Arp Inspection - TP-Link TL-SL5428E User Manual

Decline Flow Control:
Option 82 Config

Option 82 Support:
Existed Option 82 field:
Customization:
Circuit ID:
Remote ID:
Port Config

Port Select:
Select:
Port:
Trusted Port:
MAC Verify:
Flow Control:
Decline Protect:
LAG:

11.2 ARP Inspection

According to the ARP Implementation Procedure stated in 11.1.3 ARP Scanning, it can be found
that ARP protocol can facilitate the Hosts in the same network segment to communicate with one
another or access to external network via Gateway. However, since ARP protocol is implemented
with the premise that all the Hosts and Gateways are trusted, there are high security risks during
ARP Implementation Procedure in the actual complex network. Thus, the cheating attacks against
Select the value to specify the Decline Flow Control. The traffic
flow of the corresponding port will be limited to be this value if
the transmission rate of the Decline packets exceeds the
Decline Threshold.
Enable/Disable the Option 82 feature.
Select the operation for the Option 82 field of the DHCP request
packets from the Host.
Keep: Indicates to keep the Option 82 field of the packets.

Replace: Indicates to replace the Option 82 field of the

packets with the switch defined one.
Drop: Indicates to discard the packets including the Option

82 field.
Enable/Disable the switch to define the Option 82.
Enter the sub-option Circuit ID for the customized Option 82.
Enter the sub-option Remote ID for the customized Option 82.
Click the Select button to quick-select the corresponding port
based on the port number you entered.
Select your desired port for configuration. It is multi-optional.
Displays the port number.
Select Enable/Disable the port to be a Trusted Port. Only the
Trusted Port can receive the DHCP packets from DHCP
servers.
Select Enable/Disable the MAC Verify feature. There are two
fields of the DHCP packet containing the MAC address of the
Host. The MAC Verify feature is to compare the two fields and
discard the packet if the two fields are different.
Select Enable/Disable the Flow Control feature for the DHCP
packets. The excessive DHCP packets will be discarded.
Select Enable/Disable the Decline Protect feature.
Displays the LAG to which the port belongs to.
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