H3C Technologies H3C S7500E Series Switches - Manual (Page 155)

14-8
With this command executed, if VLAN-interface 2 has no IP address configured, Switch A will
automatically generate a link-local address, and send an RS message, requesting the gateway (Switch
B) to reply with an RA message immediately.
Verification
After receiving an RA message with the “M” flag set to 0 and with the “O” flag set to 1, Switch A
automatically enables the stateless DHCPv6 function.
# You can use the display ipv6 dhcp client command to view the current client configuration
information. If the client successfully obtains configuration information from the server, the following
information will be displayed.
[SwitchA-Vlan-interface2] display ipv6 dhcp client interface vlan-interface 2
Vlan-interface2 is in stateless DHCPv6 client mode
State is OPEN
Preferred Server:
Reachable via address : FE80::213:7FFF:FEF6:C818
DUID : 0003000100137ff6c818
DNS servers : 1:2:3::5
1:2:4::7
Domain names : abc.com
Sysname.com
# You can use the display ipv6 dhcp client statistics command to view the current client statistics.
[SwitchA-Vlan-interface2] display ipv6 dhcp client statistics
Interface : Vlan-interface2
Packets Received : 1
Reply : 1
Advertise : 0
Reconfigure : 0
Invalid : 0
Packets Sent : 5
Solicit : 0
Request : 0
Confirm : 0
Renew : 0
Rebind : 0
Information-request : 5
Release : 0
Decline : 0
DHCPv6 Relay Agent Configuration Example
Network requirements
As shown in Figure 14-6 , the network address prefix of DHCPv6 clients is 1::/64, and the IPv6 address
of the DHCPv6 server is 2::2/64. The DHCPv6 client and server need to communicate via a DHCPv6
relay agent (Switch A).
Switch A acts as the gateway of network 1::/64. It sends RA messages to notify the hosts to obtain IPv6
addresses and other configuration parameters through DHCPv6.