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RADIUS Attribute 82 Tunnel Assignment ID

Last Updated: June 02, 2011

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 Table at the end of this document.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.

Restrictions for Radius Attribute 82 Tunnel Assignment ID

This feature is designed only for VPDN dial-in applications. It does not support VPDN dial-out.

Information about RADIUS Attribute 82 Tunnel Assignment ID

The RADIUS Attribute 82: Tunnel Assignment ID feature allows the Layer 2 Transport Protocol access concentrator (LAC) to group users from different per-user or domain RADIUS profiles into the same active tunnel. The RADIUS Attribute 82: Tunnel Assignment ID feature defines a new avpair, Tunnel-Assignment-ID, which allows the LAC to group users from different RADIUS profiles into the same tunnel if the chosen endpoint, tunnel type, and Tunnel-Assignment-ID are identical. This feature introduces new software functionality. No new commands are introduced with this feature.

Benefits

The RADIUS Attribute 82: Tunnel Assignment ID feature improves LAC and L2TP network server (LNS) performance by reducing memory usage, because fewer tunnel data structures must be maintained. This feature allows the LAC and LNS to handle a higher volume of users without negatively impacting router performance.

How to Configure RADIUS Attribute 82 Tunnel Assignment ID

There are not any specific configuration tasks associated with support of this feature.

Verifying RADIUS Attribute 82

To verify that RADIUS attribute 82 is being used by the LAC during tunnel authorization, use the following privileged EXEC command:

Command

Purpose

 
Router# debug radius

Displays information associated with RADIUS. The output of this command shows whether attribute 82 is being sent in access requests.

Configuration Examples for RADIUS Attribute 82 Tunnel Assignment ID

LAC Configuration Example

The following example shows a sample LAC configuration when the VPDN group is defined on the router:

aaa new-model 
aaa authentication ppp default local 
aaa authorization network default local 
! 
bba-group pppoe bba_group1 
virtual-template 1 
! 
interface Loopback1 
no ip address 
vpdn-group VPDN_LAC1 
request-dialin 
protocol l2tp 
local name tb162_LAC1 
domain isp1.com 
initiate-to ip 10.0.0.2 
source-ip 10.0.0.1 
l2tp tunnel receive-window 100 
l2tp tunnel nosession-timeout 30 
l2tp tunnel retransmit retries 5 
l2tp tunnel retransmit timeout min 2 
l2tp tunnel retransmit timeout max 8 
l2tp tunnel hello 60 
l2tp tunnel password tunnel1 
! 
! 
interface virtual-template 1 
no snmp trap link-status 
no keepalive 
ip unnumbered loopback1 
ppp mtu adaptive 
ppp authentication pap 
no logging event link-status 
!

The following example shows a sample LAC configuration when the VPDN group is defined in RADIUS:

aaa authentication ppp default group radius 
aaa authorization network default radius 
!
bba-group pppoe bba_group1 
virtual-template 1 
! 
interface Loopback1 
no ip address 
interface virtual-template 1 
no snmp trap link-status 
no keepalive 
ip unnumbered loopback1 
ppp mtu adaptive 
ppp authentication pap 
no logging event link-status

LNS Configuration Example

The following example configures VPDN on the LNS:

hostname lns
aaa new-model
aaa authentication ppp default group radius
aaa authorization network default group radius
vpdn enable
vpdn-group VPDN_LNS1
 accept-dialin
  protocol l2tp
  virtual-template 1
 terminate-from hostname tb162_LAC1
 local name LNS1
 l2tp tunnel hello 90
 l2tp tunnel password 0 hello1
interface Loopback0
 ip address 10.1.1.3 255.255.255.0
interface Virtual-Template1
 ip unnumbered Loopback0
 no keepalive
 peer default ip address pool mypool
 ppp authentication chap
ip local pool mypool 10.1.1.10 10.1.1.50
radius-server host lns-radiusd  auth-port 1645 acct-port 1646
radius-server retransmit 3
radius-server key cisco

RADIUS Configuration Example

The following examples configure the RADIUS server to group sessions in a tunnel:

Per-User Configuration

user@router.com Password = "cisco" Service-Type = Outbound,
       Tunnel-Type = :1:L2TP,
       Tunnel-Server-Endpoint = :1:"10.14.10.54",
       Tunnel-Assignment-Id = :1:"router"
client@router.com Password = "cisco" Service-Type = Outbound,
       Tunnel-Type = :1:L2TP,
       Tunnel-Server-Endpoint = :1:"10.14.10.54",
       Tunnel-Assignment-Id = :1:"router"

Domain Configuration

eng.router.com Password = "cisco" Service-Type = Outbound,
        Tunnel-Type = :1:L2TP,
        Tunnel-Server-Endpoint = :1:"10.14.10.54",
        Tunnel-Assignment-Id = :1:"router"
sales.router.com Password = "cisco" Service-Type = Outbound,
        Tunnel-Type = :1:L2TP,
        Tunnel-Server-Endpoint = :1:"10.14.10.54",
        Tunnel-Assignment-Id = :1:"router"

Additional References

The following sections provide references related to the Configuring RADIUS Attribute 82: Tunnel Assignment ID.

Related Documents

Related Topic

Document Title

Virtual template interfaces and dial features

Cisco IOS XE Dial Technologies Configuration Guide , Release 2

Virtual private dialup networks (VPDNs)

Cisco IOS XE VPDN Configuration Guide , Release 2

RADIUS

“Configuring RADIUS” in the Cisco IOS XE Security Configuration Guide: Configuring User Services , Release 2.

Security commands

Cisco IOS Security Command Reference

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 XE software 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 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 RADIUS Attribute 82 Tunnel Assignment ID

The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/go/cfn. An account on Cisco.com is not required.

Table 1 Feature Information for RADIUS Attribute 82: Tunnel Assignment ID

Feature Name

Releases

Feature Information

RADIUS Attribute 82: Tunnel Assignment Id

Cisco IOS XE Release 2.1

The RADIUS Attribute 82: Tunnel Assignment ID feature allows the Layer 2 Transport Protocol access concentrator (LAC) to group users from different per-user or domain RADIUS profiles into the same active tunnel.

In Cisco IOS XE Release 2.1, support was added for the Cisco ASR 1000 Series Aggregation Services Routers.

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.