Version
Description
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.
DHCP snooping supports Layer 3 using DHCP Relay Agent (
ip helper-address
)
and Layer 2. 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
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
Description
9.7(0.0)
Introduced on the S4810, S4820T, S6000 and Z-Series.
ip dhcp snooping binding
Create a static entry in the DHCP binding table.
Z9500
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.
726
Dynamic Host Configuration Protocol (DHCP)