O'Reilly logo

IP Routing Primer by Robert Wright

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Discontiguous Networks, Subnet 0, and Summarization Using IGRP

During the process of researching the material for this section, an anomaly was discovered in the behavior of IGRP. IGRP would install a summarized route for a major network when the router had a connection to a subnet of the same major net—which is not supposed to happen. Cisco engineers discovered this behavior while reviewing the material for this book prior to publication.

The Cisco engineers opened a bug against it—CSCdj03421— and fixed the bug so that IGRP now behaves as expected. In other words, it behaves now exactly as in the previous section on RIP. This bug has been integrated in IOS versions 11.0, 11.1 (and all 11.1-based releases), 11.2 (and all 11.2-based releases), ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required