D-Link DWL-8610AP User Manual

Configuring DHCP Snooping
D-Link Unified Wired and Wireless Access System
Oct. 2015 Page 257
D-Link UWS User Manual
DHCP Snooping Interface Configuration
The hardware rate limits DHCP packets sent to the CPU from untrusted interfaces to 15 packets per second.
There is no hardware rate limiting on trusted interfaces.
To prevent DHCP packets from being used as a DoS attack when DHCP snooping is enabled, the snooping
application enforces a rate limit for DHCP packets received on untrusted interfaces. DHCP snooping monitors
the receive rate on each interface separately. If the receive rate exceeds the configuration limit, DHCP
snooping brings down the interface. You must do “no shutdown” on this interface to further work with that
port. You can configure both the rate and the burst interval.
The DHCP snooping application processes incoming DHCP messages. For DHCPRELEASE and DHCPDECLINE
messages, the application compares the receive interface and VLAN with the client’s interface and VLAN in the
binding database. If the interfaces do not match, the application logs the event and drops the message. For
valid client messages, DHCP snooping compares the source MAC address to the DHCP client hardware address.
Where there is a mismatch, DHCP snooping logs and drops the packet. You can disable this feature using the
DHCP Snooping Interface Configuration page, shown in Figure 157 below, or by using the
no ip dhcp snooping
verify mac-address
command. DHCP snooping forwards valid client messages on trusted members within the
VLAN. If DHCP relay and/or DHCP server co-exist with the DHCP snooping, the DHCP client message will be sent
to the DHCP relay and/or DHCP server to process further.
To access the DHCP Snooping Interface Configuration page, click LAN > L2 Features > DHCP Snooping >
Interface Configuration in the navigation tree.
Figure 157: DHCP Snooping Interface Configuration
Table 140: DHCP Snooping Interface Configuration
Field Description
Interface Select the interface for which data is to be displayed or configured.
Trust State If it is enabled, the DHCP snooping application considers the port as trusted.
The default is Disable.
Logging Invalid Packets If it is enabled, the DHCP snooping application logs invalid packets on this
interface. The default is Disable.

D-Link DWL-8610AP Specifications

General

2.4 GHz	Yes
Modulation	-
Frequency band	2.4 - 2.497, 4.9 - 5.85 GHz
Number of users	- user(s)
Channels quantity	- channels
Networking standards	IEEE 802.11a, IEEE 802.11ac, IEEE 802.11b, IEEE 802.11g, IEEE 802.11n, IEEE 802.3, IEEE 802.3ab, IEEE 802.3at, IEEE 802.3u, IEEE 802.3x
Wi-Fi data rate (max)	1750 Mbit/s
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Maximum data transfer rate	1000 Mbit/s
Flash memory	64 MB
Internal memory	512 MB
Internal	No
Certification	CE, FCC, IC
Product color	Gray
Ethernet LAN (RJ-45) ports	2
Antennas quantity	6
Antenna gain level (max)	6.5 dBi
Power supply type	PoE, DC
Power consumption (typical)	14 W
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	10 - 90 %
Package depth	265 mm
Package width	238 mm
Package height	112 mm
Package weight	1160 g
Pallet width	1200 mm
Pallet length	1100 mm
Pallet height (air)	1955 mm
Pallet gross weight (air)	385580 g
Quantity per pallet (air)	210 pc(s)
Shipping (inner) case width	280 mm
Shipping (inner) case height	260 mm
Shipping (inner) case length	585 mm
Shipping (inner) case weight	8740 g
Shipping (inner) case net weight	5800 g
Number of cartons per pallet (air)	42 pc(s)
Quantity per shipping (inner) case	5 pc(s)

Weight and Dimensions

Depth	171 mm
Width	198 mm
Height	40 mm
Weight	240 g