can't: *ping my qemu machine from linux(tryed Knoppix and windows2000) *ping my machine from qemu(tryed Knoppix and windows2000) I have set-up Qemu the gentoo way: i used /etc/conf.d/net in order to set up the tap device: first the tap device is in the kernel(and not as module) i've all the details in the web link such as tcpdump Reproducible: Always
Not baselayout. Also no real information here whatsoever; like qemu version, emerge --info, your configuration? Plus *don't* refer to forums.gentoo.org for bug description, renders searching for bugs completely useless.
# emerge --info Portage 2.1.2-r9 (default-linux/x86/2006.1/desktop, gcc-4.1.1, glibc-2.5-r0, 2.6.20-gentoo_sempron_2500 i686) ================================================================= System uname: 2.6.20-gentoo_sempron_2500 i686 AMD Sempron(tm) 2500+ Gentoo Base System release 1.13.0_alpha12 Timestamp of tree: Thu, 01 Mar 2007 16:00:01 +0000 dev-lang/python: 2.4.3-r4 dev-python/pycrypto: 2.0.1-r5 sys-apps/sandbox: 1.2.17 sys-devel/autoconf: 2.13, 2.61 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2, 1.10 sys-devel/binutils: 2.16.1-r3 sys-devel/gcc-config: 1.3.14 sys-devel/libtool: 1.5.22 virtual/os-headers: 2.6.17-r2 ACCEPT_KEYWORDS="x86" AUTOCLEAN="yes" CBUILD="i686-pc-linux-gnu" CFLAGS="-O2 -march=athlon-xp -pipe" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/3.5/env /usr/kde/3.5/share/config /usr/kde/3.5/shutdown /usr/share/X11/xkb /usr/share/config" CONFIG_PROTECT_MASK="/etc/env.d /etc/gconf /etc/revdep-rebuild /etc/terminfo" CXXFLAGS="-O2 -march=athlon-xp -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig distlocks metadata-transfer sandbox sfperms strict" GENTOO_MIRRORS="http://distfiles.gentoo.org http://distro.ibiblio.org/pub/linux/distributions/gentoo" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --delete-after --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/overlay" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="3dnow 3dnowex 7zip X a52 aac acl adns alsa amr apache2 asf berkdb bitmap-fonts bl blender-game cairo cdda cddb cdr chardet clearcase cli contrarius cracklib cran crypt css cups cvs dbus dga divx dri dts dv dvd dvdr dvdread editor eds effects emboss enca encode examples exif expat fam fat ffmpeg firefox flac foomaticdb gdbm gif gimpprint glsa gmedia gpm gstreamer gtk hal hfs httpd iconv inkjar inquisitio ipv6 isdnlog jfs jpeg jpeg2k kde kerberos kqemu lcms ldap libg++ libnotify lzo mad matroska midi mikmod mmx mmxext mng mp3 mp4 mpeg mpi musepack ncurses nls nptl nptlonly nsplugin ntfs ogg openal openexr opengl pam pcre perforce perl php plugin png ppds pppd python qa qt3 qt4 quicktime quotas readline realmedia reflection reiser4 reiserfs rt2500pci rtc rtsp samba sdl session skins sox speex spell spl srteam sse ssl stream subversion svg swat tcpd tga theora tiff timidity tordns truetype truetype-fonts type1-fonts unicode usb vcd vidx vlm vorbis wma wmf wmp wxwindows x264 x86 xanim xfs xml xorg xprint xv xvid xvmc yv12 zlib zsh" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1 emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mulaw multi null plug rate route share shm softvol" ELIBC="glibc" INPUT_DEVICES="keyboard mouse evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" USERLAND="GNU" VIDEO_CARDS="radeon" Unset: CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL, LDFLAGS, LINGUAS, PORTAGE_RSYNC_EXTRA_OPTS
# /etc/init.d/net.tap0 restart * Stopping tap0 * Bringing down tap0 * Destroying Tun/Tap interface tap0 ... [ ok ] * network interface tap0 does not exist * Please verify hardware or kernel module (driver) [ ok ] * network interface tap0 does not exist * Please verify hardware or kernel module (driver) * Starting tap0 * network interface tap0 does not exist * Please verify hardware or kernel module (driver) * network interface tap0 does not exist * Please verify hardware or kernel module (driver) * network interface tap0 does not exist * Please verify hardware or kernel module (driver) * Creating Tun/Tap interface tap0 ... [ ok ] * Bringing up tap0 * 192.168.0.1/24
# ifconfig lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:615 errors:0 dropped:0 overruns:0 frame:0 TX packets:615 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:11070 (10.8 Kb) TX bytes:11070 (10.8 Kb) ra0 Link encap:Ethernet HWaddr 00:08:A1:A0:1B:B7 inet addr:192.168.1.105 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::208:a1ff:fea0:1bb7/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:99336 errors:0 dropped:0 overruns:0 frame:0 TX packets:84457 errors:444 dropped:444 overruns:0 carrier:0 collisions:12484 txqueuelen:1000 RX bytes:135055376 (128.7 Mb) TX bytes:7223017 (6.8 Mb) Interrupt:22 Base address:0xc000 tap0 Link encap:Ethernet HWaddr A2:66:A4:F3:E2:0D inet addr:192.168.0.1 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::a066:a4ff:fef3:e20d/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:9 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)
qemu -localtime -m 64 -hda /mnt/300/qemu/win2k.img -net nic -net tap,script=no,ifname=tap0
Created attachment 113679 [details] tcpdump
i tryed to reporoduce it on my laptop without sucess
I did found the same bug. No communication is possible between the host and the QEMU guest. Looking in detail, you can see that the tap interface has txqueuelen:0. No packets can go host through guest (in the reverse sense, comm is feasible, as tcpdump shows). As a workaround, I tried the following. It worked for me. /sbin/ip link set tap0 txqueuelen 500 Or better, add the following lines to /etc/conf.d/net: postup() { if [ ${IFACE} = tap0 ] ; then /sbin/ip link set ${IFACE} txqueuelen 500; fi } If you create the interface manually (tunctl -t tap0 && ip link set tap0 up) the txqueulen is ok (500). So the cause must lie in the network scripts. I would appreciate some feedback. In order to confirm this...
(In reply to comment #8) > I did found the same bug. No communication is possible between the host and the > QEMU guest. > > Looking in detail, you can see that the tap interface has txqueuelen:0. No > packets can go host through guest (in the reverse sense, comm is feasible, as > tcpdump shows). > > As a workaround, I tried the following. It worked for me. > /sbin/ip link set tap0 txqueuelen 500 > > Or better, add the following lines to /etc/conf.d/net: > > postup() { > if [ ${IFACE} = tap0 ] ; then /sbin/ip link set ${IFACE} txqueuelen 500; fi > } > thanks it works > If you create the interface manually (tunctl -t tap0 && ip link set tap0 up) > the txqueulen is ok (500). So the cause must lie in the network scripts. > > I would appreciate some feedback. In order to confirm this... >
Do both of you have openvpn installed? If so, what version?
I do have latest stable (net-misc/openvpn-2.0.6). This bug seems the same as # 150791 (http://bugs.gentoo.org/show_bug.cgi?id=150791). I have looked my emerge history. What still doesn't make sense to me is that I emerged version 2.0.6 on April 2006. But this problem began after other updates (many months later). Any light here?
I update the ifup/ifdown scripts to be the same as kvm.
