Setup guide

3-21
Cisco 6400 Software Setup Guide
OL-1183-04
Chapter3 Basic NRP Configuration
Permanent Virtual Circuits
The following sections describe common methods of configuring PVCs:
• Configuring PVCs on the ATM Interface, page 3-21
• Configuring PVCs on ATM Subinterfaces, page 3-22
• Configuring VC Classes, page 3-24
• Configuring PVC Discovery, page 3-26
• Configuring PVC Traffic Shaping, page 3-28
For more general information on configuring PVCs, refer to the “Configuring ATM” chapter in the
CiscoIOS Wide-Area Networking Configuration Guide associated with your software release version.
Note Any PVC configured on the NRP must also be configured for the corresponding ATM interface on the
NSP. See the “Internal Cross-Connections” section on page2-10.
Configuring PVCs on the ATM Interface
To configure a PVC on the ATM interface, complete the following steps beginning in global
configuration mode:
Example—PVC with AAL5 SNAP Encapsulation on an ATM Interface
The following example shows a typical PVC configuration using the ATM adaptation layer 5 (AAL5)
Subnetwork Access Protocol (SNAP) encapsulation. AAL5 SNAP is commonly used in IP routing and
bridging. For information on IP routing and bridging, see the“RFC1483 Bridging Baseline
Architecture”tech notes on Cisco.com.
!
interface atm 0/0/0
pvc 0/40
encapsulation aal5snap
!
Command Description
Step1
Router(config)# interface atm 0/0/0
Specifies the NRP ATM interface and enters interface
configuration mode.
Step2
Router(config-if)# pvc [name] vpi/vci
Configures a new ATM PVC by assigning a name
(optional) and VPI/VCI values. Enters ATM VC
configuration mode.
Step3
Router(config-if-atm-vc)# encapsulation
{aal5snap | aal5nlpid}
or
Router(config-if-atm-vc)# encapsulation
{aal5mux ppp | aal5autoppp | aal5ciscoppp}
virtual-template number
Configures the ATM adaptation layer (AAL) and
encapsulation type for a PVC. May configure a PVC to
use a virtual template
1
as the default PPP interface
configuration.
1. A virtual template assigns PPP features (such as authentication and IP address assignment method) to a PVC. Virtual templates are used when
configuring PPP over ATM (PPPoA), PPP over Ethernet (PPPoE), and Layer 2 Tunneling Protocol (L2TP).