Maybe you need to edit /etc/dhcpcd.conf? If that's what you are using or equivalent if you are using a different client.
Does your network support ipv6? If not, have you tried disabling it altogether? (I think you can do this temporarily for a single boot by editing the parameters on the kernel command line if you are using something like grub to boot.)
stibi wrote:There might be some connection with this problem: https://bbs.archlinux.org/viewtopic.php?id=170008 ?Why do you think this is related? Have you tried the suggested work around?What have you tried? Have you searched for that error?