4000 Router Series Layer 3 - IP Services Command Reference

• Before assigning an IP address to a DHCP client, the DHCP server pings the IP address and

discovers that it has been used by other host.

• The DHCP client sends a DECLINE packet to the DHCP server to inform the server of an IP address

conflict.

• The DHCP server discovers that the only assignable address in the address pool is its own IP

address.

Examples

# Display information about all IP address conflicts.

<Sysname> display dhcp server conflict

IP address Detect time

4.4.4.1 Apr 25 16:57:20 2007

4.4.4.2 Apr 25 17:00:10 2007

Table 4 Command output

Field Description

IP address Conflicted IP address.

Detect time Time when the conflict was discovered.

Related commands

reset dhcp server conflict

display dhcp server expired

Use display dhcp server expired to display the lease expiration information.

Syntax

display dhcp server expired [ ip ip-address | pool pool-name ]

Views

Any view

Predefined user roles

network-admin

network-operator

Parameters

ip ip-address: Displays lease expiration information about the specified IP address.

pool pool-name: Displays lease expiration information about the specified address pool. The pool name

is a case-insensitive string of 1 to 63 characters.

Usage guidelines

If you do not specify any parameter, this command displays lease expiration information about all

address pools.

DHCP assigns these expired IP addresses to DHCP clients when all available addresses have been

assigned.