IS-IS SPF Operation on Cisco Routers
The actual implementation of a protocol on a specific router platform is mostly transparent to the network operator, and interoperability between products from different vendors is guided by compliance to standards. The details of a specific vendor implementation and software coding also are frequently proprietary information. However, a network engineer seeking a better understanding of IS-IS and the mechanics of operation on a specific platform might benefit significantly from studying various parameters, such as default timers, flags, and other default constants, and how they are configured. Additionally, specifications such as ISO 10589 and RFC 1195 provide useful guidance. This section provides some insights ...
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