> > However, i just installed Jaunty RC (AMD64), and i
> couldn't get an
> > address via DHCP. So it seems. Ethernet and DHCP is
> supposed to be
> > pretty agnostic, so i don't see why a different
> version or different
> > arch would give problems. So it could be problem
> interfacing with the
> > Ethernet card itself? However... doing an ifconfig, i
> can see that
> > eth0 gets detected, and its HWaddr (MAC) is correct.
> But, of course,
> > there is no inet addr.
>
> 0] make sure that eth0 = the correct interface that you
> plugged into by
> looking at dmesg output before and after
> plugging in the ethernet.
>
> 1] install tcpdump and start a packet capture
>
> sudo /usr/sbin/tcpdump -n -i eth0 -s 0
> -w /tmp/packets.pcap
>
> While the capture is running, restart your dhcp client.
> After that
> fails, stop the capture (CTRL-C or sudo killall tcpdump)
> and post it
> online someplace where we can review it.
>
> 2] review packet capture with wireshark:
>
> http://wireshark.org/download.html
>
> When we have the file, we can review the capture as well
> and see where
> things are going awry.
Thanks Patrick,
i have done dmesg and tcpdump... i'll post (what seems to me) as the important
bits here. Please let me know if the full files are really needed. From my very
limited knowledge, it seems that it's trying to use IPv6...
For dmesg, these are the few additional lines after i plugged in the ethernet
cable (i unplugged it before booting):
[ 168.930758] skge eth0: Link is up at 100 Mbps, full duplex, flow control none
[ 168.931355] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
[ 179.232011] eth0: no IPv6 routers present
For tcpdump, here is the whole output during the failed DHCP request (i used
tcpdump -r to parse the captured pcap file)...
18:29:07..003884 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP,
Request from 00:1b:fc:28:6c:59 (oui Unknown), length 300
18:29:13.006158 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request
from 00:1b:fc:28:6c:59 (oui Unknown), length 300
18:29:22.009067 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request
from 00:1b:fc:28:6c:59 (oui Unknown), length 300
18:29:42.020064 IP 0.0.0.0.bootpc > 255.255.255.255.bootps: BOOTP/DHCP, Request
from 00:1b:fc:28:6c:59 (oui Unknown), length 300
The MAC address in the tcpdump above is correct; it's of the eth0 interface.
(Just realised my desktop clock is wrong, but i digress...)
Thanks and Regards,
Edwin
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