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Thanks for the reply. Please could you repeat the tcpdump using the
command

tcpdump -s 0 -w capturefile

and send me the resulting file? That has far more information than
tcpdump prints.


Cheers,

Simon.

On 20/01/17 08:39, Steven Shiau wrote:
> Hi Simon,
> 
> Thanks for your reply. I am answering you in the following.
> 
> On 2017/01/20 06:47, Simon Kelley wrote:
>> Your example 3 - I'm confused why that shouldn't work - the PXE
>> client seems to be making further requests which are bring
>> ignored. Would it be possible for you to get a packet dump of
>> that exchange using tcpdump?
> $ sudo tcpdump -ni ens38 'udp port 67 and udp port 68' tcpdump:
> verbose output suppressed, use -v or -vv for full protocol decode 
> listening on ens38, link-type EN10MB (Ethernet), capture size
> 262144 bytes 16:18:33.208355 IP 0.0.0.0.68 > 255.255.255.255.67:
> BOOTP/DHCP, Request from 00:0c:29:1d:9a:d1, length 347 
> 16:18:36.205647 IP 192.168.22.254.67 > 255.255.255.255.68:
> BOOTP/DHCP, Reply, length 341 16:18:36.385548 IP 0.0.0.0.68 >
> 255.255.255.255.67: BOOTP/DHCP, Request from 00:0c:29:1d:9a:d1,
> length 359 16:18:36.386212 IP 192.168.22.254.67 >
> 255.255.255.255.68: BOOTP/DHCP, Reply, length 341 ^C 4 packets
> captured 4 packets received by filter 0 packets dropped by kernel
> 
>> 
>> Example 4 looks quite hopeful - the client is succerssfully 
>> downloading the bootx64.efi file (ignore the error before, that's
>> just testing for the existance of the file.
>> 
>> Can you see what's displayed on the client system at this point?
> It's blank screen due to the background_image for grub is not 
> downloaded,  and in the end the grub shows no grub.cfg error, as 
> attached. That format is from the grub prefix we added by: 
> ======================================= set
> prefix=(tftp)/grub-efi.cfg echo "Grub CPU and platform: \$grub_cpu,
> \$grub_platform" echo 'Network status: ' net_ls_cards net_ls_addr 
> net_ls_routes
> 
> tr --set pretty_mac x: x- \$net_default_mac
> 
> echo "Loading config file \$prefix/grub.cfg-01-\$pretty_mac..." 
> configfile \$prefix/grub.cfg-01-\$pretty_mac
> 
> echo "Loading config file \$prefix/grub.cfg-\$net_default_ip..." 
> configfile \$prefix/grub.cfg-\$net_default_ip
> 
> echo "Loading config file: \$prefix/grub.cfg" configfile
> \$prefix/grub.cfg
> 
> echo "Could not find config file \$prefix/grub.cfg-\$pretty_mac, 
> \$prefix/grub.cfg-\$net_default_ip or \$prefix/grub.cfg!" sleep 15 
> ======================================= This is exactly the same
> problem as mentioned here: 
> http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2016q4/010931
.html
>
> 
i.e., only grub efi is downloaded, while the rest of required files are
> not downloaded. As I mentioned for comparison, for non-proxy mode
> with same configuration, it works well.
> 
> Thanks again.
> 
> Steven
> 
> 
> 
> _______________________________________________ Dnsmasq-discuss
> mailing list Dnsmasq-discuss@lists.thekelleys.org.uk 
> http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
> 
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