Reference Guide

Example
Dell# clear ipv6 dhcp snooping?
binding Clear the snooping binding database
ip dhcp snooping
Enable DHCP snooping globally.
Z9500
Syntax
[no] ip dhcp snooping
Defaults Disabled
Command Modes CONFIGURATION
Command
History
This guide is platform-specific. For command information about other platforms, refer to the relevant Dell
Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.2(1.0) Introduced on the Z9500.
9.2.(0.0) Introduced on the S4810 and S4820T.
8.3.11.1 Introduced on the Z9000.
8.3.1.0 Introduced on the E-Series.
8.2.1.0 Introduced on the C-Series and S-Series on Layer 2 interfaces.
7.8.1.0 Introduced on the C-Series and S-Series on Layer 3 interfaces.
Usage
Information
When enabled, no learning takes place until you enable snooping on a VLAN. After disabling DHCP
snooping, the binding table deletes and Option 82, IP Source Guard, and Dynamic ARP Inspection are
disabled.
DHCP snooping supports Layer 3 using DHCP Relay Agent (ip helper-address) and Layer 2. You do
not have to enable relay agent to snoop on Layer 2 interfaces.
Related
Commands
ip dhcp snooping vlan — enables DHCP snooping on one or more VLANs.
ipv6 dhcp snooping
Enable DHCPv6 snooping globally for ipv6.
Syntax
[no] ipv6 dhcp snooping
To disable the snooping globally, use the no ipv6 dhcp snooping command.
Defaults Disabled
Command Modes CONFIGURATION
Command
History
This guide is platform-specific. For command information about other platforms, refer to the relevant Dell
Networking OS Command Line Reference Guide.
The following is a list of the Dell Networking OS version history for this command.
Version Description
9.7(0.0) Introduced on the S4810, S4820T, S6000 and Z-Series.
Dynamic Host Configuration Protocol (DHCP) 539