Beasley, Julien
2011-Aug-26 22:35 UTC
[Xen-users] TAP adapter created for windows domU but not linux?
Hello, I have a dom0 running in SuSE. My first domU is also suse, and I noticed after running ifconfig that a vif1.0 entry showed up in ifconfig. This is what I expected after reading the Xen networking wiki page. My second domU is windows 7. I noticed when running ifconfig that vif2.0 entry was created, as expected. But, there is also a tap2.0 entry. Why is this created for windows and not linux? I''ve tried to look for documentation but I could not find a reference to this in the xen networking page (http://wiki.xensource.com/xenwiki/XenNetworking). Could anyone help clarify why tap2.0 is created, and why only for windows domU and not linux domU? Thanks! Julien _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Pasi Kärkkäinen
2011-Aug-27 12:28 UTC
Re: [Xen-users] TAP adapter created for windows domU but not linux?
On Fri, Aug 26, 2011 at 05:35:13PM -0500, Beasley, Julien wrote:> Hello, > > > > I have a dom0 running in SuSE. My first domU is also suse, and I noticed > after running ifconfig that a vif1.0 entry showed up in ifconfig. This is > what I expected after reading the Xen networking wiki page. My second domU > is windows 7. I noticed when running ifconfig that vif2.0 entry was > created, as expected. But, there is also a tap2.0 entry. Why is this > created for windows and not linux? I''ve tried to look for documentation > but I could not find a reference to this in the xen networking page > ([1]http://wiki.xensource.com/xenwiki/XenNetworking). Could anyone help > clarify why tap2.0 is created, and why only for windows domU and not linux > domU? >tap devices are created by Xen qemu-dm for *emulated* virtual nics, so when you run Windows as Xen HVM (fully virtualized/emulated) VM, you get realtek or intel emulated vnic in the VM, and thus you get tap device in dom0. -- Pasi _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users