10.1
Acess Lists
10.1.4
Configuring access list descriptions with the remark command
To make access list configuration easier on administrators, Cisco IOS version 12.0.2(T) introduced the remark command. Access list remarks, or comments, are used to include documentation and descriptions to facilitate the understanding of all or parts of a specific access list. By describing your lists in simple terms, you can quickly sum up the router's configuration -- without having to sift through dozens of access list statements in an attempt to piece together its function. Good programmers use remarks liberally in their programs to describe the function of certain blocks of code.

The syntax for adding a remark to a numbered access list is as follows:

router(config)#access-list access-list-number remark remark

When configuring a named access list, you issue the remark command in named access list configuration mode:

router(config-std-nacl)#remark remark

After entering the remark keyword, you can include an alphanumeric string of up to 100 characters to describe the access list. It is good form to enter a remark statement before configuring the permits and denies. That way the description will appear as the first entry in the configuration file. In a long list, you may want to include multiple remark statements and enter them before the part of the list that you want to describe. The figure illustrates proper use of the remark option.