Industrial Managed
Ethernet Switch
User Manual
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The users can also have a choice to enable DHCP
’s
Option 82
which is the DHCP Relay Agent Information Option
.
When this Option 82 is enabled, the switch will insert information about the client
’
s network location into the packet
header of DHCP request coming from the client on an untrusted interface
.
Then, the switch will send the modified
request to the DHCP server
.
The DHCP server will inspect the option 82 information in the packet header and use
it to generate the IP address or other parameters for the client
.
When the DHCP server returns the response to the
switch, the switch will remove the option 82 information from the response packet and forward it to the client
.
The
Option 82 Type field in Figure 2.175 can be chosen from
IP
,
MAC
,
Client-ID
, or
Other
in the dropdown list
.
When
Other
type is selected, the
Option 82 Value
field will become active for entering the desired value by the users
.
After finishing the DHCP Relay Agent setup, please click on the
Update
button to allow the change to take effect.
Figure 2.175 DHCP Relay Agent Webpage
2.19.2 DHCP Mapping IP
The user can reserve or map IP addresses to the device connected on the selected ports in this submenu
2.176 shows the DHCP Mapping IP webpage where the desired IP address can be entered into the field for each
Port
.
After finishing the DHCP IP mapping to the port(s), please click on the
Update
button to allow the change to
take effect.
Figure 2.176 DHCP Mapping IP Webpage