1-4
z If only a periodic time section is defined in a time range, the time range is active only when the
system time is within the defined periodic time section. If multiple periodic time sections are defined
in a time range, the time range is active only when the system time is within one of the periodic time
sections.
z If only an absolute time section is defined in a time range, the time range is active only when the
system time is within the defined absolute time section. If multiple absolute time sections are
defined in a time range, the time range is active only when the system time is within one of the
absolute time sections.
z If both a periodic time section and an absolute time section are defined in a time range, the time
range is active only when the periodic time range and the absolute time range are both matched.
Assume that a time range contains an absolute time section ranging from 00:00 January 1, 2004 to
23:59 December 31, 2004, and a periodic time section ranging from 12:00 to 14:00 on every
Wednesday. This time range is active only when the system time is within the range from 12:00 to
14:00 on every Wednesday in 2004.
z If the start time is not specified, the time section starts from 1970/1/1 00:00 and ends on the
specified end date. If the end date is not specified, the time section starts from the specified start
date to 2100/12/31 23:59.
Configuration Example
# Define a periodic time range that spans from 8:00 to 18:00 on Monday through Friday.
<Sysname> system-view
[Sysname] time-range test 8:00 to 18:00 working-day
[Sysname] display time-range test
Current time is 13:27:32 Apr/16/2005 Saturday
Time-range : test ( Inactive )
08:00 to 18:00 working-day
# Define an absolute time range spans from 15:00 1/28/2006 to 15:00 1/28/2008.
<Sysname> system-view
[Sysname] time-range test from 15:00 1/28/2006 to 15:00 1/28/2008
[Sysname] display time-range test
Current time is 13:30:32 Apr/16/2005 Saturday
Time-range : test ( Inactive )
From 15:00 Jan/28/2000 to 15:00 Jan/28/2004
Configuring Basic ACL
A basic ACL filters packets based on their source IP addresses.
A basic ACL can be numbered from 2000 to 2999.
Configuration Prerequisites
z To configure a time range-based basic ACL rule, you need to create the corresponding time range
first. For information about time range configuration, refer to section
Configuring Time Range.
z The source IP addresses based on which the ACL filters packets are determined.
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