Niveo Professional NGS16TP - Manual (Page 120)

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NIVEO PROFESSIONAL Gigabit Management Switch
User's Manual
6.4.11 DHCP Relay Agent Option 82
DHCP Relay function will control DHCP requests and forward DHCP requests to the
assigned DHCP server. DHCP Relay Agent Option 82 function will add connection port,
VLAN ID and switch information to DHCP requests and then send to the specified DHCP
server. Based on those information, DHCP server will assign an IP configuration in the
DHCP reply. This is a security function.
This page is used to configure DHCP Relay Option 82 function. DHCP Relay Option 82
function will add the following information to DHCP request packet ...
1. Port number that DHCP request packet comes from
2. VLAN ID for this DHCP request
3. Mac address of the switch
4. A additional string as information. (*Adding the information string must be enabled
first.)
And DHCP server will assign IP configuration according to the information in Option 82.
Note: Not every DHCP server supports Option 82 function. If DHCP server does not
support it, please disable this DHCP-Relay Agent Option 82 function.
Here is the Option 82 definition of the switch.
1. Circuit ID sub-option setup information for DHCP server :
<Format>
[Slot ID/1-Byte] [Port ID/1-Byte] [VLAN ID/2-Bytes] [Information/X- Bytes]
Slot ID - plase set to “0”.
Port ID - please set according to the port number of the switch.
VLAN ID - please set according to its VLAN ID.
Information - this is a string with variable length
For example, “000500c8” means Slot ID 0, Port 5, VLAN ID 200, no information. All of
the numbers are hexadecimal numbers.
2. Remote ID sub-option setup information for DHCP server :
<Format>
[Mac Address/6-Bytes]