Maipu Administration Guide

Configure DHCPv6 Relay

Network Requirements

Device1 is the DHCPv6 server, and the interface of Device2 enables the DHCPv6 relay function.
The DHCPv6 server provides the service for the client of the segment 1::/64, and the first ten IPv6 addresses are reserved.
The DHCPv6 client gets the IPv6 address via DHCPv6 relay.

Network Topology

Networking for Configuring a DHCPv6 Relay

Figure 6-3 Networking for Configuring a DHCPv6 Relay

Configuration Steps

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

Step 2: Configure an IPv6 address pool for Device 1, and configure the reserved IPv6 addresses.

#Configure Device1 as DHCPv6 server.

Device1#configure terminal
Device1(config)#interface vlan3
Device2(config-if-vlan3)#ipv6 dhcp server
Device2(config-if-vlan3)#exit

#Configure IPv6 addresses which are from 1::0 to 1::9 not to be allocated.

Device1(config)#ipv6 dhcp excluded-address 1::0 1::9

#Configure IPv6 address pool dynamic-pool for Device1.

Device1(config)#ipv6 dhcp pool dynamic-pool
Device1(dhcp6-config)#network 1::/64
Device1(dhcp6-config)#lease preferred-lifetime 300 valid-lifetime 600
Device1(dhcp6-config)#exit

#Configure a static route to network segment 1::/64.

Device1(config)#ipv6 route 1::0/64 2::2

Step 3: On the interface vlan2 of Device2, enable the DHCPv6 relay and configure the address of the DHCPv6 server 2::1.

Device2(config)#interface vlan2
Device2(config-if-vlan2)#ipv6 dhcp relay
Device2(config-if-vlan2)#ipv6 dhcp relay server-address 2::1
Device2(config-if-vlan2)#exit

Step 4: Check the result.

#On Device1, query the IPv6 addresses that have been allocated.

Device1#show ipv6 dhcp pool dynamic-pool lease  
IPv6 Address                 Duid                        Iaid        Type     Time Left(s)
-------------    ------------------------------------    --------    -----    ------------ 
1::0             000200001613303030313761636635646634    00000000    Lease    574

Use the show ipv6 dhcp pool dynamic-pool lease command to query the IPv6 addresses that have been allocated to clients. The result shows that a client has obtained the IPv6 address 1::0.