NAS-Port-ID Format C Enhancement

Table Of Contents

NAS-Port-ID Format C Enhancement

Contents

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

Additional References

Related Documents

Standards

MIBs

RFCs

Technical Assistance

Command Reference

nas-port-id format c

Feature Information for NAS-Port-ID Format C Enhancement

Glossary

NAS-Port-ID Format C Enhancement

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First Published: December 5, 2006

Last Updated: December 5, 2006

The 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 in This Module

Your Cisco IOS software release may not support all of the features documented in this module. To reach links to specific feature documentation in this module and to see a list of the releases in which each feature is supported, use the "Feature Information for NAS-Port-ID Format C Enhancement" section.

Finding Support Information for Platforms and Cisco IOS Software Images

Use Cisco Feature Navigator to find information about platform support and Cisco IOS software image support. Access Cisco Feature Navigator at http://www.cisco.com/go/fn. You must have an account on Cisco.com. If you do not have an account or have forgotten your username or password, click Cancel at the login dialog box and follow the instructions that appear.

Contents

•Restrictions for NAS-Port-ID Format C Enhancement

•Information About NAS-Port-ID Format C Enhancement

•How to Configure the NAS-Port-ID Format C Enhancement Feature

•Configuration Examples for NAS-Port-ID Format C Enhancement

•Additional References

•Command Reference

•Feature Information for NAS-Port-ID Format C Enhancement

•Glossary

Restrictions for NAS-Port-ID Format C Enhancement

This functionality is available only in Cisco IOS Release 12.2(31)SB2.

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:

•Coding Format for NAS-Port-ID Format C

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}

•For ATM, XPI is the virtual path identifier (VPI) and XCI is the virtual circuit identifier (VCI).

•For Ethernet, XPI is outer vlan-tag, XCI is inner vlan-tag.

•Requirements for XPI:XCI for Ethernet are as follows:

–For 802.1Q tunneling (QinQ), the format should be outer vlan-tag:inner vlan-tag. (Prior to Release 12.2(31)SB2, Cisco IOS software supports inner vlan-tag:outer vlan-tag).

–For single tag VLAN, XPI should be 4096.

•The Circuit-ID tag (if present) must be appended to this string when the nas-port-id format c command is used. The format for the Circuit-ID or Remote-ID tag is as follows:

AccessNodeIdentifier/ANI_rack/ANI_frame/ANI_slot/ANI_subslot/ANI_port[:ANI_XPI.ANI_XCI]

•The digital subscriber line access multiplexer (DSLAM) should append this information to the broadband remote access server (BRAS), and the BRAS transparently delivers it. If the Circuit-ID or Remote-ID tag is not present in DHCP option 82, a string of 0/0/0/0/0/0 should be appended to the NAS-Port-ID tag.

The following examples illustrate this format:

•NAS-Port-ID = atm 31/31/7:255.65535 guangzhou001/0/31/63/31/127

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 guangzhou001/0/31/63/31/127 is the Circuit-ID or Remote-ID tag.

•NAS-Port-ID = eth 31/31/7:1234.2345 0/0/0/0/0/0

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.

•NAS-Port-ID = eth 31/31/7:4096.2345 0/0/0/0/0/0

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:

•Configuring the NAS-Port-ID Format C Enhancement Feature

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

1. enable

2. configure terminal

3. bba-group pppoe group-name

4. virtual-template template-number

5. nas-port-id format c

DETAILED STEPS

	Command or Action	Purpose
Step 1	enable Example: Router> enable	Enables privileged EXEC mode. •Enter your password if prompted.
Step 2	configure terminal Example: Router# configure terminal	Enters global configuration mode.
Step 3	bba-group pppoe group-name Example: Router(config)# bba-group pppoe pppoe-group	Enters BBA group configuration mode and defines a PPPoE profile.
Step 4	virtual-template template-number Example: Router(config-bba-group)# virtual template 1	Configures a PPPoE profile with a virtual template to be used for cloning virtual access interfaces. •The template-number argument is an identifying number of the virtual template that will be used to clone virtual access interfaces.
Step 5	nas-port-id format c Example: Router(config-bba-group)# nas-port-id format c	Specifies a format for broadband subscriber access line identification coding. Note The designation of format c is specifically designed as follows: NAS_PORT_ID=atm 31/31/7:255.65535 guangzhou001/0/31/63/31/127

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:

•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

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-pppoeoe

 virtual-template 1

 nas-port-id format c

!

interface Loopback0

 ip address 10.7.7.100 255.255.255.255

!

interface Virtual-Template1

 ip unnumbered Loopback0

no peer default ip address

 ppp authentication chap

!

interface FastEthernet0/0

 description PPPoEoE

 pppoe enable group bba-pppoeoe

!

The following is a sample configuration for the client side:

bba-group pppoe bbag-pppoeoe

 virtual-template 1

!

interface Virtual-Template1

 ip unnumbered Loopback0

 ppp chap hostname xyz

 ppp chap password 0 lab

!

interface Loopback0

 ip address 10.7.7.1 255.255.255.255

!

interface FastEthernet1/1

 no ip address

 pppoe 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-pppoeoa

 virtual-template 2

 nas-port-id format c

!

interface Loopback1

 ip address 10.5.5.100 255.255.255.255

!

interface Virtual-Template2

 ip unnumbered Loopback1

no peer default ip address

 ppp authentication chap

!

interface ATM2/0.1 multipoint

 description PPPoEoA

 pvc 1/100

  encapsulation aal5snap

  protocol pppoe group bba-pppoeoa

 !

