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148
DHCP Filtering
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DELL CONFIDENTIAL – PRELIMINARY 9/13/06 – FOR PROOF ONLY
Command Mode
Interface configuration (Ethernet, Port-channel)
User Guidelines
•
Configure as “trusted”, ports that are connected to a DHCP server or to other switches or
routers.
•
Configure as “untrusted”, ports that are connected to DHCP clients.
•
The software would flood DHCP requests to trusted ports only.
Example
The following example configures a port as trusted for DHCP filtering purposes.
show i
p
dhc
p
filte
r
ing
Use the
show ip dhcp filtering
EXEC command to display the DHCP filtering configuration.
Syntax
show ip dhcp filtering
[
ethernet
interface |
port-channel
port-channel-number
]
•
interface
—Specify
Ethernet port.
•
port-channel-number
—Specify
Port-channel number.
Default Configuration
The interface is untrusted.
Command Mode
EXEC
User Guidelines
There are no user guidelines for this command .
console (config)# interface 1/e7
console (config-if)# ip dhcp filtering trust