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Diffstat (limited to 'results/classifier/gemma3:12b/network/1642421')
| -rw-r--r-- | results/classifier/gemma3:12b/network/1642421 | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/results/classifier/gemma3:12b/network/1642421 b/results/classifier/gemma3:12b/network/1642421 new file mode 100644 index 000000000..486a25c96 --- /dev/null +++ b/results/classifier/gemma3:12b/network/1642421 @@ -0,0 +1,66 @@ + +qemu-system-x86_64: ipv6 and dns is broken with netdev user + +Hi, + +dhcp inside qemu returns an ipv6 address as dns-server. However this is not +working. If i replace it with the ipv4 address '10.0.0.2' dns is working +again. I would expect that the qemu emulated dhcp server responds either an +ipv4 configuration that is working or its dns server/forwarder listens on the +ipv6 address returned by the emulated dhcp server. + +I used latest qemu from git ( b0bcc86d2a87456f5a276f941dc775b265b309cf) and used the following commands: + +$ ./qemu-system-x86_64 -enable-kvm -M pc -device virtio-rng-pci -device +virtio-net-pci,netdev=user.0 -drive file=buildenv.img,if=virtio,bus=1,unit=0 +-no-reboot -netdev user,id=user.0,hostfwd=tcp::5022-:22,hostfwd=tcp::7587-:7588 +-m 1024 -usb -nographic -smp 4 + +buildenv.img is a debian jessie amd64 installation. + +Inside qemu the network is configured to use dhcp: + +$ cat /etc/network/interfaces +allow-hotplug eth0 +iface eth0 inet dhcp + +$ ifconfig eth0 +eth0 Link encap:Ethernet HWaddr 52:54:00:12:34:56 + inet addr:10.0.2.15 Bcast:10.0.2.255 Mask:255.255.255.0 + inet6 addr: fe80::5054:ff:fe12:3456/64 Scope:Link + inet6 addr: fec0::5054:ff:fe12:3456/64 Scope:Site + UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 + RX packets:10 errors:0 dropped:0 overruns:0 frame:0 + TX packets:28 errors:0 dropped:0 overruns:0 carrier:0 + collisions:0 txqueuelen:1000 + RX bytes:3215 (3.1 KiB) TX bytes:3638 (3.5 KiB) + +$ cat /etc/resolv.conf +nameserver fec0::3 + +$ arp google.de +google.de: Host name lookup failure + +$ strace -f arp google.de +... +socket(PF_INET6, SOCK_DGRAM|SOCK_NONBLOCK, IPPROTO_IP) = 4 +connect(4, {sa_family=AF_INET6, sin6_port=htons(53), inet_pton(AF_INET6, "fec0::3", &sin6_addr), sin6_flowinfo=0, sin6_scope_id=0}, 28) = 0 +poll([{fd=4, events=POLLOUT}], 1, 0) = 1 ([{fd=4, revents=POLLOUT}]) +sendto(4, "\17\320\1\0\0\1\0\0\0\0\0\0\6google\2de\0\0\1\0\1", 27, MSG_NOSIGNAL, NULL, 0) = 27 +poll([{fd=4, events=POLLIN}], 1, 5000) = 0 (Timeout) +poll([{fd=4, events=POLLOUT}], 1, 0) = 1 ([{fd=4, revents=POLLOUT}]) +sendto(4, "\17\320\1\0\0\1\0\0\0\0\0\0\6google\2de\0\0\1\0\1", 27, MSG_NOSIGNAL, NULL, 0) = 27 +poll([{fd=4, events=POLLIN}], 1, 5000) = 0 (Timeout) +close(4) = 0 +... + +$ echo nameserver 10.0.0.2 > /etc/resolv.conf + +$ arp google.de +google.de (216.58.208.35) -- no entry + +Note: I reported this bug also to debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=844566 + +Regards, + + Manuel \ No newline at end of file |