[syslinux] tftp open timeout but with no server side errors

[Geert Stappers]

Op 20090612 om 11:17 schreef Christopher Deneen:
> Background,
> 
> Client - realtek rtl8111c
> tftpd version is 5.0
> options on use -l -v
> 
~ Client screen message:
> 
> PXE-EX32 TFTP Open Timeout
> 
~ Server log:
> 
> Jun 12 10:48:38 damar in.tftpd[30132]: RRQ from 192.168.1.107 filename gpxelinux.0
> Jun 12 10:48:48 damar in.tftpd[30133]: RRQ from 192.168.1.107 filename gpxelinux.0
> Jun 12 10:49:24 damar in.tftpd[30134]: RRQ from 192.168.1.107 filename gpxelinux.0
> Jun 12 10:50:36 damar in.tftpd[30135]: RRQ from 192.168.1.107 filename gpxelinux.0
> etc.
> 
> The client has a valid ip and the server can communicate , tftpd-hpa
> tries to send it the file multiple times
> but it appears that it does not receive it. In order to get more
> information I tried atftpd which has more detailed logging
> and it reports continuous timeouts.
> 
> I was wondering if anyone has experienced this problem before or has
> any suggestions. I'd like to note
> this machine is identical to 40 other machines , to which about half boot.

My gutt feeling says there is something wrong with the network switches.

The booting half of the forty identical machines is connected to a "good switch port",
the non-booting half to an "bad switch port".

The  "bad switch ports" could be all in the same (bad) switch.
Good and bad could be in the same physical switch, where access ports
have different settings for negotition of speed and/or duplex mode.


Cheers
Geert Stappers