The following is a sample configuration for the client side:

bba-group pppoe bbag-pppoeoa

 virtual-template 2

!

interface Virtual-Template2

 ip unnumbered Loopback1

 ppp chap hostname abc

 ppp chap password 0 lab

!

interface Loopback1

 ip address 10.5.5.1 255.255.255.255

!

interface ATM6/0.1 multipoint

 pvc 1/100

 encapsulation aal5snap

 protocol pppoe group bbag-pppoeoa

 !

Additional References

The following sections provide references related to the NAS-Port-ID Format C Enhancement feature.

Related Documents

Related Topic	Document Title
Command reference documentation for commands used in this document	Cisco IOS Broadband and DSL Commands

Standards

Standard	Title
No new or modified standards are supported by this feature, and support for existing standards has not been modified by this feature.	—

MIBs

MIB	MIBs Link
No new or modified MIBs are supported by this feature, and support for existing MIBs has not been modified by this feature.	To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL: http://www.cisco.com/go/mibs

RFCs

RFC	Title
No new or modified RFCs are supported by this feature, and support for existing RFCs has not been modified by this feature.	—

Technical Assistance

Description	Link
The Cisco Technical Support & Documentation website contains thousands of pages of searchable technical content, including links to products, technologies, solutions, technical tips, and tools. Registered Cisco.com users can log in from this page to access even more content.	http://www.cisco.com/techsupport

Command Reference

This section documents the following new command.

•nas-port-id format c

nas-port-id format c

To specify a format for broadband subscriber access line identification coding that complies with a specific set of defined requirements, use the nas-port-id format c command in BBA group configuration mode. To disable this format implementation, use the no form of this command.

nas-port-id format c

no nas-port-id format c

Syntax Description

This command has no arguments or keywords.

Command Default

If this command is not configured, the default strings for NAS-Port-ID are used.

Command Modes

BBA group configuration

Command History

Release	Modification
12.2(31)SB2	This command was introduced.

Usage Guidelines

The nas-port-id format c command defines 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}

•For ATM, XPI is the virtual path identifier (VPI) and XCI is the virtual circuit identifier (VCI).

•For Ethernet, XPI is outer vlan-tag, XCI is inner vlan-tag.

•Requirements for XPI:XCI for Ethernet are as follows:

–For 802.1Q tunneling (QinQ), the format should be outer vlan-tag:inner vlan-tag. (Prior to Release 12.2(31)SB2, Cisco IOS software supports inner vlan-tag:outer vlan-tag).

–For single tag VLAN, XPI should be 4096.

•The Circuit-ID tag (if present) must be appended to this string when the nas-port-id format c command is used. The format for the Circuit-ID or Remote-ID tag is as follows:

AccessNodeIdentifier/ANI_rack/ANI_frame/ANI_slot/ANI_subslot/ANI_port[:ANI_XPI.ANI_XCI]

•The digital subscriber line access multiplexer (DSLAM) should append this information to the broadband remote access server (BRAS), and the BRAS transparently delivers it. If the Circuit-ID or Remote-ID tag is not present in DHCP option 82, a string of 0/0/0/0/0/0 should be appended to the NAS-Port-ID tag.

The following examples illustrate this format:

•NAS-Port-ID = atm 31/31/7:255.65535 guangzhou001/0/31/63/31/127

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 guangzhou001/0/31/63/31/127 is the Circuit-ID or Remote-ID tag.

•NAS-Port-ID = eth 31/31/7:1234.2345 0/0/0/0/0/0

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.

•NAS-Port-ID = eth 31/31/7:4096.2345 0/0/0/0/0/0

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.

Examples

The following example lists the commands for entering BBA group configuration mode and identifying a profile, configuring a virtual template, and specifying format c for the NAS-Port-ID tag:

bba-group pppoe bba-pppoeoe

 virtual-template 1

 nas-port-id format c

!

Related Commands

Command	Description
bba-group pppoe	Enters BBA group configuration mode and defines a PPPoE profile.
virtual-template	Configures a PPPoE profile with a virtual template to be used for cloning virtual access interfaces.

Feature Information for NAS-Port-ID Format C Enhancement

Table 1 lists the release history for this feature.

Not all commands may be available in your Cisco IOS software release. For release information about a specific command, see the command reference documentation.

Cisco IOS software images are specific to a Cisco IOS software release, a feature set, and a platform. Use Cisco Feature Navigator to find information about platform support and Cisco IOS software image support. Access Cisco Feature Navigator at http://www.cisco.com/go/fn. You must have an account on Cisco.com. If you do not have an account or have forgotten your username or password, click Cancel at the login dialog box and follow the instructions that appear.

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Note Table 1 lists only the Cisco IOS software release that introduced support for a given feature in a given Cisco IOS software release train. Unless noted otherwise, subsequent releases of that Cisco IOS software release train also support that feature.

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Table 1 Feature Information for the NAS-Port-ID Format C Enhancement Feature

Feature Name	Releases	Feature Information
NAS-Port-ID Format C Enhancement	12.2(31)SB2	The 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 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. In Cisco IOS Release 12.2(31)SB2, support is provided for the Cisco 10000 series platform.

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.

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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Note See Internetworking Terms and Acronyms for terms not included in this glossary.

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Any Internet Protocol (IP) addresses used in this document are not intended to be actual addresses. Any examples, command display output, and figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses in illustrative content is unintentional and coincidental.

© 2006 Cisco Systems, Inc. All rights reserved.