User's Manual

32-14
32.3 DHCPv6 option37, 38 Examples
32.3.1 DHCPv6 Snooping option37, 38 Example
Figure 32-1 DHCPv6 Snooping option schematic
As is shown in the figure above, Mac-AA, Mac-BB and Mac-CC are normal users, connected to entrusted
interface 1/2, 1/3 and 1/4 respectively, and they get IP 2010:2, 2010:3 and 2010:4 through DHCPv6 Client;
DHCPv6 Server is connected to the trusted interface 1/1. Configure three address assignment policies
(CLASS), of which CLASS1 matches option 38, CLASS2 matches option 37 and CLASS3 matches option 37
and option 38. In the address pool EastDormPool, the requests matched with CLASS1, CLASS2 and
CLASS3 will be assigned an address ranging from 2001:da8:100:1::2 to 2001:da8:100:1::30, from
2001:da8:100:1::31 to 2001:da8:100:1::60 and from 2001:da8:100:1::61 to2001:da8:100:1::100 respectively;
DHCPv6 snooping function is enabled and option 37 and option 38 are configured in Switch A.
Switch A configuration:
SwitchA(config)#ipv6 dhcp snooping remote-id option
SwitchA(config)#ipv6 dhcp snooping subscriber-id option
SwitchA(config)#int e 1/0/1
SwitchA(config-if-ethernet1/0/1)#ipv6 dhcp snooping trust
SwitchA(config-if-ethernet1/0/1)#exit
SwitchA(config)#interface vlan 1
SwitchA(config-if-vlan1)#ipv6 address 2001:da8:100:1::1
SwitchA(config-if-vlan1)#exit
SwitchA(config)#interface ethernet 1/0/1-4
SwitchA(config-if-port-range)#switchport access vlan 1
SwitchA(config-if-port-range)#exit
SwitchA(config)#