[libvirt-users] UDP unicast network backend (QEMU)

[Michal Privoznik]

On 04.08.2015 06:48, Stanley Karunditu wrote:
> In 2012 QEMU added UDP unicast network backend support
> 
> https://github.com/qemu/qemu/commit/0e0e7facc775e9bb020314f48751b3d09f316c8b#diff-a0a1810b6e249e68f1a290e37399becb
> 
> Checked latest libvirt on the git repo,  and didn't see this as an option.
> 
> So tried to use the mcast tunnel mode. I keep getting duplicate packets
> with BPDUs and LLDP packets going between the Point to point connection
> between the VMs.  VMs have bridges on them. When I used the TCP tunnel
> interface, if the client came up before the server end, the connection
> failed to establish. So both methods not super reliable.
> 
> If I manually change the netdev settings to use unicast udp tunneling the
> connection is way more stable just like the GNS3 connections.
> 
> Has anyone written support for UDP unicast network backend for QEMU and the
> patch is awaiting review?
> 
> Searched mailing list and couldn't find a bug covering this.
> 
> Just want to be sure no one has worked on this before creating a patch to
> add this support.
> 

Yeah, I haven't seen such patch yet. I think you're good to go.

Michal