[libvirt] how to use macvtap in kvm guest

Hi I am creating macvtap0 interface on my eth1 interface. ip link show macvtap0 133: macvtap0@eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UNKNOWN qlen 500 link/ether 3e:63:18:f3:49:63 brd ff:ff:ff:ff:ff:ff guest interface file- <interface type='direct'> <mac address='3e:63:18:f3:49:63'/> <source dev='eth0' mode='bridge'/> <model type='virtio'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> </interface> Now when I do- Virsh define guest works fine But when I do virsh start guest Dmesg shows error macvtap0:no ipv6 routers present libvirtd[24907]: segfault at 0 ip 0000003e22280062 sp 00007fd3057f8cb8 error 4 in libc-2.12.so[3e22200000+187000] and even if guest starts its eth interface is not created DISCLAIMER: ----------------------------------------------------------------------------------------------------------------------- The contents of this e-mail and any attachment(s) are confidential and intended for the named recipient(s) only. It shall not attach any liability on the originator or NECHCL or its affiliates. Any views or opinions presented in this email are solely those of the author and may not necessarily reflect the opinions of NECHCL or its affiliates. Any form of reproduction, dissemination, copying, disclosure, modification, distribution and / or publication of this message without the prior written consent of the author of this e-mail is strictly prohibited. If you have received this email in error please delete it and notify the sender immediately. . -----------------------------------------------------------------------------------------------------------------------

On 12/09/2011 12:28 PM, Amit Tewari wrote:
Hi
I am creating macvtap0 interface on my eth1 interface.
ip link show macvtap0
133: macvtap0@eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UNKNOWN qlen 500
link/ether 3e:63:18:f3:49:63 brd ff:ff:ff:ff:ff:ff
guest interface file-
<interface type='direct'>
<mac address='3e:63:18:f3:49:63'/>
<source dev='eth0' mode='bridge'/>
<model type='virtio'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
</interface>
Now when I do-
Virsh define guest works fine
But when I do virsh start guest
can guest gain ip?
Dmesg shows error
macvtap0:no ipv6 routers present
libvirtd[24907]: segfault at 0 ip 0000003e22280062 sp 00007fd3057f8cb8 error 4 in libc-2.12.so[3e22200000+187000]
and even if guest starts its eth interface is not created
could you provide your host os, guest os, libvirt, qemu-kvm version? it is fine as i tried, no segment fault message and the guest can get ip.
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participants (2)
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Amit Tewari
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xhu