Cisco Systems 3825 manual Create an ATM PVC

Chapter 4 Configuring the Cisco 3825 Mobile Wireless Edge Router in a RAN-O Solution with the Command-Line

Configuration Sequence

Step 3 Create an ATM path on the UMTS Iub interface, enter the following command:

Router(config-if)# atm umts-iub

Step 4 Disable the Interim Local Management Interface (ILMI) keepalive parameters.

Router(config-if)#no atm ilmi-keepalive

Step 5 Create an ATM PVC:

Router(config-if)# pvc [name] vpi/vci [qsaal]

Where:

•name—(Optional) specifies the name of the ATM PVC interface you create.

•vpi—Specifies the ATM network virtual path identifier (VPI) of this PVC.

•vci—Specifies the ATM network virtual channel identifier (VCI) of this PVC.

•qsaal—(Optional) specifies theQ.2931 signaling ATM adaptation layer (QSAAL) encapsulation type.

Note Typically AAL5 PVCs are defined using qsaal encapsulation. However, if the traffic profile is such that the AAL5 packets exceed normal signaling (272 bytes) payload size, it is recommended that the PVC be defined using AAL0.

This is commonly true for OAM PVCs and synchronization PVCs. NodeB Application Part (NBAP) and Access Link Control Application Part (ALCAP) PVCs can be defined using qsaal encapsulation.

For example, the following command specifies the ATM PVC interface with a VPI of 2and a VCI of 1:

Router(config-if)# pvc 2/1

Note PVC definitions should match those on the NodeB and use the following definitions:

NBAP signaling–use qsaal

ALCAP signaling–use qsaal

AAL2 bearer–use encapsulation aal0

All other PVCs should use encapsulation aal0

Class of service should be defined to match the NodeB PVC class of service definitions. For instance, if the NodeB has defined a PVC with CBR, the PVC on the Cisco 3825 router should use the same CBR definitions.

OAM can be defined on the PVCs as well. If the NodeB has OAM enabled on its PVC, OAM should be defined on the PVCs of the Cisco 3825 router as well.

Step 6 Configure the ATM adaptation layer (AAL) and encapsulation type to AAL0 encapsulation.

Router(config-if)# encapsulation aal-encap

Where aal-encapspecifies the AAL and encapsulation type.

For example, the following command specifies the AAL as AAL0:

Router(config-if)# encapsulation aal0

	Cisco 3825 Mobile Wireless Edge Router Software Configuration Guide
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