Cisco Catalyst 3750 User Manual

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Catalyst 3750 Switch Command Reference
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Chapter 2 Catalyst 3750 Switch Cisco IOS Commands
ip dhcp snooping
ip dhcp snooping
Use the ip dhcp snooping global configuration command to globally enable DHCP snooping. Use the
no form of this command to return to the default setting.
ip dhcp snooping
no ip dhcp snooping
Syntax Description This command has no arguments or keywords.
Defaults DHCP snooping is disabled.
Command Modes Global configuration
Command History
Usage Guidelines For any DHCP snooping configuration to take effect, you must globally enable DHCP snooping.
DHCP snooping is not active until you enable snooping on a VLAN by using the ip dhcp snooping vlan
vlan-id global configuration command.
Examples This example shows how to enable DHCP snooping:
Switch(config)# ip dhcp snooping
You can verify your settings by entering the show ip dhcp snooping user EXEC command.
Related Commands
Release Modification
12.1(19)EA1 This command was introduced.
Command Description
ip dhcp snooping vlan Enables DHCP snooping on a VLAN.
show ip igmp snooping Displays the DHCP snooping configuration.
show ip dhcp snooping binding Displays the DHCP snooping binding information.

Cisco Catalyst 3750 Specifications

General

Device Type	Switch
Switching Capacity	32 Gbps
Forwarding Rate	38.7 Mpps
Stacking Bandwidth	32 Gbps
RAM	128 MB
Jumbo Frame Support	Yes
Switch Type	Managed
Model	Catalyst 3750 Series
Uplink Interfaces	SFP
Form Factor	Rack-mountable
MAC Address Table Size	12, 000 entries
Routing Protocol	RIP, OSPF, EIGRP
Remote Management Protocol	SNMP, Telnet, HTTP
Features	Layer 3 switching, Layer 2 switching, auto-negotiation, BOOTP support, ARP support, VLAN support, auto-uplink (auto MDI/MDI-X), IGMP snooping, traffic shaping, MAC address filtering, Quality of Service (QoS), Jumbo Frames support, MLD snooping, Dynamic ARP Inspection (DAI), Cisco EnergyWise technology
Power over Ethernet (PoE)	PoE
Operating Temperature	-5 - 45 °C
Operating Humidity	10% to 85% non-condensing