I have one 7600 connected directly in the switch Force10 model E300 configured in this fashion:
switchport access vlan 46
switchport mode access
no ip address
Switch Force10 - E300
Name: GigabitEthernet 0/9
The problem is that message is logged in the 7600 router and the interface goes to blocking state.
Jul 5 18:15:06.686 UTC: %SPANTREE-SP-7-RECV_1Q_NON_TRUNK: Received 802.1Q BPDU on non trunk GigabitEthernet5/2 VLAN46.
Jul 5 18:15:06.686 UTC: %SPANTREE-SP-7-BLOCK_PORT_TYPE: Blocking GigabitEthernet5/2 on VLAN0046. Inconsistent port type.