This article puts forward the method of the application of SPF algorithm in IS-IS route after the introduction of the basic principle of SPF algorithm and the way of realizing the best calculation route with IS - IS SPF on Cisco Router.

• 本文在介绍了SPF算法的基本原理后,提出了将SPF算法应用于IS-IS路由计算的方法,以及在Cisco路由器上实现IS-IS SPF最佳路径计算的途径。