Networking Software (IOS & NX-OS)

Table Of Contents

Upstream PPPoX Connection Speed Transfer at LAC

Finding Feature Information

Contents

Prerequisites for Upstream PPPoX Connection Speed Transfer at LAC

Restrictions for Upstream PPPoX Connection Speed Transfer at LAC

Information About Upstream PPPoX Connection Speed Transfer at LAC

Upstream PPPoX Connection Speed Transfer at LAC

Benefits of Upstream PPPoX Connection Speed Transfer at LAC

How to Configure Upstream Connection Speed Transfer at LAC

Configuring Upstream PPPoX Connection Speed Transfer at the LAC

Configuring Upstream PPPoX Connection Speed Transfer at LAC on a PVC

Configuring Upstream PPPoX Connection Speed Transfer at LAC on VC

Configuration Examples for Upstream PPPoX Connection Speed Transfer at LAC

Configuring Upstream PPPoX Connection Speed Transfer at LAC: Example

Additional References

Related Documents

Standards

MIBs

RFCs

Technical Assistance

Feature Information for Upstream PPPoX Connection Speed Transfer at LAC

Upstream PPPoX Connection Speed Transfer at LAC

---

First Published: May 2, 2005

Last Updated: November 20, 2009

The Upstream PPPoX Connection Speed Transfer at LAC feature allows the transfer of the upstream PPPoX session speed value at the Layer 2 Tunnel Protocol (L2TP) access concentrator (LAC). This transfer is accomplished by configuring the required speed on the ATM virtual circuit (VC) carrying the PPPoX session and then transferring this information into attribute-value (AV) pair 38 for transport from the LAC to the L2TP network server (LNS).

---

Note PPPoX is a term used to refer to PPPoE, PPPoA, and PPPoEoA. All are implementations of PPP over various delivery protocols such as Ethernet and ATM.

---

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 Upstream PPPoX Connection Speed Transfer at LAC" 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

•Prerequisites for Upstream PPPoX Connection Speed Transfer at LAC

•Restrictions for Upstream PPPoX Connection Speed Transfer at LAC

•Information About Upstream PPPoX Connection Speed Transfer at LAC

•How to Configure Upstream Connection Speed Transfer at LAC

•Configuration Examples for Upstream PPPoX Connection Speed Transfer at LAC

•Additional References

•Feature Information for Upstream PPPoX Connection Speed Transfer at LAC

Prerequisites for Upstream PPPoX Connection Speed Transfer at LAC

•You must understand the concepts described in the Preparing for Broadband Access Aggregation module.

•You must establish PPPoE sessions using the procedures in the Providing Protocol Support for Broadband Access Aggregation of PPPoE Sessions module.

Restrictions for Upstream PPPoX Connection Speed Transfer at LAC

The following restrictions apply to the Upstream PPPoX Connection Speed Transfer at LAC feature:

•For PPPoE, all sessions over the same VC must have the same send and receive speed.

•The upstream speed is informational and does not imply any policing or shaping of the session speed.

Information About Upstream PPPoX Connection Speed Transfer at LAC

To configure the Upstream PPPoX Connection Speed Transfer at LAC feature, you should understand the following concepts:

•Upstream PPPoX Connection Speed Transfer at LAC

•Benefits of Upstream PPPoX Connection Speed Transfer at LAC

Upstream PPPoX Connection Speed Transfer at LAC

The send speed from the LAC to the remote destination is copied into AV pair 38 so that the session is symmetric at the LNS. The LNS does not do any policing of the upstream rate but verifies the session speed against the Service Level Agreement (SLA) before accepting it.

The transfer of the upstream PPPoX session speed at the LAC is done by:

•Configuring the required speed on the ATM virtual circuit carrying the PPPoX session.

•Transferring the information to AV pair 38 for transport from the LAC to the LNS.

Figure 1 shows how the Upstream PPPoX Connection Speed Transfer at LAC feature works.

