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TRENDnet User’s Guide
TL2-FG142
15
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4.3.4 DHCP
DHCP Snooping is used to block intruder on the untrusted ports of the switch device
when it tries to intervene by injecting a bogus DHCP reply packet to a legitimate
conversation between the DHCP client and server.
4.3.4.1 Server-Mode
This page configures global mode and VLAN mode to enable/disable DHCP server per
system and per VLAN.
Global Mode
Configure operation mode to enable/disable DHCP server per system.
Items
Description
Mode
Configure the operation mode per system. Possible modes are:
Enabled: Enable DHCP server per system.
Disabled: Disable DHCP server pre system.
VLAN Mode
Configure operation mode to enable/disable DHCP server per VLAN.
Items
Description
VLAN Range Indicate the VLAN range in which DHCP server is enabled or disabled.
The first VLAN ID must be smaller than or equal to the second VLAN ID.
BUT, if the VLAN range contains only 1 VLAN ID, then you can just input
it into either one of the first and second VLAN ID or both.
On the other hand, if you want to disable existed VLAN range, then you
can follow the steps.
1. press Add VLAN Range to add a new VLAN range.
2. input the VLAN range that you want to disable.
3. choose Mode to be Disabled.
4. press Save to apply the change.
Then, you will see the disabled VLAN range is removed from the DHCP
Server mode configuration page.
Mode
Indicate the the operation mode per VLAN. Possible modes are:
Enabled: Enable DHCP server per VLAN.
Disabled: Disable DHCP server pre VLAN.
4.3.4.2 Server-Excluded IP
This page configures excluded IP addresses. DHCP server will not allocate these
excluded IP addresses to DHCP client.
Items
Description
IP Range
Define the IP range to be excluded IP addresses. The first excluded IP
must be smaller than or equal to the second excluded IP. BUT, if the IP
range contains only 1 excluded IP, then you can just input it to either
one of the first and second excluded IP or both.
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