Dell Command Line Reference Guide for the S4048–ON System 9.14.2.4

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ip dhcp snooping

Enable DHCP snooping globally.

Syntax
[no] ip dhcp snooping
Defaults
Disabled
Command Modes
CONFIGURATION
Command History

This guide is platform-specific. For command information about other platforms, see the relevant Dell EMC Networking OS Command Line Reference Guide.

Version
Description
9.10(0.1)
Introduced on the S6010-ON and S4048T-ON.
9.10(0.0)
Introduced on the S3148.
9.10(0.0)
Introduced on the S6100-ON.
9.8(2.0)
Introduced on the S3100 series.
9.8(1.0)
Introduced on the Z9100–ON.
9.8(0.0P5)
Introduced on the S4048-ON.
9.8(0.0P2)
Introduced on the S3048-ON.
9.7(0.0)
Introduced on the S6000-ON.
9.2(1.0)
Introduced on the Z9500.
9.2.(0.0)
Introduced on the S4810 and S4820T.
9.0.2.0
Introduced on the S6000.
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.

Introduced in Dell EMC Networking OS version 7.8.1.0, DHCP snooping was available for Layer 3 only and dependent on DHCP Relay Agent (ip helper-address). Dell EMC Networking OS version 8.2.1.0 extends DHCP Snooping to Layer 2. You do not have to enable relay agent to snoop on Layer 2 interfaces.


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