Configuring Individual ATM PVC Parameters

As an alternative to using the atm pvc command to configure ATM PVC parameters with a single command, you can access ATM VC Configuration mode to configure individual ATM PVC parameters with separate commands, one parameter at a time. You can configure parameters for the service category, encapsulation method, F5 OAM options, and Inverse ARP.

The following sections explain the benefits of using ATM VC Configuration mode and describes how to configure the ATM VC mode:

Benefits

Using commands in ATM VC Configuration mode to configure individual ATM PVC parameters provides the following benefits:

Creating Control PVCs

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

Creating Data PVCs

A data PVC, also referred to as a data circuit, is an ATM PVC that carries data. You must create a data PVC on an ATM 1483 subinterface that is stacked above an ATM major interface, and not on the ATM major interface itself.

To create a data PVC, you issue the pvc command from Subinterface Configuration mode to access ATM VC Configuration mode. From ATM VC Configuration mode, you can then do either of the following:

For example, the following commands create a data PVC with VCD 32, VPI 0, VCI 100 and default values for the other attributes. Issuing the exit command causes the configuration to take effect.

host1(config)#interface atm 3/2.2 host1(config-subif)#pvc 32 0/100 host1(config-subif-atm-vc)#exit host1(config-subif)#

Regardless of whether you use the pvc command or the atm pvc command to create a data PVC, you cannot modify the VCD, VPI, or VCI values after they have been configured.

pvc

Configuring the Service Category for Data PVCs

You can use individual commands in ATM VC Configuration mode to configure each supported service category on a data PVC, or to restore the default service category, unspecified bit rate (UBR) without a peak cell rate (PCR).

For example, the following commands configure a data PVC that uses the constant bit rate (CBR) service category with a nondefault PCR (10,000 Kbps). Issuing the exit command causes the configuration to take effect.

host1(config)#interface atm 3/0.3 host1(config-subif)#pvc 6 0/100 host1(config-subif-atm-vc)#cbr 10000 host1(config-subif-atm-vc)#exit host1(config-subif)#

cbr

ubr

vbr-nrt

vbr-rt

Configuring Encapsulation for Data PVCs

The encapsulation method on a data PVC represents the format of the data units that traverse the circuit. You can use the encapsulation command in ATM VC Configuration mode to configure the encapsulation method for a data PVC, or to restore the default encapsulation method, aal5snap.

For example, the following commands configure a data PVC that uses aal5all encapsulation. Issuing the exit command causes the configuration to take effect.

host1(config)#interface atm 3/0.3 host1(config-subif)#pvc 6 0/250 host1(config-subif-atm-vc)#encapsulation aal5all host1(config-subif-atm-vc)#exit host1(config-subif)#

encapsulation

Configuring F5 OAM for Data PVCs

In ATM VC Configuration mode, you can use the individual commands listed in Table 7 to configure nondefault values for F5 OAM services.

Table 7: F5 OAM Configuration Tasks and Associated Commands

To Configure

Use This Command

Surveillance parameters for alarm indication signal (AIS) and remote defect indication (RDI) fault management cells

oam ais-rdi

Continuity check (CC) verification

oam cc

Generation of F5 loopback cells and enabling of VC integrity

oam-pvc

Parameters for VC integrity

oam retry

For more information about OAM parameters, see Operations, Administration, and Management of ATM Interfaces .

Note: The oam-ais rdi command and the oam retry command are available only in ATM VC Configuration mode. There is no equivalent atm pvc command to configure these F5 OAM alarm surveillance and VC integrity parameters.

For example, the following commands enable VC integrity on a data PVC with a nondefault loopback frequency (30 seconds). Issuing the exit command causes the configuration to take effect.

host1(config)#interface atm 3/0.0 host1(config-subif)#pvc 32 0/32 host1(config-subif-atm-vc)#oam-pvc manage 30 host1(config-subif-atm-vc)#exit host1(config-subif)#

The following commands, which are available only in ATM VC Configuration mode, configure nondefault VC integrity and alarm surveillance parameters on a data PVC. In this example, the VC integrity parameters configured with the oam retry command include the up retry count (4), down retry count (6), and retry frequency (2). The alarm surveillance parameters configured with the oam ais-rdi command include the alarm down count (2) and alarm clear timeout duration (4 seconds). Issuing the exit command causes the configuration to take effect.

host1(config)#interface atm 3/0.0 host1(config-subif)#pvc 32 0/32 host1(config-subif-atm-vc)#oam retry 4 6 2 host1(config-subif-atm-vc)#oam ais-rdi 2 4 host1(config-subif-atm-vc)#exit host1(config-subif)#

oam ais-rdi

oam cc

oam-pvc

oam retry

Configuring Inverse ARP for Data PVCs

You can use the inarp command in ATM VC Configuration mode to enable Inverse ARP (InARP) on a data PVC that resides on an ATM 1483 NBMA subinterface configured with the multipoint option. The PVC must use the default encapsulation method, aal5snap. For more information about InARP, see Configuring an NBMA Interface.

For example, the following commands enable InARP with a nondefault refresh rate (10 minutes) on a data PVC. The PVC uses aal5snap encapsulation by default. Issuing the exit command causes the configuration to take effect.

host1(config)#interface atm 3/2.1 multipoint host1(config-subif)#pvc 6 0/11 host1(config-subif-atm-vc)#inarp 10 host1(config-subif-atm-vc)#exit host1(config-subif)#

inarp