PPPoE - Session Limiting on Inner QinQ VLAN

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Updated:January 15, 2008

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PPPoE Session Limiting on Inner QinQ VLAN

Table Of Contents

PPPoE Session Limiting on Inner QinQ VLAN

Finding Feature Information

Contents

Prerequisites for PPPoE Session Limiting on Inner QinQ VLAN

Restrictions for PPPoE Session Limiting on Inner QinQ VLAN

Information About PPPoE Session Limiting on Inner QinQ VLAN

Benefits of PPPoE Session Limiting on Inner QinQ VLAN

Feature Design of PPPoE Session Limiting on Inner QinQ VLAN

How to Configure PPPoE Session Limiting on Inner QinQ VLAN

Configuring PPPoE Session Limiting on Inner QinQ VLAN

Examples

Troubleshooting Tips

Configuration Examples for PPPoE Session Limiting on Inner QinQ VLAN

PPPoE Session Limiting on Inner QinQ VLAN: Example

Additional References

Related Documents

Standards

MIBs

RFCs

Technical Assistance

Feature Information for PPPoE Session Limiting on Inner QinQ VLAN


PPPoE Session Limiting on Inner QinQ VLAN

First Published: December 4, 2006
Last Updated: October 2, 2009

The PPPoE Session Limiting on Inner QinQ VLAN feature allows a service provider to limit each customer to one PPP over Ethernet (PPPoE) client in use by providing the ability to limit the number of PPPoE over QinQ (IEEE 802.1Q VLAN tunnel) sessions based on the inner VLAN ID configured under a subinterface. This capability eliminates the need to configure large numbers of subinterfaces.

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 PPPoE Session Limiting on Inner QinQ VLAN" 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 PPPoE Session Limiting on Inner QinQ VLAN

•Restrictions for PPPoE Session Limiting on Inner QinQ VLAN

•Information About PPPoE Session Limiting on Inner QinQ VLAN

•How to Configure PPPoE Session Limiting on Inner QinQ VLAN

•Configuration Examples for PPPoE Session Limiting on Inner QinQ VLAN

•Additional References

•Feature Information for PPPoE Session Limiting on Inner QinQ VLAN

Prerequisites for PPPoE Session Limiting on Inner QinQ VLAN

•PPPoE server functionality must be configured.

•The PPPoE over IEEE 802.1Q VLANs feature must be configured.

Restrictions for PPPoE Session Limiting on Inner QinQ VLAN

•Do not configure the inner VLAN session limit to be greater than the outer session limit.

Information About PPPoE Session Limiting on Inner QinQ VLAN

To configure the PPPoE Session Limiting on Inner QinQ VLAN feature, you should understand the following concepts:

•Benefits of PPPoE Session Limiting on Inner QinQ VLAN

•Feature Design of PPPoE Session Limiting on Inner QinQ VLAN

Benefits of PPPoE Session Limiting on Inner QinQ VLAN

•Facilitates the ability to provision thousands of PPPoE over QinQ sessions having unique inner VLANs using simpler and easier to manage configurations.

•Allows service providers to limit PPPoE sessions based on the QinQ inner VLAN ID.

Feature Design of PPPoE Session Limiting on Inner QinQ VLAN

Prior to the PPPoE Session Limiting on Inner QinQ VLAN feature, PPPoE session limiting required a QinQ subinterface to be configured for each QinQ inner VLAN to be session limited, resulting in configuration requirements that did not scale to large numbers of QinQ VLAN ID pairs. The PPPoE Session Limiting on Inner QinQ VLAN feature adds broadband remote access server (BRAS) capability for configuring a single subinterface for all the unique inner VLAN IDs per outer VLAN while limiting one session per inner VLAN.

Figure 1 shows a typical implementation of the PPPoE Session Limiting on Inner QinQ VLAN feature.

Figure 1 PPPoE over QinQ Session Limiting

How to Configure PPPoE Session Limiting on Inner QinQ VLAN

This section contains the following procedure:

•Configuring PPPoE Session Limiting on Inner QinQ VLAN

Configuring PPPoE Session Limiting on Inner QinQ VLAN

Perform this task to configure PPPoE over QinQ session limiting, which allows you to limit the number of QinQ inner VLAN connections for each customer.

SUMMARY STEPS

1. enable

2. configure terminal

3. bba-group pppoe group-name

4. sessions per-vlan limit per-vlan-limit inner per-QinQ-inner-limit

5. end

6. show pppoe session

7. show pppoe summary

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 group 1

Creates a PPPoE profile.

