It sounds like the interface is configured to be part of all VLANs. You can specify the VLANs that the interface participates in, which should make it like the other interface. # switchport mode trunk # switchporttrunk allowed vlan 1,2,3,4 You can view the running config by issuing the command #show run, then compare the two configurations with one another.    
[IMAGE] Just curious how the one on the right was created. Trunking VLANs specific to what ever is specified. The one on the left, every time a new VLAN is created it automatically enables it in there and must be removed. Same switch PowerConnect 5524.  
PowerConnect switcport trunking