Format
no ip helper-address {<ip-address>}
{<1-65535>|dhcp|domain|isakmp|mobile-ip|nameserver|
netbios-dgm|netbios-ns|ntp|pim-auto-rip|rip|tacacs|tftp|time}
Mode
GlobalConfig
ip helper-address
Use this command to add a unicast helper address to the list of helper addresses on an interface.
This is the address of a DHCP server. This command can be applied multiple times on the routing
interface to form the helper addresses list until the list reaches the maximum supported helper
addresses.
Format
ip helper-address <ip-address>
{<1-65535>|dhcp|domain|isakmp|mobile-ip|nameserver|
netbios-dgm|netbios-ns|ntp|pim-auto-rip|rip|tacacs|tftp|time}
Mode
Interface Config
no ip helper-address
Use this command to remove the IP address from the previously configured list. The no command
without an <
ip-address
Format
no ip helper-address {<ip-address>}
{<1-65535>|dhcp|domain|isakmp|mobile-ip|nameserver|
netbios-dgm|netbios-ns|ntp|pim-auto-rip|rip|tacacs|tftp|time}
Mode
Interface Config
ip helper-address discard
Use this command to drop matching packets.
Format
ip helper-address discard
{<1-65535>|dhcp|domain|isakmp|mobile-ip|nameserver|
netbios-dgm|netbios-ns|ntp|pim-auto-rip|rip|tacacs|tftp|time}
Mode
Interface Config
Routing Commands
> argument removes the entire list of helper addresses on that interface.
v1.0, July 2010
Managed Switch CLI Manual, Release 8.0.3
4-38