How to use docker swarm to form cluster with 3 physical machines

Question

I created a swarm on one machine, but when I run the command:

docker swarm join --token SWMTKN-1-1dqzgu6oe9u6jp9kjrlsggyia65qxq44zccwpocwk6hs5i9n6c-a6kt16o70bqsjnaujxp4watyy 192.168.99.100:2377"

to other machines, I get this error:

Error response from daemon: rpc error: code = Unavailable desc = all SubConns are in TransientFailure, latest connection error:connection error:desc = "transport: Error while dialing dial tcp 192:168:99:100:2377: connect: connection refused".

Anyone could help to solve this?

Here is a screenshot of the error I'm getting

，无法从表中抓取某些元素（列表项）