[WEBINAR] Bulletproof: How Today's Business Leaders Stay on Top

Dial-on-Demand Routing (DDR)

Definition - What does Dial-on-Demand Routing (DDR) mean?

Dial-on-Demand Routing (DDR) is a Cisco routing technique that initiates and closes circuit-switched data sessions on an automated and as-needed basis. DDR uses external terminal adapters that enable wide area network (WAN) routing connections via Public Switched Telephone Networks (PSTN) or Integrated Services Digital Networks (ISDN).

Techopedia explains Dial-on-Demand Routing (DDR)

DDR enables remote WAN data connections that automatically terminate after transmission activity ends. DDR is used with primary and backup connections. DDR connectivity is established in either of the following ways: Physical: A cable connects the PSTN to the computer's network interface card (NIC) for user communication. Digital: Point-to-Point Protocol (PPP) determines a connection logic for network signal function management (sending, receiving, compression). DDR provides a range of configuration commands, including: Phone companies establish connection switch types and local exchange termination points. Configuration depends on traffic setup triggers specified by standard or extended interface dialer access lists (like interesting traffic). Static routing remains constant to facilitate local and remote bidirectional reachability. During ISDN installation, PPP or High-Level Data Link Control (HDLC) enables encapsulation. After encapsulation, the host address implements IP addressing that is hard coded during global configuration or extracted from the local area network (LAN) interface address with the lowest number.
Share this:

Connect with us

Email Newsletter

Join thousands of others with our weekly newsletter

The 4th Era of IT Infrastructure: Superconverged Systems
The 4th Era of IT Infrastructure: Superconverged Systems:
Learn the benefits and limitations of the 3 generations of IT infrastructure – siloed, converged and hyperconverged – and discover how the 4th...
Approaches and Benefits of Network Virtualization
Approaches and Benefits of Network Virtualization:
Businesses today aspire to achieve a software-defined datacenter (SDDC) to enhance business agility and reduce operational complexity. However, the...
Free E-Book: Public Cloud Guide
Free E-Book: Public Cloud Guide:
This white paper is for leaders of Operations, Engineering, or Infrastructure teams who are creating or executing an IT roadmap.
Free Tool: Virtual Health Monitor
Free Tool: Virtual Health Monitor:
Virtual Health Monitor is a free virtualization monitoring and reporting tool for VMware, Hyper-V, RHEV, and XenServer environments.
Free 30 Day Trial – Turbonomic
Free 30 Day Trial – Turbonomic:
Turbonomic delivers an autonomic platform where virtual and cloud environments self-manage in real-time to assure application performance.