Dell M6220 User Configuration Manual page 952

Command
ip helper-address
server-address
{
dest-udp-port
discard} [
| dhcp | domain |
isakmp | mobile-ip |
nameserver | netbios-
dgm | netbios-ns | ntp |
pim-auto-rp | rip |
tacacs | tftp | time]
exit
exit
show ip helper-address
vlan-id
[vlan ]
show ip helper statistics View the number of DHCP and other UDP packets
952
Configuring L2 and L3 Relay Features
Purpose
Configure the relay of certain UDP broadcast packets
| received on the VLAN routing interface(s). This command
takes precedence over an ip helper-address command given
in global configuration mode.
Specify the one of the protocols defined in the command
or the UDP port number.
server-address
•
address to which relayed UDP broadcast packets are sent.
The server address cannot be an IP address configured on
any interface of the local router.
dest-udp-port
•
to 65535.
Exit to Global Config mode.
Exit to Privileged EXEC mode.
View IP helper (L3 relay) settings for all interfaces or for
the specified VLAN routing interface.
processed and relayed by the UDP relay agent. To reset the
statistics to 0, use the clear ip helper statistics command.
— The IPv4 unicast or directed broadcast
— A destination UDP port number from 0