Figure 1 Upstream PPPoX Connection Speed Transfer at LAC

Benefits of Upstream PPPoX Connection Speed Transfer at LAC

The Upstream PPPoX Connection Speed Transfer at LAC feature enables the configuration of an upstream PPPoX session speed, which is different from the downstream speed and allows the transfer of the upstream speed value from the LAC to the LNS. The default state (before this feature is enabled) is that the upstream speed and the downstream speed are the same. This feature implements changes that allows asymmetry in the upstream and downstream speeds.

This feature provides the following benefits:

•Allows support for asymmetric broadband service speeds such as asymmetric digital subscriber line (ADSL).

•Complies with RFC 2661 for L2TP.

•Is required for regulatory compliance in certain European countries; for example, Germany.

How to Configure Upstream Connection Speed Transfer at LAC

This section contains the following procedures:

•Configuring Upstream PPPoX Connection Speed Transfer at the LAC (required)

•Configuration Examples for Upstream PPPoX Connection Speed Transfer at LAC (optional)

Configuring Upstream PPPoX Connection Speed Transfer at the LAC

The tasks in this section configure upstream PPPoX connection speed transfer at the LAC on a PVC or VC:

•Configuring Upstream PPPoX Connection Speed Transfer at LAC on a PVC (required)

•Configuring Upstream PPPoX Connection Speed Transfer at LAC on VC (required)

Configuring Upstream PPPoX Connection Speed Transfer at LAC on a PVC

Perform this task to configure the Upstream PPPoX Connection Speed Transfer feature at the LAC on a PVC.

SUMMARY STEPS

1. enable

2. configure terminal

3. interface atm slot/port.[subinterface-number {mpls | multipoint | point-to-point}]

4. range [range-name] pvc start-vpi/start-vci end-vpi/end-vci

5. rx-speed incoming-cell-rate

6. exit

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	interface atm slot/port.[subinterface-number {mpls | multipoint| point-to-point}] Example: Router(config)# interface atm 2/0.1 multipoint	Enters subinterface configuration mode.
Step 4	range [range-name] pvc start-vpi/start-vci end-vpi/end-vci Example: Router(config-subif)# range pvc 0/100 0/110	Enters PVC-in-range configuration mode.
Step 5	rx-speed incoming-cell-rate Example: Router(config-if-atm-range)# rx-speed 128	Allows L2TP to send AV pair 38 with the given value to LNS. •The valid range for incoming-cell-rate for L2TP AVP is from 0 to 44209 kb/s.
Step 6	exit Example: Router(config-if-atm-range)# exit	Exits PVC-in-range configuration mode.

Configuring Upstream PPPoX Connection Speed Transfer at LAC on VC

Perform this task to configure the Upstream PPPoX Connection Speed Transfer at LAC on a VC.

SUMMARY STEPS

1. enable

2. configure terminal

3. interface atm slot/port.[subinterface-number {mpls | multipoint | point-to-point}]

4. pvc [name] {vpi/vci | vci} [ces | ilmi | qsaal | smds | l2transport]

5. rx-speed incoming-cell-rate

6. encapsulation {aal2 | aal5auto | aal5autoppp virtual-template number [group group-name] | aal5ciscoppp virtual-template number | aal5mux protocol | aal5nlpid | aal5snap}

7. exit

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	interface atm slot/port.[subinterface-number{mpls | multipoint | point-to-point}] Example: Router(config)# interface atm 2/0.1 multipoint	Enters subinterface configuration mode.
Step 4	pvc [name] {vpi/vci | vci} [ces | ilmi | qsaal | smds | l2transport] Example: Router(config-subif)# pvc pvc1 0/100	Enters PVC-class configuration mode.
Step 5	rx-speed incoming-cell-rate Example: Router(config-if-atm-vc)# rx-speed 128	Allows L2TP to send (AV) pair 38 with the given value to LNS.
Step 6	encapsulation {aal2 | aal5auto | aal5autoppp virtual-template number [group group-name] | aal5ciscoppp virtual-template number | aal5mux protocol | aal5nlpid | aal5snap} Example: Router(config-if-atm-vc)# encapsulation aal5snap	Configures Logical Link Control (LLC) Subnetwork Access Protocol (SNAP) encapsulation on the PVC.
Step 7	exit Example: Router(config-if-atm-vc)# exit	Exits PVC-class configuration mode.

