Qtech QSW-8200-28T-POEAC- DC [43/79] Ip dhcp relay information option subscriber id

User Manual

Chapter 3. Commands for DHCP Option 82 43

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3.9 ip dhcp relay information option self-defined subscriber-id format

 Command: ip dhcp relay information option self-defined subscriber-id format [ascii |

hex]

 Function: Set self-defined format of circuit-id for relay option82.

 Parameters: None.

 Command Mode: Global Mode

 Default: ascii.

 Usage Guide: self-defined format use ip dhcp relay information option type self-defined

subscriber-id to create circuit-id format.

 Example: Set self-defined format of circuit-id as hex for relay option82.

 Switch(config)# ip dhcp relay information option self-defined subscriber-id format hex

3.10 ip dhcp relay information option subscriber-id

 Command: ip dhcp relay information option subscriber-id {standard | <circuit-id>}

 no ip dhcp relay information option subscriber-id

 Function: This command is used to set the format of option82 sub-option1(Circuit ID

option) added to the DHCP request messages from interface, standard means the

standard vlan name and physical port name format, like “Vlan2+Ethernet1/0/12”,

<circuit-id> is the circuit-id contents of option82 specified by users, which is a string no

longer than 64 characters. The “no ip dhcp relay information option subscriber-id”

command will set the format of added option82 sub-option1 (Circuit ID option) as

standard format.

 Parameters: None

 Command Mode: Interface configuration mode.

 Default Settings: The system uses the standard format to set the circuit-id of option 82

by default.

 User Guide: Because the option 82 information added for the switch should cooperate

with the third party DHCP server, if the standard circuit-id format of the switch cannot

satisfy the server’s request, this method will be provided for users to specify the

contents of circuit-id according to the situation of the server.

 Example: Set the sub-option circuit-id of DHCP option82 as foobar.

 Switch(config-if-vlan1)#ip dhcp relay information option subscriber-id foobar

3.11 ip dhcp relay information option subscriber-id format

 Command: ip dhcp relay information option subscriber-id format {hex | acsii | vs-hp}

 Function: Set subscriber-id format of Relay Agent 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