I ran into something similar but I can't remember the exact details. But as I recall, a so-called "proxy DHCP server" doesn't provide an IP address like a normal DHCP server does. It provices information that can help the client boot, etc, but not an ordinary DHCP Offer message with the client IP address filled in. So that may cause some difficulties for the router.
Also, PXE requests go to UDP port 4011 rather than the ordinary DHCP server port 68. You may have to tell your Cisco router to forward for port 4011 with the "ip forward-protocol udp 4011" command. I couldn't find anything useful at either Novell or Cisco's sites (not too surprising), but check this article at Microsoft. It might be helpful: http://support.microsoft.com/default.aspx?scid=kb;EN-US;q257579 Priscilla At 04:38 PM 12/23/01, Tribavan Raina wrote: >Hi all.. > >I have PXE clients in one vlan and 2 netware servers in another vlan out of >which one is DHCP server and another oneis proxy dhcp server . >As long as I keep clients in same Vlan it works fine but as soon as I take >them to different Vlan there is a problem. >I have used Ip helper-address. > > >1)When the PXE clients and dhcp server is in same vlan (2) they work fine >and no problems. > >2)When I put PXE clients in another vlan (249) ..they are not able to boot.I >used debug commands and I could see the router forwarding the dhcp packets >and client also getting them,but we are using dhcp and proxy dhcp for our >PXE clients. > >3)The dhcp and proxy dhcp server are on 2 different netware servers > >10.30.2.2 (Dhcp server) >10.30.2.9 (Prxoy dhcp server). > >The vlan 2 is 10.30.2.0 with mask 255.255.255.0 and client vlan is 240 >having dhcp scope as 10.30.249.0. >The layer 3 card in 4006 is doing the routing and has vlan interfaces for >both vlans.The ip helper address have been set as > >int g4.3 >encapsulation dot1q 249 >ip address 10.30.249.1 255.255.255.0 >ip helper-address 10.30.2.2 >ip helper-address 10.30.2.9 > >. > >4)When I used debug command on the router I could see packets coming back >from 10.30.2.2(dhcp) and 10.30.2.9(proxydhcp) but router forwards only >packets from 10.30.2.2(dhcp) and not 10.30.2.9(proxydhcp). > >5)For PXE to work properly it has to get response from both dhcp and dhcp >proxy ,since it doenst get response from dhcp proxy it stops booting. > >Any clues.. >regds >Tribavan Raina ________________________ Priscilla Oppenheimer http://www.priscilla.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=30004&t=30004 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
