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[mhhli <1777594@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

When I install openstack(queens) with kolla-ansible ,I open the neutron-dvr. But, I find some VM with floating ip can not arrived. I tryed to ping the fip and collect icmp packages with tcpdump. I find in qrouter namespace, the rfp interface can get the packages. But the qr interface cannot get. I find there is an DNAT rules in iptables rules. 
Last, I find the centos kernel version is "CentOS Linux (3.10.0-862.el7.x86_64) 7 (Core)", but some other(can ping) is "CentOS Linux (3.10.0-693.21.1.el7.x86_64) 7 (Core)". When I change kernel version to 693, it works.
I don't know how the packages changes in kernel, so I try to get help here.
Thanks.

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1777594

Title:
  centos kernel 3.10.0-862 with dvr fip cannot arrived

Status in neutron:
  New

Bug description:
  When I install openstack(queens) with kolla-ansible ,I open the neutron-dvr. But, I find some VM with floating ip can not arrived. I tryed to ping the fip and collect icmp packages with tcpdump. I find in qrouter namespace, the rfp interface can get the packages. But the qr interface cannot get. I find there is an DNAT rules in iptables rules. 
  Last, I find the centos kernel version is "CentOS Linux (3.10.0-862.el7.x86_64) 7 (Core)", but some other(can ping) is "CentOS Linux (3.10.0-693.21.1.el7.x86_64) 7 (Core)". When I change kernel version to 693, it works.
  I don't know how the packages changes in kernel, so I try to get help here.
  Thanks.

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