[syslinux] Has anyone any insight as to why RedHatEnterprise Level 5 is broken as far as PXE booting is concerned.

[RgSalisbury]

OK

Different symptons
I have now tried on a RHEL different machine with a different nic.(Intel 
ethernet pro 100)
But same client & a different client

Client messages are:

##################
PXE-T02  Only absolute filenames allowed
PXE-E3C  TFTP ERROR - Access Violation
PXE-M0F: Exiting Broadcom PXE ROM.
##################
##################
PXE-T02  Only absolute filenames allowed
PXE-E3C  TFTP ERROR - Access Violation
PXE-M0F: Exiting Intel PXE ROM.
##################
Added
next-server

to My minimal dhcpd.conf & looks thus:
##################
ddns-update-style interim;
ignore client-updates;
subnet 172.16.0.0 netmask 255.255.255.0 {
      option routers                 172.16.0.254;
      option subnet-mask       255.255.255.0;
host abcd  {hardware ethernet 00:01:6c:ca:24:7b ;fixed-address 172.16.0.30;}
filename "pxelinux.0";
allow booting;
allow bootp;
      range dynamic-bootp 172.16.0.128 172.16.0.254;
      default-lease-time 21600;
      max-lease-time 43200;
      host ns {
            next-server 172.16.0.254;
            hardware ethernet 00:02:B3:99:05:A0;
# 00:02:B3:99:05:A0 is MAC  on the dhcpd & tftp server box
            fixed-address 172.16.0.254;
      }
}
##################


> RgSalisbury wrote:
>>> Could you produce a wireshark trace of the traffic?
>>>
>> A little more with verbosity turned up & no arp messages
>> #############################################################################
>>
>> 04:20:17.129158 IP (tos 0x0, ttl 20, id 16, offset 0, flags [none], 
>> proto:
>> UDP (17), length: 91) 172.16.0.253.57089 > 0.0.0.0.tftp: 63 RRQ
>> "pxelinux.cfg/01-00-01-6c-ca-24-7b" octet tsize 0 blks
>>
>
> Did you set "next-server" in "dhcpd.conf"?
>
> Seems to me that the client tries to TFTP from 0.0.0.0, after retrieving 
> "pxelinux.0".
>
> RHEL 5 might have a newer version "dhcpd" which no longer sets 
> "next-server"
> to "boot/dhcp server" when missing in "dhcpd.conf".
>
> Axel
>
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