Problem with Link Aggregation in C9300s

[JosueRuiz]

I have a physical stack of two C9300 switches. I want to configure Link Aggregation of ports from both switches to another upstream switch, but when I try to configure it, it doesn't allow me to aggregate two interfaces from different switches in my stack. My question is, is this Link Aggregation capability possible on ports in different slots or members of a physical stack?

[alemabrahao]

Definitely yes. I believe you're using the correct physical stack?

I've always done it this way and never had a problem. What error message are you getting?

[JosueRuiz]

No error appears, but when simply selecting the desired ports for the different members, the "Aggregate" option in the Switch ports section is still blocked.

[alemabrahao]

I read in some group that Meraki managed Catalyst C9300 switches do not support cross-stack LAG, but I have not found a document that states this.

[ww · Accepted solution]

Works fine here.(in a stack of 2)

Check if the ports have the same config before aggregating

[JosueRuiz]

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.