On 1 July 2011 02:08, Brian <a...@cityscape.co.uk> wrote: > On Thu 30 Jun 2011 at 08:33:47 +0800, wolf python london wrote: > >> # The primary network interface >> allow-hotplug eth0 >> #NetworkManager#iface eth0 inet dhcp >> >> iface dsl-provider inet ppp >> pre-up /sbin/ifconfig eth0 up # line maintained by pppoeconf >> provider dsl-provider >> iface eth0 inet dhcp >> >> As you can see, the last line "iface eth0 inet dhcp" means I can >> get an ip via ifupdown and still use the dhcp to configure eth0. > > Why use dhclient when 'iface eth0 inet dhcp' does it all for you? Not > that it's forbidden but what is the purpose? > my fault! I thought the "pppoe" had nothing to do with the dhclient so I leave it out .
Here I can connect to the internet via PPPOE, so when I want to access the intranet , I can cut the PPPOE connect and use dhclient to get an ip and netmask (not at boot time) > The pre-up line is also puzzling. What is it meant to achieve that > 'iface eth0 inet dhcp' doesn't? The commented portion at the end of the > line is not allowed in /e/n/i. Please see the manual for ifupdown. yes , this line is maintained by PPPOE , and I have use it for nearly ONE year , in Lenny & Squeeze, to be honest ,it's added by the PPPOE(I haven't modified it yet). I paste the /e/n/i in Squeeze here(http://pastie.org/2147825), the difference is I set Squeeze's ppp0 interface up at boot time. And the dhclient in Squeeze is fine . Actually in Wheezy (& Sid) , it was fine ,but after upgrade , it sucks . > Neither may be the cause of your perceived problem but end of line > comments can lead to trouble. > Maybe , I'll have a try . > The arp table after using dhclient (presumably ifup has run) being > incomplete may have something to do with the nature of the gateway > router but that's a wild guess. > dhclient way cannot get the gateway's MAC address, while ifupdown can do . Maybe that's the problem . > There should be no difference between auto and allow-hotplug for the > interface. But try it and see. ok, have a try and check it out . Thanks , Brian. > > > -- > To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org > with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org > Archive: http://lists.debian.org/20110630180814.GH15615@desktop > > -- ________________________ Yes, I use Debian GNU/L wolf python london(WPL) Do as you soul should do ! ________________________ -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/banlktikpbsaxfkpsvr5cbogukq19uwn...@mail.gmail.com
