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

zhouzhihong at cmss.chinamobile.com zhouzhihong at cmss.chinamobile.com
Fri May 26 04:28:39 UTC 2017


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" 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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