Catalyst 3750-E and 3560-E Switch Cisco IOS ... - DNIP . NET

Chapter 2Catalyst 3750-E and 3560-E Switch Cisco IOS Commandsipv6 dhcp serveripv6 dhcp serverUse the ipv6 dhcp server interface configuration command on the switch stack or on a standalone switchto enable Dynamic Host Configuration Protocol for IPv6 (DHCPv6) service on an interface. To disableDHCPv6 service on an interface, use the no form of this command.ipv6 dhcp server [poolname | automatic] [rapid-commit] [preference value] [allow-hint]no ipv6 dhcp server [poolname | automatic] [rapid-commit] [preference value] [allow-hint]NoteThis command is available only if you have configured a dual IPv4 and IPv6 Switch DatabaseManagement (SDM) template on the switch.Syntax Descriptionpoolnameautomaticrapid-commitpreference valueallow-hint(Optional) User-defined name for the IPv6 DHCP pool. The pool name canbe a symbolic string (such as Engineering) or an integer (such as 0).(Optional) Enable the server to automatically determine which pool to usewhen allocating addresses for a client.(Optional) Allow two-message exchange method.(Optional) The preference value carried in the preference option in theadvertise message sent by the server. The range is from 0 to 255. Thepreference value default is 0.(Optional) Specify whether the server should consider client suggestions inthe SOLICIT message. By default, the server ignores client hints.DefaultsBy default, no DHCPv6 packets are serviced on the interface.Command ModesInterface configurationCommand HistoryRelease12.2(46)SEModificationThe automatic keyword was added to the command.Usage GuidelinesThe ipv6 dhcp server interface configuration command enables DHCPv6 service on a specifiedinterface.The automatic keyword enables the system to automatically determine which pool to use whenallocating addresses for a client. When an IPv6 DHCP packet is received by the server, the serverdetermines if it was received from a DHCP relay or if it was directly received from the client. If thepacket was received from a relay, the server verifies the link-address field inside the packet associatedwith the first relay that is closest to the client. The server matches this link-address against all addressprefix and link-address configurations in IPv6 DHCP pools to find the longest prefix match. The serverselects the pool associated with the longest match.OL-9776-08Catalyst 3750-E and 3560-E Switch Command Reference2-291