I have noticed the same thing with KVM-87 and either the e1000 or the rtl8139 network models. I am on a 64-bit 2.6.18 RHEL 5.3 kernel with an Intel Q9300 processor.
Even statically assigning an IP to my bridged guest doesn't allow it to communicate with my network.
Specifying virtio as the NIC model allows a Fedora 11 live CD to network properly. KVM-86 allows the same Fedora 11 live CD to network properly regardless of which NIC model I choose.
----- Original Message -----
From: "John Wong" <johnw@xxxxxxxxxxxx>
To: "KVM list" <kvm@xxxxxxxxxxxxxxx>
Sent: Sunday, July 5, 2009 10:13:12 PM GMT -05:00 US/Canada Eastern
Subject: Qemu 0.10.50 CAN NOT get ip from dhcp server
I notice that, when i use qemu 0.10.50 (which from kvm-0.87.tar.gz), the
guest OS CAN NOT get the ip from dhcp server.
When i use qemu 0.10.0 (which from debian's kvm-0.85 package), the guest
OS CAN get the ip from the SAME dhcp server.
Please help, thank you.
My kvm network use bridge mode
My kvm launch script:
#!/bin/sh
NUM="9"
IMG="./openbsd-amd64.qcow2"
CDROM="/ntfs2/iso-cdrom/clonezilla-live-1.2.1-39.iso"
#CDROM="/kdchome/john/software/install46.iso"
#KVM="/usr/bin/kvm" # <--------- 0.10.0 which from debian kvm 0.85 package
KVM="/opt/kvm/bin/qemu-system-x86_64 -L /opt/kvm/share/qemu/" #
<--------- 0.10.50 which from kvm-0.87.tar.gz source code
USERID="$(whoami)"
PID="./pid.log"
iface="$(sudo /usr/sbin/tunctl -t tap${NUM} -b -u ${USERID})"
${KVM} -hda ${IMG} \
-net nic,vlan=${NUM},model=e1000,macaddr=00:AA:BB:CC:DD:0${NUM} \
-net
tap,vlan=${NUM},ifname="${iface}",script=/etc/kvm/kvm-ifup,downscript=/etc/kvm/kvm-ifdown
\
-localtime \
-usb -usbdevice tablet \
-k en-us -monitor stdio \
-soundhw all \
-cdrom ${CDROM} \
-m 1024 -vga cirrus -boot d $@
sleep 3
sudo /usr/sbin/tunctl -d ${iface}
exit $?
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