Hi @Mabouzid , You can check if it is compatible using this guide.    https://documentation.meraki.com/General_Administration/Cross-Platform_Content/Small-Form_Factor_Pluggable_(SFP)_and_Stacking_Accessories   Most of the time the issue is fibre strand need to be swaped or the Wavelength does match on either side. See below guide.   https://documentation.meraki.com/General_Administration/Tools_and_Troubleshooting/Basic_SFP_troubleshooting_guide       ... View more

unfortunitly i am not able to reach the other vendor support as the client bought the devices out side the country  ... View more

That version is a CS upgrade from the Meraki dashboard.  I'd try that first.  If it doesn't work then you could try the IOS-XE version, but that isn't fully stable yet. ... View more

thanks ... View more

any update  ... View more

It is common good practice to have two switches per stack connected, if the upstream device is an MX, only one will transmit at once, but it does provide failover. ... View more

any update ... View more

@rhbirkelund for stable and stable release candidate you are correct, but the beta is IOS-XE with Meraki management built into the base code, so we will be heading back to IOS-XE versions soon... 😉 ... View more