[syslinux] problems with tftp-hpa timing out.

[James S. Martin]

I'm difficulty diagnosing a tftp-hpa problem.  Specfically, when 
performing a PXE boot, the machine hangs at the "TFTP...." and times out.

This is only occuring at one network location (we'll call it network A).

Now on network B, the computers on network can tftp boot no problem.

If I run a tftp client from my workstation to connect to the tftp-hpa 
server on network A, I can retrieve a file with no problems.

If I change the tftp server on newtork A to the generic Sun tftp server, 
it attempts to download pxelinux.0, but fails because of the missing 
blksize options, as expected.

I can boot from network A to a tftp-hpa server in network B, but can't 
TFTP boot from network B to network A.

(Sorry this sounds like one of those "2 trains travelling at 50mph.." 
story problems from 5th grade math).

My assumption is that the tftp-hpa server works fine in network A 
because I can make a tftpclient connection to it from my workstation. 
My assumption that the server I'm trying to boot in network A works fine 
because it can connect to the tftp-hpa server in network B.  My issue is 
that I can't figure out why the network A PXE client would connect to 
the sun tftpd and actually start to download pxelinux.0, but not be able 
to do anything with the tftp-hpa.  Can anyone offer some additional 
advice/insight?

Thanks,

James