Maipu Administration Guide

Configure a DHCPv6 Server to Dynamically Allocate IPv6 Addresses

Network Requirements

Two interface VLANs of Device, VLAN2 and VLAN3, are respectively configured with IPv6 addresses 1::3/64 and 2::3/64.
The DHCPv6 server Device dynamically allocates IPv6 addresses 1::/64 and 2::/64 to the two clients in the directly-connected physical network.
The addresses in network segment 1::/64 have a one-day lease, the DNS server address is 2::4. The addresses in network segment 2::/64 have a three-day lease the gateway address is 2::3, the DNS server address is 2::4.
The first 10 IPv6 addresses in network segments 1::/64 and 2::/64 are reserved and cannot be allocated.

Network Topology

Configuring a DHCPv6 Server to dynamically Allocate IPv6 Addresses

Figure 6-2 Configuring a DHCPv6 Server to dynamically Allocate IPv6 Addresses

Configuration Steps

Step 1: Create VLANs, and add ports to the required VLANs. Configure the IPv6 address of the interface (omitted).

Step 2: On the DHCPv6 server Device1, configure two dynamic address pools and their parameters.

#Configure the DHCPv6 server.

Device(config)#interface vlan2
Device(config-if-vlan2)#ipv6 dhcp server
Device(config-if-vlan2)#exit
Device(config)#interface vlan3
Device(config-if-vlan3)#ipv6 dhcp server
Device(config-if-vlan3)#exit

#Configure the first 10 IP addresses in the two address pools to be reserved.

Device(config)#ipv6 dhcp excluded-address 1::0 1::9
Device(config)#ipv6 dhcp excluded-address 2::0 2::9

#Configure address pool dynamic-pool1 and its parameters (including address range, DNS address, address lease).

Device(config)#ipv6 dhcp pool dynamic-pool1
Device(dhcp6-config)#network 1::/64
Device(dhcp6-config)#dns-server 2::4
Device(dhcp6-config)#lease preferred-lifetime 86300 valid-lifetime 86400
Device(dhcp6-config)#exit

#Configure address pool dynamic-pool2 and its parameters (including address range, DNS address, address lease).

Device(config)#ip DHCPv6 pool dynamic-pool2
Device(dhcp6-config)#network 2::/64
Device(dhcp6-config)#dns-server 2::4
Device(dhcp6-config)#lease preferred-lifetime 259100 valid-lifetime 259200
Device(dhcp6-config)#exit

Step 3: Check the result.

#On Device, query the IPv6 addresses that are allocated to clients.

Device#show ipv6 dhcp pool dynamic-pool1 lease  
IPv6 Address                 Duid                       Iaid       Type         Time Left(s)
-------------    ------------------------------------   --------   ------       ------------ 
1::a             000200001613303030313761636635646634   00000000   Lease        86390
Device2#show ipv6 dhcp pool dynamic-pool2 lease  
IPv6 Address                 Duid                       Iaid       Type         Time Left(s)
-------------    ------------------------------------   --------   ------       ------------ 
2::a             000200001613303030313761636635646634   00000000   Lease        2591974

On the DHCPv6 clients, query whether the IPv6 addresses have been obtained properly.

caution

The IPv6 addresses in the address pool must be within the network segment range of the interface that provides the service.