The ip helper-address is the right direction. Are there any filters on the WAN side, either on your router or at the ISP? You need UDP port 67 enabled for your setup to work. As for the ip forward-protocol command, when you enable the ip helper-address, several protocols get forwarded, not just dhcp. That can result in unnecessary traffic going across your WAN cannection, so you can disable other types of traffic using these commands:
no ip forward-protocol udp 37 no ip forward-protocol udp 49 no ip forward-protocol udp 53 no ip forward-protocol udp 69 no ip forward-protocol udp 137 no ip forward-protocol udp 138 But it sounds like your biggest obstacle is something blocking your DHCP traffic on the WAN side. Is this going through a cable provider like @home or roadrunner? I've had headaches in the past as a result of them blocking various types of UDP traffic. Hal Logan Network Specialist / Adjunct Faculty Computing and Engineering Technology Manatee Community College > -----Original Message----- > From: Rashid Lohiya [mailto:[EMAIL PROTECTED]] > Sent: Monday, November 26, 2001 5:14 PM > To: [EMAIL PROTECTED] > Subject: DHCP Question [7:27380] > > > Hey All, > > I was trying to help a freind get his DHCP working, but got stuck. > > He has a DHCP server set up across the WAN. > > I know that routers drop broadcasts, so I thought I would be > able to turn > the DHCP/UDP broadcasts into unicasts by providing an > ip-helper address, on > the local ethernet pointing to the remote DHCP server, so I > did, but this > did not work. > > Secondly I tried putting on the ip dhcp-server a.b.c.d > command, and thought > maybe this would point incoming traffic towards the DHCP > server, but again > this did not work. > > I even tried doing the old ip forward-protocol udp statement. > > Then when I did a show run, I saw a no ip directed-broadcast > statement, on > the ethernet so I enabled that, but still no difference. > > Pls. Can someone give me a brief nudge in the direction I > should be going > next, or point out where I am going wrong. > > The DHCP server is working OK! I can ping it from the routers > and can get > addresses from the local network. > > The PC's are fine, waiting for an IP Address. > > My brain is tired and any hints would be appreciated. > > Regards, > > Rashid Lohiya > [EMAIL PROTECTED] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=27462&t=27380 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
