domain-set dns aging-time

Function

The domain-set dns aging-time command sets the minimum and maximum DNS aging time for a domain group.

The undo domain-set dns aging-time command restores the minimum and maximum DNS aging time of a domain group to the default values.

Format

domain-set dns aging-time minimum minimum-num maximum maximum-num

undo domain-set dns aging-time

Parameters

Parameter	Description	Value
minimum-num	Specifies the minimum DNS aging time.	The value is an integer that ranges from 10 to 28800, in minutes. The default value is 30.
maximum-num	Specifies the maximum DNS aging time.	The value is an integer that ranges from 10 to 28800, in minutes. The default value is 14400.

Views

System view

Default Level

2: Configuration level

Usage Guidelines

This command is supported by V600R007C20SPC603 and later versions.

Usage Scenario

If the aging time of response packets sent by the DNS server to resolve domain names in a domain group is shorter than the minimum DNS aging time of a domain group configured on the FW, the aging time becomes the minimum DNS aging time of the domain group.
If the aging time of response packets sent by the DNS server to resolve domain names in a domain group is longer than the maximum DNS aging time of a domain group configured on the FW, the aging time becomes the maximum DNS aging time of the domain group.
If the aging time of response packets sent by the DNS server to resolve domain names in a domain group is between the minimum and maximum DNS aging time of a domain group configured on the FW, the aging time remains unchanged.

In any view, you can run the display domain-set command to check the aging time of response packets sent by the DNS server to resolve domain names in a domain group. You can run the display current-configuration | include dns aging-time command to view the minimum and maximum DNS aging time of a domain group configured on the FW.

Precaution

The minimum DNS aging time of a domain group must be smaller than or equal to the maximum DNS aging time.

Example

# Set the minimum DNS aging time of a domain group to 50 minutes and the maximum DNS aging time to 1000 minutes.

<sysname> system-view
[sysname] domain-set dns aging-time minimum 50 maximum 1000