Service Manual

Command Modes EXEC Privilege
Command History
Version Description
9.9(0.0) Introduced on the FN IOM
Example
Dell# clear ipv6 dhcp snooping?
binding Clear the snooping binding database
ip dhcp snooping
Enable DHCP snooping globally.
Syntax
[no] ip dhcp snooping
Defaults Disabled
Command Modes CONFIGURATION
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.
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
Version Description
9.9(0.0) Introduced on the FN IOM.
9.7(0.0) Introduced on the MXL.
436 Dynamic Host Configuration Protocol (DHCP)