185Step Command Remarks3. Enable the DHCPv6server on the interface. ipv6 dhcp select serverBy default, the interface discardsDHCPv6 packets from DHCPv6clients.4. Configure anaddress/prefixassignment method.• Configure global addressassignment:ipv6 dhcp server { allow-hint |preference preference-value |rapid-commit } *• Apply a DHCPv6 address pool tothe interface:ipv6 dhcp server apply poolpool-name [ allow-hint |preference preference-value |rapid-commit ] *By default, desiredaddress/prefix assignment andrapid assignment are disabled,and the default preference is 0.Allocating different IPv6 addresses to DHCPv6clients with the same MACTraditionally, the DHCPv6 server identifies DHCPv6 clients based on their MAC addresses. EachMAC address can be bound to only one IPv6 address. However, DHCPv6 clients that have the sameMAC address exist in the network, and each client requires an IPv6 address. You can enable thisfeature to allocate different IPv6 addresses to such clients.This feature enables the DHCPv6 server to use the following methods to identify the DHCPv6 clientsthat have the same MAC address:• If a DHCPv6 snooping device or a DHCPv6 relay agent exist, you must enable the DHCPv6snooping device or the DHCPv6 relay agent to support the Interface-ID option. The DHCPv6server identifies a DHCPv6 client by the MAC address of the client and the Interface-ID optionin the DHCPv6 request.• If no DHCPv6 snooping device or DHCPv6 relay agent is on the network, the DHCPv6 serveridentifies a DHCPv6 client by the combination of the following information:{ The MAC address of the client.{ The interface name in the DHCPv6 request.{ The VLAN information of the receiving interface.To allocate different IPv6 addresses to DHCPv6 clients with the same MAC address:Step Command Remarks1. Enter system view. system-view N/A2. Enable allocation ofdifferent IPv6 addresses toDHCPv6 clients with thesame MAC address.ipv6 dhcp server multi-ip per-macenableBy default, allocation ofdifferent IPv6 addresses toDHCPv6 clients with the sameMAC address is disabled.Setting the DSCP value for DHCPv6 packets sentby the DHCPv6 serverThe DSCP value of a packet specifies the priority level of the packet and affects the transmissionpriority of the packet.
