A Sexta 10 Dezembro 2010 20:08:58 Ferenc Wagner vocĂȘ escreveu: > Floris Bos <b...@je-eigen-domein.nl> writes: > > On Friday, December 10, 2010 05:12:39 pm Ferenc Wagner wrote: > >> Floris Bos <b...@je-eigen-domein.nl> writes: > >>> I think the arping applet should be enabled in the Busybox build. > >>> It helps a great deal in debugging general network issues and could be > >>> helpful to create a solution for some other bugs like: > >>> > >>> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=537271 (network may > >>> not be usable as soon as link is up) > >>> http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=606515 (Preseed > >>> installation does not wait for network to be ready) > >> > >> Please read > >> http://wiki.debian.org/DebianInstaller/FAQ#Q.3AWhyispingnotavailableinth > >> ede bugshell > >> > >> Roughly the same applies to arping. After all, you can cat > >> /proc/net/arp to check whether the gateway has a complete entry. > > > > But wouldn't you need to initiate network communication before an entry > > in /proc/net/arp for the gateway appears? > > Yes, sure. > > > Right now PXE preseed installations are broken, making Debian unsuitable > > for use by dedicated server providers. > > The Debian installer does not wait for the network link to come up (can > > take about 3 seconds on some NICs connected to a standard Gigabit > > switch), nor does it take into account that it can take 30 seconds > > before network activity is possible in spanning tree configurations. > > I agree that this is a problem, I've been bitten by this recently. > > > A simply 1-line fix if we had arping might be executing between netcfg > > and network-preseed: > > > > arping -f -c 35 $GATEWAY_IP > > > > (wait until you get an ARP reply from the gateway, timeout after 35 > > seconds/tries). > > Something like that should go *into* netcfg, between configuring the > network statically and querying the DNS for the name of the configured > IP address. > > For DHCP, udhcpc should be invoked with -t 20 or similar, so that it > doesn't just sleep most of the time but actually tries to get a license > during the time allowed by the dialog timeout. > > > I don't think calling wget 35 times, and grepping /proc/net/arp is a > > clean alternative, just to save 4 KB of space. > > wget isn't pretty, but one could do something like > > while [ "$i" -lt 30 ] && ! nc -w 1 GATEWAY 80 -e /bin/true; do i=$(($i + > 1)); done grep "^GATEWAY .* 00:00:00:00:00:00 " /proc/net/arp && echo fail > > for example. But netcfg is written in C, and this stuff belongs to > there, where one could do even better.
So should this BR be reassigned to netcfg as wishlist? -- Melhores cumprimentos/Best regards, Miguel Figueiredo http://www.DebianPT.org -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org