So since these are EOL'd and you cant get official support anymore, I need some help.
Simply put, we have three UC560's all connected via the 'built-in' site to site config. All tunnels show up and healthy. When they dial, the phones ring but they can't hear each other.
No firewalls in the mix whatsoever. Three UC560's connected directly to the internet (comcast) with static IP's. I hate to always blame Comcast for these types of things but do I really have another option? What else could it be?
A little background.... Comcast replaced our older SMC modem with the newer Cisco Gateway a couple months back. Triple checked that the new Cisco had all firewall settings off.