Step 4 

sessions per-vlan limit per-vlan-limit inner per-QinQ-inner-limit

Example:

Router(config-bba-group)# sessions per-vlan limit 400 inner 65

Configures inner and outer VLAN limit.

Step 5 

end

Example:

Router(config-bba-group)# end

(Optional) Exits the current configuration mode.

Step 6 

show pppoe session

Example:

Router# show pppoe session

(Optional) Displays information about currently active PPPoE sessions.

Step 7 

show pppoe summary

Example:

Router# show pppoe summary

(Optional) Displays summary of the currently active PPPoE sessions.

Examples

The following is a sample output from the show pppoe session command: 

Router# show pppoe session


     1 session  in FORWARDED (FWDED) State

     1 session  total


Uniq ID

PPPoE 
SID

RemMAC

Port

VT

VA

State

LocMAC

VA-st

26

19

0001.96da.a2c0

Et0/0.1

5

N/A

RELFWD

000c.8670.1006

VLAN:3434

The following is a sample output from the show pppoe summary command: 

Router# show pppoe summary


PTA  : Locally terminated sessions

    FWDED: Forwarded sessions

    TRANS: All other sessions (in transient state)


                      TOTAL     PTA   FWDED   TRANS

TOTAL                 20434   20434       0       0

GigabitEthernet2/0/0   4096    4096       0       0

ATM3/0/0              16247   16247       0       0

Troubleshooting Tips

The following commands can help troubleshoot PPPoE session limiting:

•debug pppoe errors

•show pppoe session

•show pppoe summary

Configuration Examples for PPPoE Session Limiting on Inner QinQ VLAN

This section provides the following configuration example:

•PPPoE Session Limiting on Inner QinQ VLAN: Example

PPPoE Session Limiting on Inner QinQ VLAN: Example

The following example shows how to enable PPPoE over QinQ session limiting on Ethernet interface 3/1.1 with outer VLAN ID 10 and a unique inner VLAN ID for each session. 

bba-group pppoe group1	

 virtual-template 1

 sessions per-vlan limit 1000 inner 65

interface ethernet3/1.1

 encapsulation dot1q 10 second-dot1q any

 enable group group1

The following example shows how to configure the PPPoE Session Limiting on Inner QinQ VLAN feature on the Cisco 10000: 

bba-group pppoe PPPOE-LIMIT

 virtual-template 1

sessions per-mac limit 1000 inner 65

!

interface FastEthernet1/1.201

 description connected to Cat Switch

 encapsulation dot1Q 201

 pppoe enable group PPPOE-LIMIT

!

interface FastEthernet1/1.202

 description connected to Cat Switch

 encapsulation dot1Q 202

 pppoe enable group PPPOE-LIMIT

!

interface Virtual-Template1

 ip address negotiated

 no logging event link-status

 ppp chap hostname pppoeuser

 ppp chap password 0 cisco

!

end

The following example shows how to configure a Catalyst switch (see Figure 1) to transport PPPoE over inner QinQ: 

interface FastEthernet0/1

 description connected to UUT

 switchport trunk encapsulation dot1q

 switchport trunk allowed vlan 301

 switchport mode trunk

!

interface FastEthernet0/2

 description connected to Client

 switchport access vlan 301

switchport mode dot1q-tunnel

Additional References

The following sections provide references related to the PPPoE Session Limiting on Inner QinQ VLAN feature.

Related Documents

Related Topic
Document Title

Broadband access aggregation concepts

Cisco IOS Broadband and DSL Configuration Guide

Broadband access commands

Cisco IOS Broadband Access Aggregation and DSL Command Reference


Standards

Standard
Title

IEEE Standard 802.1Q

Virtual Bridged Local Area Networks


MIBs

MIB
MIBs Link

No new or modified MIBs are supported 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

RFC 2516

PPP over Ethernet


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/techsupport


Feature Information for PPPoE Session Limiting on Inner QinQ VLAN

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.

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 PPPoE Session Limiting on Inner QinQ VLAN 

Feature Name
Releases
Feature Information

PPPoE Session Limiting on Inner QinQ VLAN

12.2(31)SB2
12.2(33)SRC
15.0(1)M

The PPPoE Session Limiting on Inner QinQ VLAN feature provides the ability to limit the number of PPPoE over QinQ, (IEEE 802.1Q VLAN tunnel) sessions based on the inner VLAN ID configured under a subinterface. In Cisco IOS Release 12.2(31)SB2, this feature was introduced on the Cisco 10000.

This feature was integrated into Cisco IOS Release 12.2(33)SRC.

This feature was integrated into Cisco IOS Release 15.0(1)M.

The following commands were introduced or modified: debug pppoe, session per-vlan limit, show pppoe session.


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