- Overview of Dial Interfaces, Controllers, and Lines
- Configuring Asynchronous Lines and Interfaces
- Asynchronous Call Queueing by Role
- Configuring Asynchronous Serial Traffic Over UDP
- Configuring and Managing Integrated Modems
- 1- and 2-Port V.90 Modem WICs for Cisco 2600 and Cisco 3600 Series Multiservice Platforms
- Call Tracker show Commands Extensions
- Cisco NM-8AM-V2 and NM-16AM-V2 Analog Modem Network Modules with V.92
- MICA and NextPort Modem Tech-Support Command Additions
- PIAFS Wireless Data Protocol Version 2.1 for Cisco MICA Modems
- V.92 and V.44 Support for Digital Modems
- V.92 Modem on Hold for Cisco AS5300 and Cisco AS5800 Universal Access Servers
- V.92 Modem on Hold for Cisco AS5350, Cisco AS5400, and Cisco AS5850 Universal Gateways and Cisco AS5800 Universal Access Servers
- V.92 Quick Connect for Cisco AS5300 and Cisco AS5800 Universal Access Servers
- V.92 Quick Connect for Cisco AS5350, Cisco AS5400, and Cisco AS5850 Universal Gateways and Cisco AS5800 Universal Access Servers
- V.92 Reporting Using RADIUS Attribute v.92-info
- Configuring and Managing Cisco Access Servers and Dial Shelves
- Configuring and Managing External Modems
- Modem Signal and Line States
- Creating and Using Modem Chat Scripts
- Cisco Modem User Interface
- Modem Script and System Script Support in Large-Scale Dial-Out
- Leased and Switched BRI Interface for ETSI NET3
- ISDN BCAC and Round-Robin Channel Selection Enhancements
- Configuring Virtual Asynchronous Traffic over ISDN
- Configuring Modem Use over ISDN BRI
- Configuring X.25 on ISDN
- Configuring X.25 on ISDN Using AO/DI
- Configuring ISDN on Cisco 800 Series Routers
- Cisco IOS Software Feature Removal
- Configuring ISDN PRI
- Dialing Number Enhancement
- ISDN BCAC and Round-Robin Channel Selection Enhancements
- Configuring ISDN Special Signaling
- Configuring Network Side ISDN PRI Signaling, Trunking, and Switching
- Preparing to Configure DDR
- Configuring Legacy DDR Spokes
- Configuring Legacy DDR Hubs
- Configuring Peer-to-Peer DDR with Dialer Profiles
- Dialer Map VRF-Aware for an MPLS VPN
- Dialer Persistent
- PPPoE Client DDR Idle-Timer
- Redial Enhancements
- Rotating Through Dial Strings
- Configuring Dialer CEF
- CEF Support for Dialer Profiles on Cisco 7500 Routers
- Configuring Snapshot Routing
- Reliable Static Routing Backup Using Object Tracking
- Configuring Dial Backup for Serial Lines
- Configuring Dial Backup Using Dialer Watch
- Dialer Watch Connect Delay
- VRF Aware Dialer Watch
- Configuring Dial Backup with Dialer Profiles
- ISDN Backup in MPLS Core
- Configuring Cisco Easy IP ..
- Configuring Virtual Template Interfaces
- Multiclass Multilink PPP
- Configuring Asynchronous Callback
- Configuring PPP Callback
- Configuring ISDN Caller ID Callback
- Configuring BACP
- Configuring an IP Local Pools Holdback Timer
- Configuring per-User Configuration
- Configuring Resource Pool Management
- Configuring Wholesale Dial Performance Optimization
- Large-Scale Dial-Out
- Dial-Out DS0 Level Trunk Group
- L2TP Large-Scale Dial-Out
- L2TP Large-Scale Dial-Out per-User Attribute via AAA
- Modem Script and System Script Support in Large-Scale Dial-Out
- Large-Scale Dial-Out (LSDO) VRF Aware
- Peer Pool Backup
- Dial Networking Business Applications
- Enterprise Dial Scenarios and Configurations
- Telco and ISP Typical Dial Scenarios and Configurations
- Modem Initialization Strings
PPPoE Client DDR Idle-Timer
The PPPoE Client DDR Idle-Timer feature supports the dial-on-demand routing (DDR) interesting traffic control list functionality of the dialer interface with a PPP over Ethernet (PPPoE) client, but also keeps original functionality (PPPoE connection up and always on after configuration) for those PPPoE clients that require it.
Feature Specifications for the PPPoE Client DDR Idle-Timer Feature
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Contents
Prerequisites for Using the PPPoE Client DDR Idle-Timer
Before configuring the PPPoE Client DDR Idle-Timer feature, you must understand the concept of DDR interesting packets and access control lists and PPPoE Stage Protocols. See the “Additional References” section for links to the documents describing these concepts.
Information About the PPPoE Client DDR Idle-Timer
To configure the PPPoE client DDR idle-timer, you need to understand the following concept:
DDR Functionality and the PPPoE Client
Before Cisco IOS Release 12.2(13)T, the DDR interesting traffic control list functionality of the dialer interface was not supported for PPPoE. However, the PPPoE Client DDR Idle-Timer feature, available as part of Cisco IOS Release 12.2(13)T, now supports this DDR functionality for a PPPoE client.
