<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 all,<o:p></o:p> In same previous scenario of macvtap ,Im not able to assign dhcp address to guest interface, and if I assign static ip of my lan to guest interface , than also it is not able to connect to the network..<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: libvir-list-bounces@redhat.com [mailto:libvir-list-bounces@redhat.com] On Behalf Of Amit Tewari Sent: Tuesday, December 13, 2011 5:11 PM To: xhu Cc: libvir-list@redhat.com Subject: Re: [libvirt] macvtap not working on kvm<o:p></o:p> </div> <o:p> </o:p> Hi,<o:p></o:p> Actually udev renames the eth0 interface in guest to eth1 because macvtap0 has different mac address then eth0 on host.. <o:p></o:p> Is there some way so that we can prevent changing this rename of eth0 to eth1 on guest. I don’t want to change udev files.<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: Tuesday, December 13, 2011 3:01 PM To: Amit Tewari Cc: <st1:PersonName w:st="on">libvir-list@redhat.com</st1:PersonName> Subject: Re: [libvirt] macvtap not working on kvm<o:p></o:p> </div> <o:p> </o:p> On 12/13/2011 12:59 PM, Amit Tewari wrote: <o:p></o:p> Hi all,<u1:p></u1:p><o:p></o:p> <u1:p> </u1:p><o:p></o:p> My test environment<u1:p></u1:p><o:p></o:p> Host os=rhel6.1<u1:p></u1:p><o:p></o:p> Guest os = rhel6.1<u1:p></u1:p><o:p></o:p> Libvirt=0.9.8<u1:p></u1:p><o:p></o:p> Kvm hypervisor<u1:p></u1:p><o:p></o:p> <u1:p> </u1:p><o:p></o:p> I have made this entry in guest xml 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> <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='0x03' function='0x0'/><u1:p></u1:p><o:p></o:p> </interface><u1:p></u1:p><o:p></o:p> <u1:p> </u1:p><o:p></o:p> Now when I start the guest <u1:p></u1:p><o:p></o:p> #virsh start guest<u1:p></u1:p><o:p></o:p> <u1:p> </u1:p><o:p></o:p> Following macvtap0 is created on host and is shown below<u1:p></u1:p><o:p></o:p> #ip link show macvtap0<u1:p></u1:p><o:p></o:p> 51: 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 52:54:00:55:AE:B5brd ff:ff:ff:ff:ff:ff<u1:p></u1:p><o:p></o:p> <u1:p> </u1:p><o:p></o:p> but when the guest is up and I try to perform<u1:p></u1:p><o:p></o:p> <u1:p> </u1:p><o:p></o:p> # ifup eth0<u1:p></u1:p><o:p></o:p> <u1:p> </u1:p><o:p></o:p> It gives following message<u1:p></u1:p><o:p></o:p> “Bringing up interface eth0: Device eth0 does not seem to be present, delaying initialization.<u1:p></u1:p><o:p></o:p> [FAILED]”<o:p></o:p> The interface name may change to ethN(N may be 1 or 2 ...) due to the change of guest interface mac address. You can log in guest and use command: "ip link show" to get the value of N. Then create ifcfg-ethN for it and use "ifup ethN" to start it in guest.<o:p></o:p> <u1:p></u1:p><u1:p> </u1:p><o:p></o:p> Guest eth interface does not create. What is the problem?<u1:p></u1:p><o:p></o:p> <u1:p> </u1:p><o:p></o:p> When I checked dmesg on host it gives following message—“macvatp0: ipv6 routers not present”<u1:p></u1:p><o:p></o:p> <u1:p> </u1:p><o:p></o:p> Please let me know how macvtap work on kvm.<u1:p></u1:p><o:p></o:p> <u1:p> </u1:p><o:p></o:p> <pre><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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