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Hi Maxiao:


Thanks for your reply.
This flow indeed been updated, when ovs receive any packets sent from migrated vm. The flow in table10(br-tun) is used to learn the mac address, and put the learned flow into table20. It just takes longer to complete. 
And is there any way to update the flow faster? thanks!


jingting
From:  "Xiao Ma (xima2)"<xima2 at cisco.com>;
Date:  Wed, Feb 17, 2016 07:10 PM
To:  "OpenStack Development Mailing List (not for usage questions)"<openstack-dev at lists.openstack.org>; 

Subject:  Re: [openstack-dev] [neutron] [ovs] How to update flows inbr-tun	proactively

 
 Hi, JingTing
 
 
 The flow should be updated after the rarp broadcast packet be send by qemu.
 So I think you should make sure whether the broadcast packet has been send and received by the host.
 
 
 
 
 Best regards,
 
   Xiao Ma (xima2 at cisco.com)
 马啸
 SDN Architect & OpenStack specialist
 Hybrid Cloud 
 Cisco System (China)
 Mobile: (+86) 18911219332
 
 
 
 
 
 
 
   在 2016年2月17日，下午3:57，康敬亭 <jingting at unitedstack.com> 写道：
 
  Hi guys:
    
 The bug has be reported on  https://bugs.launchpad.net/neutron/+bug/1541738
     
 The flow in br-tun as below is generated by learning flow, and not updated immediately after vm live migration.
 
 
 Original flow:
 cookie=0x0, duration=194.884s, table=20, n_packets=0, n_bytes=0, hard_timeout=300, idle_age=194, priority=1,vlan_tci=0x0306/0x0fff,dl_dst=5a:c6:4f:34:61:06  actions=load:0->NXM_OF_VLAN_TCI[],load:0x1ef->NXM_NX_TUN_ID[],output:24
   
 Updated flow:
 cookie=0x0, duration=194.884s, table=20, n_packets=0, n_bytes=0, hard_timeout=300, idle_age=194, priority=1,vlan_tci=0x0306/0x0fff,dl_dst=5a:c6:4f:34:61:06  actions=load:0->NXM_OF_VLAN_TCI[],load:0x1ef->NXM_NX_TUN_ID[],output:26
 
 
 Anyone has idea how to update this flow proactively.thanks!
   
 jingting
 
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