Protocol access lists and dialer access lists are central to the operation of DDR. Access lists are used as the screening criteria for determining when to initiate DDR calls. All packets are tested against the dialer access list. Packets that match a permit entry are deemed interesting. Packets that do not match a permit entry or that do match a deny entry are deemed uninteresting. When a packet is found to be interesting, either the dialer idle timer is reset (if the line is active) or a connection is attempted (assuming the line is available but not active). If a tested packet is deemed uninteresting, it will be forwarded if it is intended for a destination known to be on a specific interface and the link is active. However, such a packet will not initiate a DDR call and will not reset the idle timer. If dialer idle timer expires, the dialer interface calls a PPPoE function to tear down the connection.
A new command, pppoe-client dial-pool-number, allows configuring a DDR interesting traffic control list for PPPoE connections, but also keeps original connection functionality for those PPPoE clients that require it. If you do not require DDR, the PPPoE connection will be up and always on after configuration. If you do require DDR functionality, the connection will be brought up when interesting traffic comes in from the LAN interface and brought down after the dialer idle timer expires. Interesting traffic that comes from WAN interface will only reset the dialer idle timer.
Protocol access lists and dialer access lists have already been implemented in the dialer interface for the operation of DDR. For a PPPoE client, access lists are used as the screening criteria for determining if PPPoE Discovery initiation or a dialer idle timer reset is needed. But a protocol access list is not required for this feature; it depends on your network needs. An access-list can be configured and associated with dialer-list, or you can configure only the dialer list.
All packets destined to the dialer interface are tested against the dialer access list. Packets that match a permit entry are deemed interesting. Packets that do not match a permit entry or that do match a deny entry are deemed uninteresting. When a packet is found to be interesting, the dialer idle timer will be reset if the PPPoE session has already been set up, or a PPPoE Discovery will be attempted if there is no PPPoE session. If a tested packet is deemed uninteresting, it will not initiate PPPoE Discovery and will not reset the idle timer.
How to Configure the PPPoE Client DDR Idle-Timer
This section contains the following procedures. Each procedure is identified as either required or optional.
- Configure the PPPoE Client DDR Idle-Timer on an ATM PVC Interface (required)
- Configure the PPPoE Client DDR Idle-Timer on an Ethernet Interface (required)
- Configure the Dialer Interface (required)
Configure the PPPoE Client DDR Idle-Timer on an ATM PVC Interface
To configure the PPPoE client DDR idle-timer in interface-ATM-VC configuration mode, use the following commands:
SUMMARY STEPS
2.
configure { terminal | memory | network }
3. interface atm atm-interface-number
DETAILED STEPS
What to Do Next
To support DDR functionality for the PPPoE client, DDR functionality must be configured. See the “Configure the Dialer Interface” section for the steps to do this.
Configure the PPPoE Client DDR Idle-Timer on an Ethernet Interface
To configure the PPPoE client DDR idle-timer on an Ethernet interface, use the following commands:
SUMMARY STEPS
2. configure { terminal | memory | network }
DETAILED STEPS
What to Do Next
To support DDR functionality for the PPPoE client, DDR functionality must be configured. See the “Configure the Dialer Interface” section for the steps to do this.
Configure the Dialer Interface
To configure the dialer interface (required when using the pppoe-client dial-pool-number command), you must also configure the following commands:
SUMMARY STEPS
2. configure { terminal | memory | network }
3. interface dialer dialer-rotary-group-number
4. dialer idle-timeout seconds [ inbound | either ]
5. dialer hold-queue packets [ timeout seconds ]
8. dialer-list dialer-group protocol protocol-name { permit | deny | list access-list-number | access-group }
DETAILED STEPS
Configuration Examples for PPPoE Client DDR Idle-Timer
This section provides configuration examples to match the identified configuration tasks in the previous sections. The dialer interface configurations for each interface type required by the pppoe-client dial-pool-number command are included in the following client configuration examples:
PPPoEoA Client Configuration Example
The following example shows how to configure the PPPoE client DDR idle-timer on an ATM PVC interface:
PPPoEoE Client Configuration Example
The following example shows how to configure the PPPoE client DDR idle-timer on an Ethernet interface:
Additional References
For additional information related to the PPPoE client DDR idle-timer, refer to the following references:
Related Documents
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Cisco IOS Dial Technologies Configuration Guide. See the section “Configuring Access Control for Outgoing Calls “ in the chapter “Configuring Legacy DDR Hubs.” |
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DDR and dialer commands: complete command syntax, command mode, defaults, usage guidelines, and examples |
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Cisco IOS Broadband Access Aggregation and DSL Configuration Guide. |
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PPPoE configuration commands: complete command syntax, command mode, defaults, usage guidelines, and example |
Standards
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MIBs
To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:
http://tools.cisco.com/ITDIT/MIBS/servlet/inde x
If Cisco MIB Locator does not support the MIB information that you need, you can also obtain a list of supported MIBs and download MIBs from the Cisco MIBs page at the following URL:
http://www.cisco.com/public/sw-center/netmgmt/cmtk/mibs.shtml
To access Cisco MIB Locator, you must have an account on Cisco.com. If you have forgotten or lost your account information, send a blank e-mail to cco-locksmith@cisco.com. An automatic check will verify that your e-mail address is registered with Cisco.com. If the check is successful, account details with a new random password will be e-mailed to you. Qualified users can establish an account on Cisco.com by following the directions found at this URL:
RFCs
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Technical Assistance
Command Reference
The following modified command is pertinent to this feature. To see the command pages for this command and other commands used with this feature, go to the Cisco IOS Master Commands List, at http://www.cisco.com/en/US/docs/ios/mcl/allreleasemcl/all_book.html.
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