Ipv6 Dhcp Server - Cisco Catalyst 3750 Metro Command Reference Manual

Chapter 2 Catalyst 3750 Metro Switch Cisco IOS Commands

ipv6 dhcp server

Use the ipv6 dhcp server interface configuration command to enable Dynamic Host Configuration
Protocol for IPv6 (DHCPv6) service on an interface. To disable DHCPv6 service on an interface, use the
no form of this command.
This command is available only if you have configured a dual IPv4 and IPv6 Switch Database
Note
Management (SDM) template on the switch.
Syntax Description poolname
automatic
allow-hint
preference value
rapid-commit
Defaults
By default, no DHCPv6 packets are serviced on the interface.
Command Modes
Interface configuration
Command History Release
12.2(52)SE
Usage Guidelines
The ipv6 dhcp server interface configuration command enables DHCPv6 service on a specified
interface.
If you enter the automatic keyword, the system automatically determine which pool to use when
allocating addresses for a client. When the server receives an IPv6 DHCP packet, the server determines
if it was received from a DHCP relay or if it was directly received from the client. If the packet was
received from a relay, the server verifies the link-address field inside the packet associated with the first
relay that is closest to the client. The server matches this link-address against all address prefix and
link-address configurations in IPv6 DHCP pools to find the longest prefix match. The server selects the
pool associated with the longest match.
OL-9645-10
ipv6 dhcp server [poolname | automatic] [allow-hint] [rapid-commit] [preference value]
no ipv6 dhcp server
(Optional) User-defined name for the IPv6 DHCP pool. The pool name can
be a symbolic string (such as Engineering) or an integer (such as 0).
(Optional) Enable the server to automatically determine which pool to use
when allocating addresses for a client.
(Optional) Specify whether the server should consider client suggestions in
the SOLICIT message. By default, the server ignores client suggestions.
(Optional) The preference value carried in the preference option in the
advertise message sent by the server. The range is from 0 to 255. The default
is 0.
(Optional) Allow two-message exchange method.
Modification
The automatic keyword was added to the command.
Catalyst 3750 Metro Switch Command Reference
ipv6 dhcp server
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