[libvirt] macvtap - no incoming ipv6 traffic processed on kvm host unless i start tcpdump on interface

[Michal Privoznik]

On 09.04.2015 10:50, Stefan Bauer wrote:
> On Thu, 2015-04-09 at 10:47 +0200, Michal Privoznik wrote:
> 
>> Ah, so that's not the bug then. Have you perhaps changed the vNIC MAC
>> inside the guest after it was started? Even though libvirt will nowadays
>> adapt to such change, older version of libvirt haven't this implemented
>> causing guest connectivity to break.
> 
> 
> Nope. I only changed the nic mode from bridged to macvtap bridged mode
> but always followed by a shutdown / start of the VM.
> Anyway it's only an ipv6 problem - i do not have this problem with ipv4!

Maybe a firewall problem? Anything interesting in iptables/ebtables output?

Michal