Configuration Examples for Upstream PPPoX Connection Speed Transfer at LAC

This section provides the following configuration example:

•Configuring Upstream PPPoX Connection Speed Transfer at LAC: Example

Configuring Upstream PPPoX Connection Speed Transfer at LAC: Example

The following examples show how to configure the upstream PPPoX connection speed transfer at LAC in PVC, range PVC, and PVC-in-range modes.

PVC Class

interface atm 6/0.110 multipoint

 pvc 0/600

 rx-speed 128

  encapsulation aal5snap

  exit

Range PVC

interface atm 6/0.110 multipoint

 range range-pppoa-1 pvc 100 4/199

  rx-speed 400

 exit

PVC-in-Range

interface atm 6/0.110 multipoint

  range range1 pvc 100 4/199

 pvc-in-range 0/300

 rx-speed 200

 shutdown

Additional References

The following sections provide references related to the upstream PPPoX connection speed transfer.

Related Documents

Related Topic	Document Title
Configuring VC classes	"Configuring VC Classes" section in the "Configuring ATM" module in the Cisco IOS Wide-Area Networking Configuration Guide.
Understanding the Unspecified Bit Rate+ (UBR+) service category for ATM VCs	"Understanding the UBR+ Service Category for ATM VCs" module in ATM (Asynchronous Transfer Mode) Technical Support
Broadband access aggregation concepts	Understanding Broadband Access Aggregation module
Preparing for broadband access aggregation task	Preparing for Broadband Access Aggregation module
BBDSL commands: complete command syntax, command mode, command history, defaults, usage guidelines, and examples	Cisco IOS Broadband Access Aggregation and DSL Command Reference
Cisco IOS commands	Cisco IOS Master Commands List, All Releases

Standards

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

MIBs

MIBs	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

RFCs	Title
RFC 2661	Layer 2 Tunneling Protocol "L2TP"

Technical Assistance

Description

Link

The Cisco Support website provides extensive online resources, including documentation and tools for troubleshooting and resolving technical issues with Cisco products and technologies. To receive security and technical information about your products, you can subscribe to various services, such as the Product Alert Tool (accessed from Field Notices), the Cisco Technical Services Newsletter, and Really Simple Syndication (RSS) Feeds. Access to most tools on the Cisco Support website requires a Cisco.com user ID and password.

http://www.cisco.com/cisco/web/support/index.html

Feature Information for Upstream PPPoX Connection Speed Transfer at LAC

Table 1 lists the release history for this feature.

For information on a feature in this technology that is not documented here, see the "Configuring Broadband Access Aggregation Features Roadmap."

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 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.

---

Table 1 Feature Information for Upstream PPPoX Connection Speed Transfer at LAC

Feature Name	Releases	Feature Information
Upstream PPPoX Connection Speed Transfer at LAC	12.2(15)B 12.2(4)T 12.2(33)SRE	The Upstream PPPoX Connection Speed Transfer at LAC feature allows the transfer of the upstream PPPoX session speed value at the LAC. The following sections provide information about this feature: •"Information About Upstream PPPoX Connection Speed Transfer at LAC" section •"How to Configure Upstream Connection Speed Transfer at LAC" section The following command was introduced: rx-speed.

Cisco and the Cisco Logo are trademarks of Cisco Systems, Inc. and/or its affiliates in the U.S. and other countries. A listing of Cisco's trademarks can be found at www.cisco.com/go/trademarks. Third party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership relationship between Cisco and any other company. (1005R)

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

© 2005-2009 Cisco Systems, Inc. All rights reserved.