I am attempting to “Sandbox” 3 750 routers together to test VPN connection prior to deployment, I have them running through a switch i can’t seem to get them to talk to each other. i can ping the switch a Mikrotik 250 from the 3 750’s but cant get the the vpns to work. Hope you guys can help. i want to make sure these all connect properly before i deploy to remote sites.. thank in advance 
Hard to comment without more specific configuration information to look at. Try uploading config info from /export compact.
Pretty simple config… I have 3 Mikrotik 750’s one is going to be at the main office with the other 2 at remote sites. simple site to site VPN’s via IPSEC. I have set this type of VPN’s up before but never on my bench with out internet access. what i am trying to do i simply get these boxes to talk through a switch or router. My thinking was if i put them though a switch that they would connect up so i can verify that the VPN work so when i deploy them it will be a plug and play as i will have 2 other techs on the road and i want to minimize down time.
You can certainly run IPSEC with the devices all on the same subnet but it is hard to say what might be wrong without some config info and some more detailed symptoms.