All my site to site VPN users are able to establish the tunnel and pass phase 1 and 2. They are unable to access the servers/workstations on our network. Our PPTP VPN users are working as normal. All connections were working fine until we replaced a core switch in our main location. We are running the same build on this switch as the one we replaced. I feel this is a security issue on the switch, but unable to pinpoint. Any help is appreciated.