[libvirt-users] Strange IPv6 Issues

[Tim Schumacher]

Hi folks,

I'm having the problem that my guests are most of the time not
reachable via IPv6 and cant connect to IPv6 hosts, but if I ping the
public IPv6-Adress of my bridge, the host can use IPv6 again. This is
for incomming and outgoing traffic.

I've attached my network xml file. 

virsh version reports this:

Compiled against library: libvirt 1.2.4
Using library: libvirt 1.2.4
Using API: QEMU 1.2.4
Running hypervisor: QEMU 2.0.0


Routing on the guest looks like this:

$ ip -6 route
2a01:4f8:200:2265:5054:ff:febe:e8e6 dev eth0  proto kernel  metric 256
fe80::/64 dev eth0  proto kernel  metric 256
default via fe80::5054:ff:fe32:e58 dev eth0  metric 1024 

Routing on the host looks like this:

$ ip -6 route
2a01:4f8:200:2265::/64 dev eth0  proto kernel  metric 256
2a01:4f8:200:2265::/64 dev virbr0  proto kernel  metric 256
fe80::/64 dev eth0  proto kernel  metric 256
fe80::/64 dev vnet0  proto kernel  metric 256
fe80::/64 dev vnet1  proto kernel  metric 256
fe80::/64 dev virbr0  proto kernel  metric 256
fe80::/64 dev vnet2  proto kernel  metric 256
fe80::/64 dev vnet3  proto kernel  metric 256
fe80::/64 dev vnet4  proto kernel  metric 256
fe80::/64 dev vnet5  proto kernel  metric 256
default via fe80::1 dev eth0  metric 1024

I'm running Debian Jessy on the host and on the guest. That means that
they all are running Kernel 3.14.

If you have any idea what could be causing this or if you need any
information please post.

Thanks for your time and help

Tim

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