Service Manual

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.
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 Description
9.9(0.0) Introduced on the FN IOM.
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.
• For a ten-Gigabit Ethernet interface, enter the keyword tengigabitethernet.
• For a 40-Gigabit Ethernet interface, enter the keyword fortyGigE.
slot/port Enter the slot and port number of the interface.
1118 Security