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Catalyst 3750 Metro Switch Command Reference
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Chapter 2 Catalyst 3750 Metro Switch Cisco IOS Commands
ipv6 dhcp ping packets
ipv6 dhcp ping packets
Use the ipv6 dhcp ping packets global configuration command to specify the number of packets a
Dynamic Host Configuration Protocol for IPv6 (DHCPv6) server sends to a pool address as part of a
ping operation. To prevent the server from pinging pool addresses, use the no form of this command.
ipv6 dhcp ping packets number
no ipv6 dhcp ping packets
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 The default is 0.
Command Modes Global configuration
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.
The DHCPv6 server pings a pool address before assigning it to a requesting client. An unanswered ping
indicates that the address is not in use and the server assigns the address to the requesting client.
Setting the number argument to 0 turns off the DHCPv6 server ping operation.
Examples This example specifies two ping attempts by the DHCPv6 server before further ping attempts stop:
Switch(config)# ipv6 dhcp ping packets 2
Related Commands
number The number of ping packets sent before the address is assigned to a
requesting client. The range is 0 to 10.
Release Modification
12.2(52)SE This command was introduced.
Command Description
clear ipv6 dhcp
conflict
Clears an address conflict from the DHCPv6 server database.
show ipv6 dhcp
conflict
Displays address conflicts found by a DHCPv6 server or reported through
a DECLINE message from a client.
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