Re: difference between these two commands (Ip helper-address &

From: sabrina pittarel (sabri_esame@yahoo.com)
Date: Sun Aug 27 2006 - 18:40:58 ART

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Hi Pandi,
 in my understanding:
 
 ip helper-address <address>
 
 is used to convert *received* broadcast packets for particular UDP ports into unicast/subnet broadcast packets and then route them accordingly. The BOOTP ports belongs to the list of supported UDP ports by default.
 
 The
 
 ip dhcp-server <address>
 
 command is used when the router itself has to send a dhcp request to the DHCP server.
 
 Sabrina

----- Original Message ----
From: PANDI MOORTHY <moorthypandi@gmail.com>
To: Cisco certification <ccielab@groupstudy.com>
Sent: Thursday, August 24, 2006 8:11:24 PM
Subject: difference between these two commands (Ip helper-address & Ip dhcp-server ),

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

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