Re: Netboot E250 -- tftp problem
Geert Stappers wrote:
Thank YOU for the good posting! It really shows you did your part!!!
Thank you, actually this my first post on the list.
The 'Time out waiting for ARP/RARP packet' is normal,
if there was no RARP deamon responding,
there would be much more RARP Time-out messages.
Ah, I see.
But the '4200 Data Access Error' is a scary one ...
4000 is the default download start address.
4200 is start plus 200. 0x200 is 512 decimal, the size of a default TFTP packet.
Oh, yes, I can see in wireshark TFTP server is sending 512B per packet,
and there is problem with the second segment, But I didn't realize that
'4200' means this.
How to classify 'Data Access Error' is the challenge.
If there are problems with memory, the 'ok' wouldn't probably not been
show. Just do a simple check by these five separate command at the 'ok'
prompt:
40000 400 dump
40000 400 55 fill
40000 400 dump
40000 400 AA fill
40000 400 dump
to make sure it is really no memory problem.
Memory is 1G large. I will check that tomorrow when I have access to E250.
I see one possible cause of the probleem: Size of the TFTP packet.
I imagine that the first TFTP block is transferred fine
and the next block goes wrong, due allocated size and actual size
differences.
The wireshark analyzis could reveal it ...
[1]
I think your guess fits good with what I have seen. I can sense the
distant light begins shining upon it -- The problem has annoyed me for days.
Over here I do succesfull netboots on an Ultra 5, it has OpenBoot 3.19.
As tftp server is also tftpd-hpa used, under inetd. But shouldn't make
a difference. Difference is that I don't do '-r blocksize'
I will try without '-r blocksize' tomorrow.
I'm willing to check a wireshark slash tcpdump .pcap file
that is all ready filtered to contain only packets that
match the MAC address of the E250.
You may send that binary file off-list to me.
Greet, I have sent the binary to you. And sorry for the partially
duplicated mails. Thank you very much indeed.
--
续本达
Xu, Benda
Fundamental Science of Mathematics and Physics,
Tsinghua University, Beijing, P.R.China
http://learn.tsinghua.edu.cn:8080/2005012177/index.html
http://thirsty.phys.tsinghua.edu.cn/MyWiki/heroxbd
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