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Cisco Ccna (640-553) Security Exam Training: Using The Access-list Compiled Command
Network administrators (like you) use the “access-list compiled” command to enable the Turbo Access Control Lists (Turbo ACL) feature. In other words, CCNA’s use this command to turn on the Turbo ACL feature on a router. The Turbo ACL feature, gives a router the ability to perform ACL acceleration processing; instead of normal ACL processing. Meaning, the router is able to scan thru the ACLs looking for the proper one (ACL); instead of sequentially searching for the proper one (ACL). And, once an ACL is found it is compiled for Turbo ACL acceleration processing. Note: In certain situations, this scanning and compilation may take a few seconds when the router is processing large and complex ACLs, or when the router is processing a configuration that contains a large number of ACLs. Also, if you decide to make a change to an ACL while it’s being accelerated, that ACL will automatically be recompiled. And, when Turbo ACL tables are being built (or rebuilt) for a particular ACL, the normal sequential ACL search is used until the new tables are ready for installation. Below is the command’s syntax: access-list compiled As you can see, the command is very simply to implement; it doesn’t use any keywords or arguments. Below is an example of the command being used: Router>enable Router#configure terminal Router(config)#access-list compiled Router(config)#exit Router#copy run start In the example above, the Turbo ACL feature is being enabled on the router. And, like with mostly all Cisco IOS commands; you can use the word “no” in front of the command to remove (disable) the configured command; like you see below: Router(config)#no access-list compiled By the way, if you decide to use the command, make sure your router(s) is running Cisco IOS 12.1(1)E or higher. I hope this article was very informative and helped you quickly understand the usage of the access-list compiled command. If you need to learn more; I suggest you visit my website, were you’ll find the latest information regarding the Cisco CCNA (640-553) Security exam techniques. To your success, Article Directory: http://www.articledashboard.com Charles Ross, CCNP #CSCO10444244 is the owner of Ittechtips.com; where you'll find free comprehensive information and videos on how to pass the CCNA (640-553) security exam. Sign-Up for "100 Free Videos" and, also learn more about the new "Cisco CCNA (640-553) Video Accelerated Training Course" at his website. www.ittechtips.com |
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