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show ip dhcp conflict(from cisco)

Cisco 林志斌 993浏览

show ip dhcp conflict

To display address conflicts found by a Cisco IOS Dynamic Host Configuration Protocol (DHCP) Server when addresses are offered to the client, use the show ip dhcp conflict EXEC command.

       show ip dhcp conflict [address]

 Syntax Description

address

(Optional) Specifies the IP address of the conflict found.

 Defaults

None

 Command Modes

EXEC

 Usage Guidelines

This command first appeared in Cisco IOS Release 12.0(1)T.

The server detects conflicts using pingThe client detects conflicts using gratuitous Address Resolution Protocol (ARP)If an address conflict is detected, the address is removed from the pool and the address will not be assigned until an administrator resolves the conflict.

 Examples

The following example displays the detection method and detection time for all IP addresses the DHCP server has offered that have conflicts with other devices. Table 3 lists descriptions of the fields in the example.

Router> show ip dhcp conflict 
IP address     Detection Method    Detection time 

172.16.1.32    Ping                Feb 16 1998 12:28 PM 

172.16.1.64    Gratuitous ARP      Feb 23 1998 08:12 AM 
 

             Table 3 show ip dhcp conflict Field Descriptions

Field

Description

IP Address

The IP address of the host as recorded on the DHCP server.

Detection Method

The manner in which the IP address of the hosts were found on the DHCP server. Can be a ping or a gratuitous ARP.

Detection time

The time when the conflict was found.


 Related Commands

clear ip dhcp conflict
ip dhcp ping packets
ip dhcp ping timeout


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