OS X 10.9.4 fixes a long-standing bug in Mavericks related to wi-fi connections coming out of sleep.http://support.apple.com/kb/HT6281?viewlocale=en_US&locale=en_USAlso if the Mac have many AP in their list try to drag your AP higher as this can caus...

Yes this is for site to site VPN

Yes this is for the Mikrotik side. Meraki only gives you few options that you need the other side to adhere to.

Thanks I always assumed AutoVPN (used by Meraki for pushing site-to site VPNs) used L2TP.