I have an Extreme Alpine 3804 Core switch with a working and connected Cisco 2960G connected to a trunked port with 2 VLANS. This switch works. Added a 2 3750G (stacked) switch and basically mimicked the 2960G config and connected it to a identical trunked port on the Extreme Alpine and can ping from default vlan but not VLAN 40. I will attach the pertinent configs of each switch. In short I need the default and vlan 40 working from both Cisco switches through and to the Alpine Core switch. I even worked with TAC for 3 hours to no avail yet.