Configuring time ranges

About time ranges

You can implement a service based on the time of the day by applying a time range to it. A time-based service takes effect only in time periods specified by the time range. For example, you can implement time-based ACL rules by applying a time range to them.

The following basic types of time ranges are available:

• Periodic time range—Recurs periodically on a day or days of the week.
• Absolute time range—Represents only a period of time and does not recur.

The active period of a time range is calculated as follows:

1. Combining all periodic statements.
2. Combining all absolute statements.
3. Taking the intersection of the two statement sets as the active period of the time range.

Restrictions and guidelines: Time range configuration

When you configure the ACL hardware mode, follow these restrictions and guidelines:

• If a time range does not exist, the service based on the time range does not take effect.
• You can create a maximum of 1024 time ranges, each with a maximum of 32 periodic statements and 12 absolute statements.

Procedure

1. Enter system view.
   system-view

2. Create or edit a time range.
   time-range time-range-name { start-time to end-time days [ from time1 date1 ] [ to time2 date2 ] | from time1 date1 [ to time2 date2 ] | to time2
   date2 }
   If an existing time range name is provided, this command adds a statement to the time range.

Display and maintenance commands for time ranges

Execute the display command in any view.

Time range configuration examples

Example: Configuring a time range

Network configuration
As shown in Figure 1, configure an ACL on the device to allow Host A to access the server only during 8:00 and 18:00 on working days from June 2015 to the end of the year.
Figure 1 Network diagram

Procedure

Create a periodic time range between 8:00 and 18:00 on working days from

June 2015 to the end of the year.