<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:st1="urn:schemas-microsoft-com:office:smarttags" xmlns="http://www.w3.org/TR/REC-html40"> <head> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"> <meta name=Generator content="Microsoft Word 11 (filtered medium)"> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PersonName"/>  <style>  </style>  </head> <body bgcolor=white lang=EN-US link=blue vlink=purple> <div class=Section1> Hi,<o:p></o:p> No guest can not get ip.<o:p></o:p> When I do ifup eth0 it give error device not found.<o:p></o:p> <o:p> </o:p> <o:p> </o:p> <o:p> </o:p> Hostos=rhel 6.x86_64<o:p></o:p> Guest os= rhel 6.x86_64<o:p></o:p> Libvirt =0.8.7<o:p></o:p> Macvtap driver is loaded.<o:p></o:p> <o:p> </o:p> Qemu-kvm= 0.12.1.2<o:p></o:p> <o:p> </o:p> i think this error is creating problem<o:p></o:p> </u1:p><o:p></o:p> macvtap0:no ipv6 routers present<u1:p></u1:p><o:p></o:p> <o:p> </o:p> <div> <div class=MsoNormal align=center style='text-align:center'> <hr size=2 width="100%" align=center tabindex=-1> </div> From: xhu [mailto:xhu@redhat.com] Sent: Friday, December 09, 2011 10:53 AM To: Amit Tewari Cc: <st1:PersonName w:st="on">libvir-list@redhat.com</st1:PersonName> Subject: Re: [libvirt] how to use macvtap in kvm guest<o:p></o:p> </div> <o:p> </o:p> On 12/09/2011 12:28 PM, Amit Tewari wrote: <o:p></o:p> Hi<u1:p></u1:p><o:p></o:p> <u1:p> </u1:p><o:p></o:p> I am creating macvtap0 interface on my eth1 interface.<u1:p></u1:p><o:p></o:p> ip link show macvtap0<u1:p></u1:p><o:p></o:p> 133: macvtap0@eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UNKNOWN qlen 500<u1:p></u1:p><o:p></o:p> link/ether 3e:63:18:f3:49:63 brd ff:ff:ff:ff:ff:ff<u1:p></u1:p><o:p></o:p> <u1:p> </u1:p><o:p></o:p> guest interface file-<u1:p></u1:p><o:p></o:p> <u1:p> </u1:p><o:p></o:p> <interface type='direct'><u1:p></u1:p><o:p></o:p> <mac address='3e:63:18:f3:49:63'/><u1:p></u1:p><o:p></o:p> <source dev='eth0' mode='bridge'/><u1:p></u1:p><o:p></o:p> <model type='virtio'/><u1:p></u1:p><o:p></o:p> <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/><u1:p></u1:p><o:p></o:p> </interface><u1:p></u1:p><o:p></o:p> Now when I do-<u1:p></u1:p><o:p></o:p> Virsh define guest works fine<u1:p></u1:p><o:p></o:p> But when I do virsh start guest<o:p></o:p> can guest gain ip? <o:p></o:p> <u1:p></u1:p><u1:p> </u1:p><o:p></o:p> Dmesg shows error<u1:p></u1:p><o:p></o:p> <u1:p> </u1:p><o:p></o:p> macvtap0:no ipv6 routers present<u1:p></u1:p><o:p></o:p> libvirtd[24907]: segfault at 0 ip 0000003e22280062 sp 00007fd3057f8cb8 error 4 in libc-2.12.so[3e22200000+187000]<u1:p></u1:p><o:p></o:p> and even if guest starts its eth interface is not created<o:p></o:p> 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. <o:p></o:p> <pre><u1:p></u1:p><o:p> </o:p></pre><pre>DISCLAIMER: <o:p></o:p></pre><pre>----------------------------------------------------------------------------------------------------------------------- <o:p></o:p></pre><pre>The contents of this e-mail and any attachment(s) are confidential and<o:p></o:p></pre><pre>intended <o:p></o:p></pre><pre>for the named recipient(s) only. <o:p></o:p></pre><pre>It shall not attach any liability on the originator or NECHCL or its <o:p></o:p></pre><pre>affiliates. 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