[yocto] QEMU machine is not reachable from outside network

[Bipnesh, Abhinav (Abhinav)]

Hi,

I was trying to access QEMU machine from other host (the host from where the machine is not being run). Below is the output of the command 'runqemu qemuarm (Primarily a core-image-minimal-dev image) ".

$ runqemu qemuarm

Continuing with the following parameters:
KERNEL: [/home/test/yocto/poky/build/tmp/deploy/images/qemuarm/zImage-qemuarm.bin]
ROOTFS: [/home/test/yocto/poky/build/tmp/deploy/images/qemuarm/core-image-minimal-dev-qemuarm-20141124054625.rootfs.ext3]
FSTYPE: [ext3]
Acquiring lockfile for tap0...
Using preconfigured tap device 'tap0'
If this is not intended, touch /tmp/qemu-tap-locks/tap0.skip to make runqemu skip tap0.
Running qemu-system-arm...
/home/test/yocto/poky/build/tmp/sysroots/x86_64-linux/usr/bin/qemu-system-arm -kernel /home/test/yocto/poky/build/tmp/deploy/images/qemuarm/zImage-qemuarm.bin -net nic,vlan=0 -net tap,vlan=0,ifname=tap0,script=no,downscript=no -M versatilepb -hda /home/test/yocto/poky/build/tmp/deploy/images/qemuarm/core-image-minimal-dev-qemuarm-20141124054625.rootfs.ext3 -no-reboot -show-cursor -usb -usbdevice wacom-tablet -no-reboot -m 128 --append "root=/dev/sda rw console=ttyAMA0,115200 console=tty ip=192.168.7.2::192.168.7.1:255.255.255.0 mem=128M highres=off "

Now when I try to ping a host from QEMU host. So for ping 192.168.42.46 I get a proper reply and it work fine. But when I try vice versa I get timeout error as below
ping 192.168.7.2
PING 192.168.7.2 (192.168.7.2) 56(84) bytes of data.
>From 192.168.7.1 icmp_seq=2 Destination Host Unreachable
>From 192.168.7.1 icmp_seq=3 Destination Host Unreachable
>From 192.168.7.1 icmp_seq=4 Destination Host Unreachable

So any thoughts how to fix this issue as need make my QEMU machine to talk to external world.

Thanks,
Abhinav
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