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Table Of Contents
NAS-Port-ID Format C Enhancement
Prerequisites for NAS-Port-ID Format C Enhancement
Restrictions for NAS-Port-ID Format C Enhancement
Information About NAS-Port-ID Format C Enhancement
Coding Format for NAS-Port-ID Format C
How to Configure the NAS-Port-ID Format C Enhancement Feature
Configuring the NAS-Port-ID Format C Enhancement Feature
Configuration Examples for NAS-Port-ID Format C Enhancement
Configuring PPPoE over Ethernet for the Access Concentrator Side and Client Side: Example
Configuring PPPoE over ATM/AAL5 SNAP for the Access Concentrator Side and Client Side: Example
Feature Information for NAS-Port-ID Format C Enhancement
NAS-Port-ID Format C Enhancement
First Published: December 5, 2006Last Updated: October 2, 2009The NAS-Port-ID Format C Enhancement feature introduces the nas-port-id format c command for Broadband Access Group (BBA group) configuration. This command defines a specific broadband subscriber access line identification (NAS-Port-ID) coding format. When this command is configured, the original value of the NAS-Port-ID tag is overwritten. If no valid string is available for the Remote-ID or the Circuit-ID tag as part of Dynamic Host Configuration Protocol (DHCP) option 82, a default string of 0/0/0/0/0/0 is appended to the NAS-Port-ID tag.
Finding Feature Information
Your software release may not support all the features documented in this module. For the latest feature information and caveats, see the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the "Feature Information for NAS-Port-ID Format C Enhancement" section.
Use Cisco Feature Navigator to find information about platform support and Cisco IOS and Catalyst OS software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.
Contents
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Prerequisites for NAS-Port-ID Format C Enhancement
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Prerequisites for NAS-Port-ID Format C Enhancement
The NAS-Port-ID tag is created.
Restrictions for NAS-Port-ID Format C Enhancement
The NAS-Port-ID Format C Enhancement feature is supported on the Cisco 10000 series platform where PPP over Ethernet (PPPoE) server functionality is supported.
This feature is not supported on PPP over ATM.
Information About NAS-Port-ID Format C Enhancement
To configure and apply this feature, you should understand the following concept:
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Coding Format for NAS-Port-ID Format C
The NAS-Port-ID Format C Enhancement feature provides the following broadband subscriber access line identification (NAS-Port-ID) coding format:
{atm/eth/trunk} NAS_slot/NAS_subslot/NAS_port:XPI:XCI {Circuit-ID/Remote-ID/default string}
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AccessNodeIdentifier/ANI_rack/ANI_frame/ANI_slot/ANI_subslot/ANI_port[:ANI_XPI.ANI_XCI]
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The following examples illustrate this format:
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In this example, the subscriber interface type of the BRAS equipment is an ATM interface, the BRAS slot number is 31, the BRAS subslot number is 31, the BRAS port number is 7, the VPI is 255, and the VCI is 65535. The string name001/0/31/63/31/127 is the Circuit-ID or Remote-ID tag.
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In this example, the subscriber interface type of the BRAS equipment is an Ethernet interface, the BRAS slot number is 31, the BRAS subslot number is 31, the BRAS port number is 7, the outer vlan-tag is 1234, and the inner vlan-tag is 2345. The string 0/0/0/0/0/0 is the default.
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In this example, the subscriber interface type of the BRAS equipment is an Ethernet interface, the BRAS slot number is 31, the BRAS subslot number is 31, the BRAS port number is 7, and the VLAN ID is 2345. The string 0/0/0/0/0/0 is the default.
How to Configure the NAS-Port-ID Format C Enhancement Feature
This section contains the following procedure:
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Configuring the NAS-Port-ID Format C Enhancement Feature
To overwrite the original value of the NAS-Port-ID tag and define the specific broadband subscriber access line identification (NAS-Port-ID) coding format that complies with that described in the "Coding Format for NAS-Port-ID Format C" section, perform the following task.
