Specifications

SecureStack C3 Configuration Guide 19-1

DHCPv6 Configuration

ThecommandsdescribedinthischapterperformconfigurationoftheDynamicHost

ConfigurationProtocolforIPv6(DHCPv6)ontheSecureStackC3.

Overview

DHCPisgenerallyusedbetweenclients(forexample,hosts)andservers(forexample,routers)for

thepurposeofassigningIPaddresses,gateways,andothernetworkingdefinitionssuchasDNS,

NTP,and/orSIPparameters.However,IPv6nativelyprovidesforauto‐configurationofIP

addressesthroughtheIPv6NeighborDiscoveryProtocol(NDP)and

theuseofRouter

Advertisementmessages.Thus,theroleofDHCPv6withinthenetworkisdifferentfromDHCPv4

inthatitislessrelieduponforIPaddressassignment.

DHCPv6serverandclientinteractionsaredescribedbyRFC3315.Therearemanysimilarities

betweenDHCPv6andDHCPv4interactionsandoptions,

butthemessagesandoptiondefinitions

aresufficientlydifferent.Thereisnomigrationorinter‐operabilityfromDHCPv4toDHCPv6.

DHCPv6incorporatesthenotionofthestatelessserver,whereDHCPv6isnotusedforIPaddress

assignmenttoaclient.Instead,itonlyprovidesothernetworkinginformationsuchasDNS,NTP,

and/orSIPinformation.ThestatelessserverbehaviorisdescribedbyRFC3736,whichsimply

containsdescriptionsoftheportionsofRFC3315thatarenecessaryforstatelessserverbehavior.

InorderforaroutertodriveaDHCPv6clienttoutilizestatelessDHCPv6,the“otherstateful

configuration”optionmustbeconfigured

forneighbordiscoveryonthecorrespondingIPv6

routerinterface.ThisinturncausesDHCPv6clientstosendtheDHCPv6“InformationRequest”

messageinresponse.ADHCPv6serverthenrespondsbyprovidingonlynetworkingdefinitions

suchasDNSdomainnameandserverdefinitions,NTPserverdefinitions,and/orSIPdefinitions.

* IPv6 Routing License Required *

IPv6 routing must be enabled with a license key in order to use this feature. If you have purchased an IPv6

routing license key, and have enabled routing on the device, you must activate your license as described in

“Activating Licensed Features” on page 3-29 in order to enable the DHCPv6 configuration command set. If

you wish to purchase an IPv6 routing license, contact Enterasys Networks Sales.

For information about... Refer to page...

Global Configuration Commands 19-2

Address Pool Configuration Commands 19-6

Interface Configuration Commands 19-10

DHCPv6 Show Commands 19-13