Assigning VC Classes to ATM Major Interfaces

To assign a previously configured VC class to an ATM major interface, you use the class-int command from Interface Configuration mode. Issuing this command applies the set of attributes in the specified VC class to the ATM data PVCs statically or dynamically created on this interface.

For example, the following commands assign the VC class named dsl-subscriber-class to an ATM major interface configured on slot 5, port 0.

For those attributes that you do not explicitly specify for an ATM PVC, the router applies the values specified in the VC class. As explained in Precedence Levels, the values in a VC class assigned to an ATM major interface have a lower precedence than both of the following:

• Values in a VC class assigned to an individual ATM PVC
• Values in a VC class assigned to an ATM 1483 subinterface

This means that if a VC class is assigned to an individual PVC or ATM 1483 subinterface configured on the major interface, the attribute values configured in the VC class assigned to the PVC or subinterface override the attribute values configured in the VC class assigned to the major interface.

For examples that illustrate how precedence levels affect the assignment of VC classes, see Precedence Level Examples for Assigning VC Classes.

class-int

• Use from Interface Configuration mode to assign a previously configured VC class to an ATM major interface.
• You must issue the exit command from Interface Configuration mode for the VC class association to take effect.
• Example

  host1(config-if)#class-int gold-subscriber-class

  host1(config-if)#exit

• Use the no version to remove the VC class association with the interface. Issuing the no version causes the router to set the PVC attributes to their systemwide default values, or to the values set in the associated VC class with the next highest order of precedence.
• See class-int.

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