A control PVC, also referred to as a control circuit, supports services such as ILMI to manage and control ATM networks. You must create a control PVC on an ATM major interface, and not on an ATM 1483 subinterface that is stacked above an ATM major interface.
To create a control PVC, you issue the pvc command from Interface Configuration mode. However, unlike the other tasks in this section, configuring a control PVC with the pvc command does not access ATM VC Configuration mode.
For example, the following commands create a control PVC with VCD 10, VPI 0, VCI 16, and ILMI encapsulation.
- host1(config)#interface atm 3/0
- host1(config-if)#pvc 10 0/16 ilmi
- host1(config-if)#
Regardless of whether you use the pvc command or the atm pvc command to create a control PVC, you cannot modify the VCD, VPI, or VCI values after they have been configured.
pvc
- host1(config-if)#pvc 5 0/5 ilmi