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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 to the server.
The no operation of this command sets the reforward policy of DHCPv6 packets with
option 38 as replace.
Parameters: None.
Default: Using replace mode to replace option 38 of current packets with system‘s own.
Command Mode: Global configuration mode
Usage Guide: Since DHCPv6 client packets may already include option 38 information,
corresponding processing policy of DHCPv6 SNOOPING is requested to develop. If the
reforward policy is set as replace, option 38 has to be enabled in advance. The system
disables option 38 of DHCPv6 SNOOPING by default.
Example: Set the reforward policy of DHCPv6 packets with option 38 as keep for
DHCPv6 SNOOPING.
Switch(Config)# ipv6 dhcp snooping subscriber-id policy keep
18.1.18 ipv6 dhcp snooping subscriber-id select
delimiter
Command: ipv6 dhcp snooping subscriber-id select (sp | sv | pv | spv) delimiter
WORD (delimiter WORD | )
no ipv6 dhcp snooping subscriber-id select delimiter
Function: Configure user configuration options to generate subscriber-id. The no form of
this command restores to its original default configuration, i.e. vlan name together with
port name.
Parameters: (sp | sv | pv | spv), a selection from combinations of slot, port and vlan,
among which sp represents slot and port, sv represents slot and vlan, pv represents port
and vlan, and spv represents slot, port and vlan.
WORD, the delimiter between slot, port and vlan which ranges among
(#|.|,|;|:|/|space). Note that there're two delimiter WORDs here, of which the former is the
delimiter between slot and port while the latter is that between port and vlan.
Default: Null.
Command Mode: Global configuration mode
Usage Guide: This command has no effect on ports with self-defined subscriber-id. If a
user redefines subscriber-id of the port after configuring the command, the user-defined