Chapter 7. Protection and Restoration
This chapter covers the following topics:
Networks fail. More precisely, pieces of networks fail. Lots of things can cause something to fail in a network. They run the gamut from loosely connected cables to fiber cuts. Router crashes are another form of failure.
From a router's perspective, there are two kinds of failures in a network—link failures and node failures. It doesn't matter what the underlying cause is. A link failure can be a fiber cut, an ADM problem, or any number of other things. A node failure can be anything from a power problem to a router crash to a router being taken down ...
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