@DarrenOC explained the other issue.  The way CS firmware works is that there is a traditional IOS-XE firmware underneath, with the Meraki management code running in a container on the 'master' switch.  When one goes down it has to fail this over to another switch and I believe this effectively means starting a new container on the other switch, or at least a sleeping container waiting for a timeout before waking up. ... View more

The problem, as you mentioned, was that I had different port configurations. After having the same configuration, I was able to enable the Link Aggregation option for the desired interfaces. Thank you. ... View more

https://documentation.meraki.com/General_Administration/Cross-Platform_Content/Small-Form_Factor_Pluggable_(SFP)_and_Stacking_Accessories   https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9300/software/release/16-11/release_notes/ol-16-11-9300.html ... View more

Thanks for the help. This has resolved my concerns. ... View more