Administrator Guide

ip dhcp snooping
Enable DHCP snooping globally.
Z9000
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 9.0.2.0 Introduced on the S6000.
Version 9.2.
(0.0)
Introduced on the S4810 and S4820T.
Version 8.3.11.1 Introduced on the Z9000.
Version 8.3.1.0 Introduced on the E-Series.
Version 8.2.1.0 Introduced on the C-Series and S-Series on Layer 2
interfaces.
Version 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 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
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.
ip dhcp snooping binding
Create a static entry in the DHCP binding table.
Z-Series
Syntax
[no] ip dhcp snooping binding mac address vlan-id vlan-id ip
ip-address interface type slot/port lease number
Parameters
mac address Enter the keyword mac then the MAC address of the host to
which the server is leasing the IP address.
534
Dynamic Host Configuration Protocol (DHCP)