# Preconfig Trunk

## Navigation

Port > Configure > Preconfig Trunk

The following information appears:

> Management Domain (vlanTrunkPortManagementDomain)

> Encapsulation Type (vlanTrunkPortEncapsulationType)

> Encapsulation Operating Type (vlanTrunkPortEncapsulationOperType)

> In Joins (vlanTrunkPortInJoins)

> Out Joins (vlanTrunkPortOutJoins)

> Old Advertisements (vlanTrunkPortOldAdverts)

> Port Dynamic State (vlanTrunkPortDynamicState)

> Port Dynamic Status (vlanTrunkPortDynamicStatus)

### Management Domain (vlanTrunkPortManagementDomain)

managementDomainIndex value for the management domain on this trunk port.

Note: Devices which support only one management domain will support this object as a read-only object.

### Encapsulation Type (vlanTrunkPortEncapsulationType)

Desired VLAN encapsulation type for this trunk port.

The value of this object cannot be set to negotiate if the port does not support negotiation or if its vlanTrunkPortDynamicState is set to either on or onNoNegotiate. Whether writing to this object in order to modify the encapsulation is supported is both device and interface-specific.

There are three possible values:

> isl

> dot1Q

> negotiate

### Encapsulation Operating Type (vlanTrunkPortEncapsulationOperType)

VLAN encapsulation type currently configured on this trunk port.

There are six possible values:

> isl

> dot10

> lane

> dot1Q

> negotiating

> notApplicable

Note: For interfaces whose vlanTrunkPortDynamicStatus is set to notTrunking, the vlanTrunkPortEncapsulationOperType will be notApplicable.

### In Joins (vlanTrunkPortInJoins)

Number of VTP Join messages received on this trunk port.

### Out Joins (vlanTrunkPortOutJoins)

Number of VTP Join messages sent from this trunk port.

### Old Advertisements (vlanTrunkPortOldAdverts)

Number of VTP Advertisement messages received on this trunk port which indicated that the sender does not support VLAN pruning.

### Port Dynamic State (vlanTrunkPortDynamicState)

Indicates how a device will handle the dynamic determination of whether an interface connecting two switches should be a trunk.

There are five possible values:

> on: The interface will always be a trunk.

> off: The interface will never be a trunk, regardless of any dynamic mechanisms to the contrary.

> desirable: It is desirable for the interface to become a trunk.

> auto: The interface is capable of becoming a trunk but will not initiate trunking negotiations.

> onNoNegotiate: The interface is permanently set to be a trunk and no negotiation will take place with the link's far end to ensure consistent operation. If the port does not support negotiation or its vlanTrunkPortEncapsulationType is set to negotiate, you cannot select this value.

Note: Devices that do not support dynamic determination only support the values on and off.

### Port Dynamic Status (vlanTrunkPortDynamicStatus)

Indicates whether the specified interface is acting as a trunk.