Re: [Xen-users] Multicast message handling in VMs - For Upnp server, client or forward in a VM

[Simon Hobson <linux@xxxxxxxxxxxxxxxx>]

Calmar <calmar@xxxxxxxxxxx> wrote:

> I am using xen 4.1.4 of the Debian Wheezy distribution, with network in 
> bridge mode.
> This is a brand new setup, with default setup options on the network point of 
> view.
> 
> When a multicast message (here it was Upnp) is sent from the physical 
> network, it can be seen in the eth1 and xenbr1 interfaces, but not in the 
> interfaces inside the VMs.

I think this is a known problem - the PV drivers don't support multicast unless 
things have changed in the last 2 years :
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=660882

My workaround was to give the VM needing it (to run Netatalk properly) a 
separate physical NIC with PCI passthrough.


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