I have a Cisco UC5xx device which is an all-in-one box that does switching, firewall and VOIP.
My device has 8 switchports built in. This box comes default with vlan 1 (data-192.168.10.x) and vlan 100 (voice-10.1.1.x).
There is a host on a separate (not part of UC5xx) network that the users behind this network needs access to. I created a vlan 200 and assigned an ip of 10.0.0.254. I then assigned a port to access vlan of 200. I plugged this port to the separate network and my UC5xx can now ping that outside host (10.0.0.15).
The problem I'm having is with the hosts behind the UC5xx on the data vlan pinging this outside host on vlan 200.