DHCP

utawakevou · ‎12-17-2002

We are currently in the process of moving to DHCP. Servers issuing IP while routers relaying DHCP request. Do I have to enable "IP direct broadcast" on the ethernet or fastethernet port ?

huizhan.zhang · ‎12-17-2002

No ,you can config "ip help address xxx" on port .

prafuljaded · ‎12-18-2002

Chk out : http://www.cisco.com/warp/public/779/smbiz/service/knowledge/tcpip/dhcp.htm

utawakevou · ‎12-18-2002

I have already configured IP helper address and block the other UDP ports except port 67 and 68. I found out this command on the ethernet port

(no ip direct broadcast)

My question is, will I need to enable "IP direct broadcast" ?

huizhan.zhang · ‎12-18-2002

hi

when you configure ip helper address",the router will enable to change the DHCP broadcast packet to unicast packet,so it not need to enable ip direct broadcast on port .

utawakevou · ‎12-19-2002

Thank you so much. I think that was the answer to my question.

msingla · ‎12-23-2002

Hi U should take care while using ip helper command as it by default forwards 8 types of UDP traffic so enable what ever u require ,why to allow unnecessary bodcasts pass through the router.use ip forward prtocol command... for this

choywy · ‎12-22-2002

Hi,

It is better to use the "ip helper" command. It will forward those BOOTP/DHCP UDP ports to your DHCP server...

Thanx...