Dell PowerConnect 3524 User Manual

DHCP Snooping 155
Example
The following example configures Ethernet port 1/e15 as trusted for DHCP snooping purposes.
ip dhcp snooping information option allowed-untrusted
The ip dhcp snooping information option allowed-untrusted Global Configuration mode command
configures a switch to accept DHCP packets with option-82 information from an untrusted port. Use the
no form of this command to configure the switch to drop these packets from an untrusted port.
Syntax
• ip dhcp snooping information option allowed-untrusted
• no ip dhcp snooping information option allowed-untrusted
Default Configuration
The default configuration is to discard DHCP packets with option-82 information from an untrusted
port.
Command Mode
Global Configuration mode.
User Guidelines
There are no user guidelines for this command.
Example
The following example configures a switch to accept DHCP packets with option-82 information from an
untrusted port:.
ip dhcp snooping verify
The ip dhcp snooping verify Global Configuration mode command configures a switch to verify on an
untrusted port that the source MAC address in a DHCP packet matches the client hardware address.
Use the no form of this command to not verify the MAC addresses.
console(config)# interface ethernet 1/e15
console(config-if)# ip dhcp snooping trust
console(config)#ip dhcp snooping information option allowed-
untrusted
book.book Page 155 Thursday, December 18, 2008 7:40 PM

Dell PowerConnect 3524 Specifications

General

Throughput	9.5 Mpps
Number of queues	4
MAC address table	8000 entries
Maximum data transfer rate	0.1 Gbit/s
Supported data transfer rates	10/100 Mbps
10G support	No
Number of VLANs	256
Flow control support	Yes
Networking standards	IEEE 802.1D, IEEE 802.1p, IEEE 802.1Q, IEEE 802.1s, IEEE 802.1w, IEEE 802.3ad
Input frequency	50/60 Hz
Weight (imperial)	11 lbs
Dimensions (WxDxH)	440 x 257 x 43.2 mm
Networking features	Gigabit Ethernet, Fast Ethernet
Authentication method	RADIUS, TACACS+
Connectivity technology	Wired
Dimensions (W x D x H) (imperial)	17.3 x 10.12 x 1.7 \
Switch type	Managed
Switch layer	L2
Data link protocols	Ethernet
Supported network protocols	HTTP, HTTPS/SSL, SSH
Power connector	DC-in jack
Gigabit Ethernet (copper) ports quantity	2
Basic switching RJ-45 Ethernet ports quantity	24
Product color	Black
Power source	AC
Input voltage	100 - 240 V
Storage temperature (T-T)	-20 - 70 °C
Operating temperature (T-T)	0 - 45 °C
Storage relative humidity (H-H)	10 - 95 %
Operating relative humidity (H-H)	10 - 90 %

Weight and Dimensions

Weight	5000 g