display arp ip-conflict track

Function

The display arp ip-conflict track command displays IP address conflict information.

Format

display arp ip-conflict track [ slot slot-id ] [ ip ip-address ]

Parameters

Parameter	Description	Value
slot slot-id	Displays IP address conflict information on an interface board in a specified slot.	The value is a string of 1 to 49 case-sensitive characters, spaces not supported.
ip ip-address	Displays conflict information of a specified IP address.	The value is in dotted decimal notation.

Parameter

Description

Value

slot slot-id

Displays IP address conflict information on an interface board in a specified slot.

The value is a string of 1 to 49 case-sensitive characters, spaces not supported.

ip ip-address

Displays conflict information of a specified IP address.

The value is in dotted decimal notation.

Views

All views

Default Level

1: Monitoring level

Task Name and Operations

Task Name	Operations
arp	read

Usage Guidelines

Usage Scenario

If IP address conflicts exist on a network, device routes will frequently flap, greatly affecting user services.

To faster locate the conflicting IP address and better manage devices' IP addresses, run the display arp ip-conflict track command to check IP address conflict information, including the conflicting IP address, MAC address corresponding to the IP address, number of IP address conflicts, date and time when an IP address conflict occurred, and number of times that the conflicting IP address is suppressed.

Example

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

# Display IP address conflict information.

<HUAWEI> display arp ip-conflict track
Conflict type       : Remote IP Confilct       
    IP address          : 3.3.3.3
    System time         : 04-13 08:44:11-08:00
    Conflict count      : 1                        
    Suppress count      : 0
    Old interface       : Ge0/1/1                 
    Receive interface   : Ge0/1/1
    Old VLAN/CEVLAN     : 0/0                      
    Receive VLAN/CEVLAN : 0/0
    Old MAC             : 00e0-fc63-8141           
    Receive MAC         : 00e0-fc63-8142
    Receive Head DMAC   : ffff-ffff-ffff
    Receive Head SMAC   : 00e0-fc63-8142

    Conflict type       : Local IP Confilct       
    Local IP address    : 4.3.3.3
    System time         : 04-13 08:44:11-08:00
    Conflict count      : 1                        
    Suppress count      : 0
    Local interface     : Ge0/1/2                 
    Receive interface   : Ge0/1/2
    Receive VLAN/CEVLAN : 0/0           
    Receive MAC         : 00e0-fc00-0002
    Receive Head DMAC   : ffff-ffff-ffff
    Receive Head SMAC   : 00e0-fc00-0002

    Conflict type       : Local-ce IP Confilct       
    IP address          : 5.3.3.3
    System time         : 04-13 08:44:11-08:00
    Conflict count      : 1                        
    Suppress count      : 0
    Local interface     : Ge0/1/3                 
    Receive interface   : Ge0/1/3                      
    Receive VLAN/CEVLAN : 0/0
    Local MAC           : 00e0-fc00-0003           
    Receive MAC         : 00e0-fc00-0008  
    Receive Head DMAC   : ffff-ffff-ffff
    Receive Head SMAC   : 00e0-fc63-8142

**Table 1** Description of the **display arp ip-conflict track** command output
Item	Description
Conflict type	Conflict type. Local IP conflict: The local device has an IP address conflict with another device. Remote IP conflict: The local device functions as an access device and detects an IP address conflict between connected devices or users. Local-ce IP conflict: In a heterogenous interworking scenario, a PE detects that the IP address or MAC address of the connected CE is different from that configured on the PE using the local-ce ip or local-ce mac command.
Conflict count	Number of IP address conflicts. If the ARP entry corresponding to the IP address is aged or deleted, this field is cleared.
IP address	Conflicting IP address. When the conflict type is Local-ce IP conflict, this field indicates the IP address of the CE device when the conflict occurs.
System time	Date and time when an IP address conflict occurred.
Suppress count	Number of times that IP address conflicts are suppressed. If the ARP entry corresponding to the IP address is aged or deleted, this field is cleared.
Old interface	Interface recorded in the ARP entry corresponding to the IP address before the conflict. If the conflict type is Local IP conflict or Local-ce IP conflict, this field is displayed as Local interface, indicating the interface where the conflicting IP address resides.
Old VLAN/CEVLAN	VLAN and CE VLAN recorded in the ARP entry corresponding to the IP address before the conflict. Old MAC is displayed only when Conflict type is Remote IP conflict.
Old MAC	MAC address recorded in the ARP entry corresponding to the IP address before the conflict. Old MAC is displayed only when Conflict type is Remote IP conflict.
Receive interface	Interface that receives an ARP packet when a conflict occurs.
Receive VLAN/CEVLAN	VLAN and CE VLAN that receive ARP packets during a conflict.
Receive MAC	Source MAC address in the ARP packet received during a conflict.
Receive Head DMAC	Destination MAC address in the Ethernet header in the received ARP packet when an IP address conflict occurs.
Receive Head SMAC	Source MAC address in the Ethernet header in the received ARP packet when an IP address conflict occurs.
Local interface	Interface where the conflicting IP address resides. When the conflict type is Remote IP conflict, this field is displayed as Old interface, indicating the interface that learns the ARP entry corresponding to the IP address before the conflict.
Local MAC	Value of local-ce mac configured on the interface. If local-ce mac is not configured, the value of this field is displayed as 0000-0000-0000. Old MAC is displayed only when Conflict type is Local-ce IP conflict.
Local IP address	Conflicting IP address.