DGS-3630 Series Layer 3 Stackable Managed Switch Web UI Reference Guide
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Parameter Description
State
Select to enable or disable the DHCPv6 local relay feature on the specified
VLAN(s) here.
Click the Apply button to accept the changes made.
NOTE: When the state of the DHCPv6 relay port is disabled, the port will not relay or locally relay
received DHCPv6 packets.
DHCP Auto Configuration
This window is used to display and configure the DHCP auto-configuration function.
To view the following window, click Management > DHCP Auto Configuration, as shown below:
Figure 4-64 DHCP Auto Configuration Window
The fields that can be configured are described below:
Parameter Description
Auto Configuration State
Select this option to enable or disable the auto-configuration function.
Click the Apply button to accept the changes made.
DHCP Auto Image Settings
This window is used to display and configure the DHCP auto-image settings. During the start-up time of a Switch, this
function provides the capability of obtaining the image file form an external TFTP server whose IP address and file
name is carried in the DHCP OFFER message received from the DHCP server. The system then uses this image file
as the boot-up image. When the system boots up and the auto-image function is enabled, the Switch becomes a
DHCP client automatically.
The DHCP client will be activated to get the network settings from the DHCP server and the DHCP server includes the
TFTP server IP address and image filename with the message. The Switch then receives this information and triggers
the TFTP downloading function from the specified TFTP server. At this stage, the system will display the download
configuration parameters on the console. The layout is the same as using the download firmware command. After
the firmware download was completed, the Switch will then reboot immediately.
If both the auto-configuration and auto-image features are enabled at the same time, system will download the image
file first and then download the configuration. After this, the Switch will then save the configuration and reboot.
The Switch will always check the downloaded firmware. If the version is the same as the current running firmware, the
Switch will terminate the auto-image process. The downloaded configuration, however, will still be executed if the
auto-configuration feature is also enabled.
This function is similar to the auto-configuration function. Both the image file and the configuration file must be placed
on the same TFTP server, as the DHCP option fields are not only used in the auto-image feature, but also in the auto-
configuration feature. The TFTP server IP address is still placed in the DHCP siaddr fields Option 66 or Option 150. If
Option 66, Option 150 and the siaddr fields exist in the DHCP response message at the same time, the Option 150
will be resolved first. If the system fails to connect to the TFTP server, then the system will resolve the Option 66, and
if the system still fails to connect the TFTP server, the siaddr field is the last choice.
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