Reference Guide

366 | Dynamic Host Configuration Protocol (DHCP)
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Default
Disabled
Command History
Related
Commands
clear ip dhcp snooping
s z
Clear the DHCP binding table.
Syntax
clear ip dhcp snooping binding
Command Modes
EXEC Privilege
Default
None
Command History
Related
Commands
ip dhcp snooping
s z
Enable DHCP Snooping globally.
Syntax
[no] ip dhcp snooping
Command Modes
CONFIGURATION
Default
Disabled
Command History
Usage Information
When enabled, no learning takes place until snooping is enabled on a VLAN. Upon disabling DHCP
Snooping the binding table is deleted, and Option 82, IP Source Guard, and Dynamic ARP Inspection
are disabled.
Introduced in FTOS version 9.0.2.0, DHCP Snooping was available for Layer 3 only and dependent on
DHCP Relay Agent (ip helper-address). FTOS version 9.0.2.0 extends DHCP Snooping to Layer 2,
and you do not have to enable relay agent to snoop on Layer 2 interfaces.
Version 9.0.2.0 Introduced on then S6000.
Version 8.3.11.1 Introduced on the Z9000.
Version 8.2.1.0 Introduced on the S-Series
arp inspection Enable Dynamic ARP Inspection on a VLAN.
S6000
Version 9.0.2.0 Introduced on then S6000.
Version 8.3.11.1 Introduced on the Z9000.
Version 8.2.1.0 Introduced on the S-Series
show ip dhcp snooping Display the contents of the DHCP binding table.
S6000
Version 9.0.2.0 Introduced on then S6000.
Version 8.3.11.1 Introduced on the Z9000.
Version 8.2.1.0 Introduced on the S-Series