SUMMARY STEPS
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DETAILED STEPS
Configuration Examples for NAS-Port-ID Format C Enhancement
To enable the NAS-Port-ID Format C Enhancement feature, you must configure the access concentrator side and the client side in your network. This section provides the following sample configurations:
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Configuring PPPoE over Ethernet for the Access Concentrator Side and Client Side: Example
The following is a sample configuration for the access concentrator side of a PPPoE over Ethernet configuration:
bba-group pppoe bba-pppoeoevirtual-template 1nas-port-id format c!interface Loopback0ip address 209.165.200.234 255.255.255.224!interface Virtual-Template1ip unnumbered Loopback0no peer default ip addressppp authentication chap!interface FastEthernet0/0description PPPoEoEpppoe enable group bba-pppoeoe!The following is a sample configuration for the client side:
bba-group pppoe bbag-pppoeoevirtual-template 1!interface Virtual-Template1ip unnumbered Loopback0ppp chap hostname xyzppp chap password 0 lab!interface Loopback0ip address 209.165.200.243 255.255.255.224!interface FastEthernet1/1no ip addresspppoe enable group bbag-pppoeoe!Configuring PPPoE over ATM/AAL5 SNAP for the Access Concentrator Side and Client Side: Example
The following is a sample configuration for the access concentrator side of a PPPoE over an ATM/AAL5 Subnetwork Access Protocol (SNAP) configuration:
bba-group pppoe bba-pppoeoavirtual-template 2nas-port-id format c!interface Loopback1ip address 209.165.200.245 255.255.255.224!interface Virtual-Template2ip unnumbered Loopback1no peer default ip addressppp authentication chap!interface ATM2/0.1 multipointdescription PPPoEoApvc 1/100encapsulation aal5snapprotocol pppoe group bba-pppoeoa!The following is a sample configuration for the client side:
bba-group pppoe bbag-pppoeoavirtual-template 2!interface Virtual-Template2ip unnumbered Loopback1ppp chap hostname abcppp chap password 0 lab!interface Loopback1ip address 209.165.200.247 255.255.255.224!interface ATM6/0.1 multipointpvc 1/100encapsulation aal5snapprotocol pppoe group bbag-pppoeoa!Additional References
The following sections provide references related to the NAS-Port-ID Format C Enhancement feature.
Related Documents
Command reference documentation for commands used in this document
Cisco IOS Broadband Access Aggregation and DSL Command Reference
Standards
No new or modified standards are supported by this feature, and support for existing standards has not been modified by this feature.
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MIBs
RFCs
No new or modified RFCs are supported by this feature, and support for existing RFCs has not been modified by this feature.
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Technical Assistance
Feature Information for NAS-Port-ID Format C Enhancement
Table 1 lists the features in this module and provides links to specific configuration information.
Not all commands may be available in your Cisco IOS software release. For release information about a specific command, see the command reference documentation.
Use Cisco Feature Navigator to find information about platform support and software image support. Cisco Feature Navigator enables you to determine which Cisco IOS and Catalyst OS software images support a specific software release, feature set, or platform. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn. An account on Cisco.com is not required.
Note
Glossary
AAA—authentication, authorization, and accounting.
ATM—Asynchronous Transfer Mode.
BRAS—broadband remote access server.
CLI—command-line interface.
DHCP—Dynamic Host Configuration Protocol.
DSLAM—digital subscriber line access multiplexer.
HA—high availability.
NAS—network access server.
PPP—Point-to-Point Protocol
PPPoA—Point-to-Point Protocol over ATM.
PPPoE—Point-to-Point Protocol over Ethernet.
QinQ—IEEE 802.1Q tunneling.
RADIUS—Remote Authentication Dial-In User Service (RFC 2865).
SNAP—Subnetwork Access Protocol.
VCI—virtual circuit identifier.
VLAN—virtual local-area network.
VPI—virtual path identifier.
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