It provides configuration guidelines for switching paths and tuning guidelines. For a complete description of fast switching commands used in this chapter, refer to the Cisco IOS Switching Services Command Reference . For documentation on other commands that appear in this chapter, you can use the command reference master index or search online. Fast Switching Configuration Task List Fast switching allows higher throughput by switching a packet using a cache created by the initial packet sent to a particular destination. Destination addresses are stored in the high-speed cache to expedite forwarding.
Routers offer better packet-transfer performance when fast switching is enabled.
Fast switching is enabled by default on all interfaces that support fast switching. Enabling AppleTalk Fast Switching AppleTalk access lists are automatically fast switched. Access list fast switching improves the performance of AppleTalk traffic when access lists are defined on an interface. Enabling IP Fast Switching Fast switching involves the use of a high-speed switching cache for IP routing. Destination IP addresses are stored in the high-speed cache to expedite packet forwarding.