new tunnel to Meraki and onboard it in dashboard with the "device configuration source".