difference between these two commands (Ip helper-address & Ip dhcp-server ),

["PANDI MOORTHY" <moorthypandi@xxxxxxxxx>]

Hi

I just need to understand the usage of  these two commands (Ip
helper-address  & Ip dhcp-server ), if i need to forward dhcp request



I need to forward the LAN segment dhcp request to the DHCP-server in
different segment



Which option is most suitable?



1)      Int fas 0/0

Ip helper-address 10.1.1.1





Or





2)      At the global config

Ip dhcp-server 10.1.1.1

or do we need to configure both.



Pleased advice me. Thanks

Regards.
Pandi