Administrator Guide

970 Snooping and Inspecting Traffic
ip dhcp snooping
database write-delay
seconds
Configure the interval, in seconds, at which the DHCP
Snooping database will be stored in persistent storage. The
number of seconds can range from 15–86400.
ip dhcp snooping limit
{none | rate
rate [burst
interval seconds ]}
Configure the maximum rate of DHCP messages allowed
on the switch at any given time.
• rate —The maximum number of packets per second
allowed (Range: 0–300 pps).
•
seconds —The time allowed for a burst (Range: 1–15
seconds).
interface interface Enter interface configuration mode for the specified port
or LAG. The
interface variable includes the interface type
and number, for example tengigabitethernet 1/0/3. For a
LAG, the interface type is port-channel.
A range of ports can be specified using the interface range
command. For example, interface range
tengigabitethernet 1/0/8-12 configures interfaces 8, 9, 10,
11, and 12.
ip dhcp snooping trust Configure the interface (or range of interfaces) as a trusted
port. DHCP server messages are not filtered on trusted
ports.
exit Exit to Global Configuration mode.
interface [range] vlan
vlan id
Enter interface configuration mode for the specified
VLAN or range of VLANs.
CTRL + Z Exit to Privileged EXEC mode.
show ip dhcp snooping
[interfaces]
View the DHCP snooping global and per port
configuration.
show ip dhcp snooping
binding [{static |
dynamic}] [interface
port ] [vlan vlan-id ]
View the entries in the DHCP snooping bindings database.
show ip dhcp snooping
database
View information about the persistent database
configuration.
show ip dhcp snooping
statistics
View the DHCP snooping statistics.
Command Purpose