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.
ip dhcp snooping database
Delay writing the binding table for a specified time.
Syntax
ip dhcp snooping database write-delay minutes
Parameters
minutes The range is from 5 to 21600.
Defaults none
Command
Modes
CONFIGURATION
Command
History
Version 8.3.16.1 Introduced on the MXL 10/40GbE Switch IO Module.
ip dhcp snooping binding
Create a static entry in the DHCP binding table.
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.
vlan-id vlan-id Enter the keywords vlan-id then the VLAN to which the
host belongs. The range is from 2 to 4094.
ip ip-address Enter the keyword ip then the IP address that the server is
leasing.
interface type Enter the keyword interface then the type of interface to
which the host is connected:
498
Dynamic Host Configuration Protocol (DHCP)
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