Caching Technique Case Study
In previous sections about Cisco switching techniques, we discussed how fast switching is performed, how cache is created from the routing table, and what information is kept in cache. You might be wondering how the cache is populated. During the case study, the text discusses what happens when a packet that must be fast-switched reaches the router.
The cache is built from the routing table. In the scheme prior to CEF, the routing table is built when the routing protocol injects routes. Before a packet is forwarded, a process performs a lookup in the routing table and decides how the packet should be forwarded. Each entry in the routing table for the network is considered. An example of entries in the routing table ...
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