Qtech QSW-8200-28T-AC — dHCPv6 Commands: Managing Subscriber-ID and Options [53/79]

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User Manual

Chapter 4. Commands for DHCPv6 option37, 38 53

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 no ipv6 dhcp snooping subscriber-id

 Function: This command is used to set the form of adding option 38 in received DHCPv6

request packets, of which <subscriber-id> is the content of subscriber-id in user-defined

option 38 and it is a string with a length of less than 128. The no operation of this

command restores subscriber-id in option 38 to vlan name together with port name

such as "Vlan2+Ethernet1/0/2".

 Parameters: subscriber-id, user-defined content of option 38

 Default: Set subscriber-id in option 38 to vlan name together with port name.

 Command Mode: Port mode

 Usage Guide: Because option 38 information added by switch may associate with third-

party DHCPv6 servers, users can specify subscriber-id content based on server

condition when standard subscriber-id of the switch cannot satisfy the demand of

server. The vlan name together with physical port name is used as subscriber-id in

option 38 by default.

 Example: Enable abc as subscriber-id of DHCPv6 option 38.

 Switch(Config-if-Ethernet1/0/1)#ipv6 dhcp snooping subscriber-id abc

4.1.16 ipv6 dhcp snooping subscriber-id option

 Command: ipv6 dhcp snooping subscriber-id option

 no ipv6 dhcp snooping subscriber-id option

 Function: This command enables DHCPv6 SNOOPING to support option 38, the no form

of this command disables it.

 Parameters: None.

 Default: Disable option 38 of DHCPv6 SNOOPING.

 Command Mode: Global configuration mode

 Usage Guide: Only after this command is configured, DHCPv6 SNOOPING can add

option 38 in DHCPv6 packets before sending it to server or relay agent. Make sure that

DHCPv6 SNOOPING has been enabled before executing this command. The system

disables option 38 of DHCPv6 SNOOPING by default.

 Example: Enable option 38 in DHCPv6 SNOOPING.

 Switch(Config)#ipv6 dhcp snooping enable

 Switch(Config)#ipv6 dhcp snooping subscriber-id option

4.1.17 ipv6 dhcp snooping subscriber-id policy

 Command: ipv6 dhcp snooping subscriber-id policy {drop | keep | replace}

 no ipv6 dhcp snooping subscriber-id policy

 Function: This command is used to set the reforward policy of the system when

receiving DHCPv6 packets with option 38, among which the drop mode means that the

system simply discards it with option 38, keep mode means that the system keeps

option 38 unchanged and forwards the packets to the server and replace mode means

that the system replaces option 38 of current packets with its own before forwarding it