Junos Enterprise Routing, 2nd Edition

Conclusion

Junos software PIPs and routing policy may not be very sexy by themselves, but together they form the foundation of virtually all sophisticated network configurations.

The PIP toolbox provides many useful tools that allow you to create static and aggregate routes, create and group route tables, and alter protocol preferences. Routing policy provides a powerful and consistent set of rules and syntax that supplies fine-grained control over the exchange of routes, along with modification of route attributes. Once you understand the basic concepts of import and export policy, you quickly come to appreciate the elegance of being able to perform similar tasks on different protocols, using the same policy framework, rather than a collection of mechanisms such as route maps, distribute lists, network statements, and so on, which may or may not work in a given protocol context.

When combined, PIP and policy yield a powerful mechanism that enables you to bend a network’s operation to suit your will. The skills and concepts covered in this chapter are demonstrated throughout the remainder of this book, in various real-world and practical scenarios.