Hi Tellis002   I used to work with multiple layer-2 networks so I'm always thinking STP should work fine... Could you please update in this thread when you get a feedback from Meraki? I'm also very curious about what will cause this kind of issue. Thanks a lot. ... View more

Hello Ruan   Thanks a lot for your reply~ And yes, if primary MX is down Server 1 will be unreachable. Actually that's an expected situation. If we use two switches, and if one switch is down, the server under that switch will also become unreachable. So in fact, both servers are also HA build for one service. Now I got what should I do. Many thanks again for your kindly help. ... View more