Time Range of an ACL
A time range can be specified in an ACL to filter packets based on the time range. This is applicable when some ACL rules are required to be valid ONLY during a certain period of time. For example, if staff members are prohibited from browsing entertainment websites during business hours but are allowed to visit these entertainment websites after hours, a time range must be defined for an ACL to specify these conditions. To implement this function, configure one or more time ranges, and reference time ranges using commands.
If no time range referenced by the rule is configured, the rule does not take effect until the referenced time range is specified and the system time is within the specified time range.