Concept Guide
• For a Loopback interface, enter the keyword loopback then a number from 0 to
16383.
• For a Tunnel interface, enter the keyword tunnel then the tunnel ID. The range is
from 1 to 16383.
•
For a port channel interface, enter thee keyword port-channel then a number.
The range is from 1 to 128.
• For a VLAN interface, enter the keyword vlan then a number from 1 to 4094.
Defaults Disabled
Command Modes
• CONFIGURATION
• INTERFACE
Supported Modes Full–Switch
Command History
This guide is platform-specic. For command information about other platforms, see the relevant Dell EMC
Networking OS Command Line Reference Guide.
Version Description
9.14(1.0) Introduced on the C9010, MXL, FN IOM, S3100 series, S4810, S4820T, S3048–ON,
S4048–ON, S4048T-ON, S5048F-ON, S6000, S6000–ON, S6010–ON, S6100–ON, and
Z9100–ON.
Related Commands
• ip dhcp relay source-interface— Congure DHCP relay source IP interface.
ip dhcp snooping
Enable DHCP snooping globally.
Syntax
[no] ip dhcp snooping
Defaults Disabled
Command Modes CONFIGURATION
Supported Modes Full–Switch
Command History
Version Description
9.9(0.0) Introduced on the FN IOM.
8.3.16.1 Introduced on the MXL 10/40GbE Switch IO Module.
Usage Information
When enabled, no learning takes place until you enable snooping on a VLAN. After disabling DHCP snooping, the
binding table is deleted, and Option 82, IP Source Guard, and Dynamic ARP Inspection are disabled.
Introduced in the Dell Networking OS version 7.8.1.0, DHCP snooping was available for Layer 3 only and dependent
on DHCP Relay Agent (ip helper-address). The Dell Networking OS version 8.2.1.0 extends DHCP Snooping to
Layer 2, and you do not have to enable relay agent to snoop on Layer 2 interfaces.
Dynamic Host Conguration Protocol 461