Manual

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Москва, Новозаводская ул., 18, стр. 1
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33.3 DHCPv6 option37, 38 Examples
33.3.1 DHCPv6 Snooping option37, 38 Example
DHCPv6 Snooping option schematic
As is shown in the figure above, Mac-AA, Mac-BB and Mac-CC are normal users, connected
to untrusted 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 1/1
SwitchA(config-if-ethernet1/1)#ipv6 dhcp snooping trust
SwitchA(config-if-ethernet1/1)#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 1/1-4
Interface E1/1
MAC-CC
MAC-BB
MAC-AA
Switch B
Switch A
Interface E1/4
Interface E1/3
Interface
E1/2