Quick Reference Guide

236 | DHCP Server Commands
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Syntax
ip dhcp excluded-address lowaddress [highaddress]
The no version of this command removes the excluded IP addresses for a DHCP client.
Default
none
Mode
Global Config
ip dhcp filtering (global)
This command enables DHCP filtering on all interfaces (globally). DHCP requests/replies will be
blocked on all physical and VLAN interfaces.
Syntax
[no]ip dhcp filtering
The no version of this command removes DHCP filtering globally.
Default
no filtering
Mode
Global Config
ip dhcp filtering (interface)
This command specifies the selected interface as trusted/untrusted for DHCP filtering. DHCP requests/
replies will be allowed on the selected interface, overriding the global setting.
Syntax
[no] ip dhcp filtering trust
The no version of this command blocks DHCP messages on the selected port.
Default
no filtering
Mode
Interface Config
ip dhcp ping packets
This command is used to specify the number in a range from 2-10, of packets a DHCP server sends to
a pool address as part of a ping operation. Setting the number of ping packets to 0 is the same as ‘no ip
dhcp ping packets’ and will prevent the server from pinging pool addresses.
Syntax
ip dhcp ping packets 0,2-10
Use no ip dhcp ping packets to prevent the server from pinging pool addresses and will set the
number of packets to 0.
Default
2
Mode
Global Config