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Catalyst 3750 Switch Command Reference
OL-8552-07
Chapter 2 Catalyst 3750 Switch Cisco IOS Commands
clear ipv6 dhcp conflict
clear ipv6 dhcp conflict
Use the
clear ipv6 dhcp conflict
privileged EXEC command to clear an address conflict from the
Dynamic Host Configuration Protocol for IPv6 (DHCPv6) server database.
clear ipv6 dhcp conflict
{
*
|
IPv6-address
}
Note
This command is available only if you have configured a dual IPv4 and IPv6 Switch Database
Management (SDM) template on the switch.
Syntax Description
Defaults
No default is defined.
Command Modes
Privileged EXEC
Command History
Usage Guidelines
To configure the dual IPv4 and IPv6 template, enter the
sdm prefer
dual-ipv4-and-ipv6
{
default
|
vlan
} global configuration command, and reload the switch.
When you configure the DHCPv6 server to detect conflicts, it uses ping. The client uses neighbor
discovery to detect clients and reports to the server through a DECLINE message. If an address conflict
is detected, the address is removed from the pool, and the address is not assigned until the administrator
removes the address from the conflict list.
If you use the asterisk (
*
) character as the address parameter, DHCP clears all conflicts.
Examples
This example shows how to clear all address conflicts from the DHCPv6 server database:
Switch#
clear
ipv6 dhcp conflict *
Related Commands
*
Clear all address conflicts.
IPv6-address
Clear the host IPv6 address that contains the conflicting address.
Release
Modification
12.2(46)SE
This command was introduced.
Command
Description
Displays address conflicts found by a DHCPv6 server, or reported through
a DECLINE message from a client.
