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<circuit-id>}
no ip dhcp snooping information option subscriber-id
Function: Set the suboption1 (circuit ID option) content of option 82 added by DHCP
request packets (they are received by the port). The no command sets the additive
suboption1 (circuit ID option) format of option 82 as standard.
Parameters: standard means the standard format of VLAN name and physical port name,
such as Vlan2+Ethernet1/12. <circuit-id> means the circuit-id content of option 82
specified by users, its length can not exceed 64 characters.
Command Mode: Port Mode
Default: Use standard format to set circuit-id.
Usage Guide: The additive option 82 needs to associate with third-party DHCP server, it
is used to specify the circuit-id content by user when the standard circuit-id format can not
satisfy server‘s request.
Example: Set the suboption circuit-id of DHCP option82 as P2.
Switch(config)#ip dhcp snooping information option subscriber-id P2
19.25 ip dhcp snooping information option
subscriber-id format
Command: ip dhcp snooping information option subscriber-id format {hex | acsii |
vs-hp}
Function: This command is used to set subscriber-id format of DHCP snooping option82.
Parameters: hex means that subscriber-id is VLAN and port information with
hexadecimal format, acsii means that subscriber-id is VLAN and port information with
ACSII format. vs-hp means that subscriber-id is compatible with the format of HP
manufacturer.
Command Mode: Global mode
Default: ascii.
User Guide: VLAN and port information with ASCII format, such as Vlan1+Ethernet1/11,
VLAN and port information with hexadecimal format defined as below:
1 8 0 6 VLAN Slot Module Port
1 byte 1 byte 1 byte 1 byte 2 byte 1 byte 1 byte 2 byte
Suboption
type
Length
Circuit
ID type
Length