O'Reilly logo

IS-IS: Deployment in IP Networks by Alvaro Retana, Russ White

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

IS-IS and Nonstop Forwarding

Downtime—planned or unplanned—is generally considered a bad thing, especially when the network is large, and the traffic through the network is business critical. There are two ways to reduce the impact of a network topology change: route around the change as quickly as possible, or try to find some way to not report the change to the rest of the network through continuous forwarding and quick recovery.

Nonstop Forwarding and Fast Convergence

These two options are, generally, mutually exclusive, or complementary. Routing around a topology change very quickly typically involves discovering the topology change as soon as possible and then propagating information about the change to the other intermediate systems in ...

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