display dhcp upgrade

Function

The display dhcp upgrade command displays the dhcp upgrade command configuration, including the number of users with new leases, number of users with old leases, number of users with permanent leases, and maximum remaining time for users with old leases to send renewal packets.

This command is supported only on the NetEngine 8000 F1A.

Format

display dhcp upgrade

Parameters

None

Views

All views

Default Level

1: Monitoring level

Task Name and Operations

Task Name	Operations
dhcp	read

Usage Guidelines

Usage Scenario

If the BRAS to be upgraded have DHCP users, run the dhcp upgrade command to modify leases of these users to a shorter period, so that DHCP users can get online by sending renewal packets after the BRAS is restarted after the upgrade.

The dhcp upgrade command cannot be saved to the configuration file. You need to run the display dhcp upgrade command to view the dhcp upgrade command configuration. Then you can calculate the restart time of the BRAS based on the number of users with old leases and maximum remaining time for users with old leases to send renewal packets.

Precautions

In VS mode, this command is supported only by the admin VS.

Example

The actual command output varies according to the device. The command output here is only an example.

# Display DHCP user leases.

<HUAWEI> system-view
[~HUAWEI] display dhcp upgrade
DHCP upgrade: enable.
Lease time: 0days 0hours 30minutes
Renew time: 0days 0hours 15minutes
Rebind time:0days 0hours 22minutes
Access DHCP user count of new lease: 100 
Access DHCP user count of old lease: 100
Access DHCP user count of infinite lease: 10
Max interval from current for old lifetime DHCP user renew: 0 days 0 hours 15 minutes

**Table 1** Description of the **display dhcp upgrade** command output
Item	Description
DHCP upgrade	Indicates whether the dhcp upgrade command is configured: If this command is configured, enable is displayed. If this command is not configured, disable is displayed.
Renew time	Renew time.
Access DHCP user count of new lease	Indicates the number of online DHCP users with new leases specified in the dhcp upgrade command.
Access DHCP user count of old lease	Indicates the number of online DHCP users with old leases.
Access DHCP user count of infinite lease	Indicates the number of online DHCP users with permanent leases. After the BRAS is restarted, these users can get online again only after their terminals are restarted.
Max interval from current for old lifetime DHCP user renew	Indicates the maximum remaining time for online DHCP users with old leases to send renewal packets.