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IPv4 Access Control Lists (ACLs)
Overview
• The CLI remark command option allows you to enter a separate
comment for each ACE.
■ A source or destination IPv4 address and a mask, together, can define
a single host, a range of hosts, or all hosts.
■ Every ACL populated with one or more explicit ACEs includes an
Implicit Deny as the last entry in the list. The switch applies this action
to any packets that do not match other criteria in the ACL. (For
standard ACLs, the Implicit Deny is deny any. For extended ACLs, it
is deny ip any any.)
■ In any ACL, you can apply an ACL log function to ACEs that have an
explicit “deny” action. The logging occurs when there is a match on
a “deny” ACE (except when the ACL is used for mirroring). The switch
sends ACL logging output to Syslog, if configured, and, optionally, to
a console session.
You can create ACLs for the switch configuration using either the CLI or a text
editor. The text-editor method is recommended when you plan to create or
modify an ACL that has more entries than you can easily enter or edit using
the CLI alone. Refer to “Creating or Editing ACLs Offline” on page 9-94.
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