Re: Domain XML Multicast Tunnel

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Sat, Nov 30, 2019 at 03:59:54PM +0000, Richard M wrote:
> Hello
> I found under networking in the Domain XML 'Multcast tunnel'.
> My question is does anyone know what is the intended use of multicast
> tunnel networking?What are the potential pitfalls of using such a
> configuration other than what's highlighted in the domain xml. eg:
> can it suffer from throughput issues? Can the tunnel be accessed from
> outside Libvirt?
> I'm struggling to find any information about it. If anyone has any
> information about it, Or where I can obtain such information it would
> be appreciated.

This is something that has been supported by QEMU forever, but I think
it is fair to say it is rarely used.

The main use case would be setting up network communication between
a group in QEMU instances (possibly across hosts) in a case where you
don't have access to any better technology such as tap device + bridging.
eg if you are an unprivileged user & cannot get root.

I doubt performance is going to be anything special. There's also
no meaningful security - any user or process or host can send &
receive on the same multicast address.


Regards,
Daniel
-- 
|: https://berrange.com      -o-    https://www.flickr.com/photos/dberrange :|
|: https://libvirt.org         -o-            https://fstop138.berrange.com :|
|: https://entangle-photo.org    -o-    https://www.instagram.com/dberrange :|

_______________________________________________
libvirt-users mailing list
libvirt-users@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/libvirt-users




[Index of Archives]     [Virt Tools]     [Lib OS Info]     [Fedora Users]     [Fedora Desktop]     [Fedora SELinux]     [Yosemite News]     [KDE Users]

  Powered by Linux