TP-Link T2600G Series User Manual

User Guide 912
Configuring DHCP Filter DHCP Filter
1
DHCP Filter
1.1 Overview
During the working process of DHCP, generally there is no authentication mechanism
between the DHCP server and the clients. If there are several DHCP servers on the
network, security problems and network interference will happen. DHCP Filter resolves this
problem.
With DHCP Filter configured, the switch can check whether the received DHCP packets
are legal and discard the illegal ones. In this way, DHCP Filter ensures that users get IP
addresses only from the legal DHCP server and enhances the network security.
As the following figure shows, there are both legal and illegal DHCP servers on the network.
You can configure DHCP Server1 as a legal DHCP server by providing the IP address and
port number of DHCP Server1. When receiving the DHCP respond packets, the switch will
forward the packets from the legal DHCP server.
Figure 1-1 Network Topology
Switch
Other DHCP Server
(Illegal)
Clients
DHCP Server1
(Legal)
Additionally, you can limit the forwarding rate of DHCP packets on each port.
1.2 Supported Features
The switch supports DHCPv4 Filter and DHCPv6 Filter.

TP-Link T2600G Series Specifications

General

Model	T2600G Series
Layer	Layer 2+
Type	Managed
Uplink Ports	4 x Gigabit SFP slots
VLAN	4K VLANs
QoS	8 priority queues
Management	Web-based GUI, CLI, SNMP, RMON
Standards and Protocols	IEEE 802.3i, IEEE 802.3u, IEEE 802.3ab, IEEE 802.3z, IEEE 802.3ad, IEEE 802.3x, IEEE 802.1d, IEEE 802.1s, IEEE 802.1w, IEEE 802.1q, IEEE 802.1p, IEEE 802.3af, IEEE 802.3at
Interface	RJ45
L2 Features	STP, RSTP, MSTP, LACP, IGMP Snooping
L3 Features	Static Routing
Security	802.1X, Port Security, DHCP Snooping, IP Source Guard, DoS Defend, ARP Inspection, SSH, SSL, ACL
MAC Address Table	16K
Jumbo Frame	9KB
Operating Temperature	0°C to 40°C
Storage Temperature	-40°C to 70°C
Operating Humidity	10% to 90% RH non-condensing
Storage Humidity	5% to 90% non-condensing