[openstack-dev] [neutron]VM packet lost on qbr bridge

Kevin Benton kevin at benton.pub
Fri May 26 08:32:46 UTC 2017

Is it being dropped by iptables? Check the following:

* Your VM using the correct IPv6 address assigned to it by Neutron
* The security group associated with the port allows outbound IPv6 traffic
* ensure bridge-nf-call-ip6tables is set to 1 in the kernel of the compute

On Thu, May 25, 2017 at 9:28 PM, zhouzhihong at cmss.chinamobile.com <
zhouzhihong at cmss.chinamobile.com> wrote:

> Hi All,
> I met a problem of dns packet lost in openstack environment. I need help.
> The problem desc:
> In the vm, I use "curl http://www.baidu.com" <http://www.baidu.com> to do
> test. And the cmd takes almost 5 seconds return.
> So I use tcpdump to capture the packets. And found a dns packet lost which
> is AAAA packet for ipv6.
> The packet-lost-on-qbr.zip are the captured packets which is from qbr to
> qvb. It clearly shows the lost packet.
> In my another openstack environment, the problem can not occur.  The qbr-no-packet-lost.zip
> is the captured packets.
> Thanks
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