Planet GS-4210-24T2S User Manual

User’s Manual of GS-4210-16T2S_24T2S_16P2S_24P2S_48T4S
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4.9.3 DHCP Snooping
4.9.3.1 DHCP Snooping Overview
The addresses assigned to DHCP clients on unsecure ports can be carefully controlled using the dynamic bindings registered
with DHCP Snooping. DHCP snooping allows a switch to protect a network from rogue DHCP servers or other devices which
send port-related information to a DHCP server. This information can be useful in tracking an IP address back to a physical port.
Command Usage
• Network traffic may be disrupted when malicious DHCP messages are received from an outside source. DHCP snooping is
used to filter DHCP messages received on a non-secure interface from outside the network or firewall. When DHCP
snooping is enabled globally and enabled on a VLAN interface, DHCP messages received on an untrusted interface from
a device not listed in the DHCP snooping table will be dropped.
• Table entries are only learned for trusted interfaces. An entry is added or removed dynamically to the DHCP snooping table
when a client receives or releases an IP address from a DHCP server. Each entry includes a MAC address, IP address, lease
time, VLAN identifier, and port identifier.
• When DHCP snooping is enabled, DHCP messages entering an untrusted interface are filtered based upon dynamic entries
learned via DHCP snooping.
• Filtering rules are implemented as follows:
 If the global DHCP snooping is disabled, all DHCP packets are forwarded.

Planet GS-4210-24T2S Specifications

General

Switch type	Managed
Switch layer	L2
Quality of Service (QoS) support	Yes
SFP module slots quantity	2
Basic switching RJ-45 Ethernet ports type	Gigabit Ethernet (10/100/1000)
Basic switching RJ-45 Ethernet ports quantity	24
10G support	No
Networking standards	IEEE 802.1ab, IEEE 802.1D, IEEE 802.1p, IEEE 802.1Q, IEEE 802.1s, IEEE 802.1w, IEEE 802.1x, IEEE 802.3, IEEE 802.3ab, IEEE 802.3ad, IEEE 802.3u, IEEE 802.3x, IEEE 802.3z
Security algorithms	HTTPS, SNMP
Throughput	38.6 Mpps
Jumbo frames	9216
MAC address table	8000 entries
Supported network protocols	IPv4/IPv6 IP-based ACL / MAC-based ACL
Stackable	-
Form factor	1U
Certification	FCC Part 15 Class A, CE
Product color	Blue
LED indicators	Link, Power, System
Housing material	Metal
Input current	0.8 A
AC input voltage	100 - 240 V
AC input frequency	50 - 60 Hz
Power consumption (typical)	14 W
Heat dissipation	47 BTU/h
Storage temperature (T-T)	-10 - 70 °C
Operating temperature (T-T)	0 - 50 °C
Operating relative humidity (H-H)	5 - 95 %
Harmonized System (HS) code	85176990

Weight and Dimensions

Depth	207 mm
Width	445 mm
Height	45 mm
Weight	2100 g