Enhanced Interior Gateway Routing Protocol


Abbreviated as EIGRP, an evolved version of IGRP that addresses the demands of large-scale internetworks and the changes in network technology that have been developed since the implementation of IGRP. Routers that already use IGRP can use EIGRP because the metrics for both protocols are directly translatable, i.e., they are as easily comparable as if they were routes that originated in their own autonomous systems.

A router running EIGRP stores copies of all its neighbors’ routing tables so that it can quickly adapt to alternate routes. If no appropriate route exists, EIGRP queries its neighbors to discover an alternate route. These queries propagate until an alternate route is found. Unlike some earlier routing protocols that would send an entire table to neighboring routers when one routing table entry changed, EIGRP notifies the neighbors of only the specific change in the table.

Unlike IGRP, EIGRP uses the Diffusing-Update Algorithm (DUAL) developed at SRI International.

Read Also:

  • Enhanced Keyboard

    (1) A 101- or 102-key keyboard from IBM that supersedes the keyboard for the PC /AT computer. The most significant difference between the enhanced keyboard and previous models is that the enhanced keyboard has a row of 12 function keys at the top instead of 10 function keys grouped on the left side of the […]

  • Enhanced Message Service

    Abbreviated as EMS, an application-level extension to SMS for cellular phones available on GSM, TDMA and CDMA networks. An EMS-enabled mobile phone can send and receive messages that have special text formatting (such as bold or italic), animations, pictures, icons, sound effects and special ring tones. EMS messages that are sent to devices that do […]

  • Enter key

    A key that moves the cursor (or insertion point) to the beginning of the next line, or returns control to whatever program is currently running. After a program requests information from you (by displaying a prompt), it will usually not respond to your input until you have pressed the Enter or Return key. This allows […]

  • Enterprise Collaboration Systems ECS

    Abbreviated as ECS, Enterprise Collaboration Systems is a type of information system (IS). ECS is a combination of groupware, tools, Internet, extranets and other networks needed to support enterprise-wide communications, such as the sharing of documents and knowledge to specific teams and individuals within the enterprise. Some examples of enterprise communication tools include e-mail, videoconferencing, […]

  • Enterprise Content Management

    Abbreviated as ECM, Enterprise Content Management is the document management term which describes the technologies used by organizations to capture, manage, store, and control enterprise-wide content, including documents, images, e-mail messages, instant messages, video, and more. ECM software is used to assist in content control associated with business process, and can be used to assure […]


Disclaimer: Enhanced Interior Gateway Routing Protocol definition / meaning should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. All content on this website is for informational purposes only.