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Hi,

yes we test it w/o DVR and it runs performant, no problems.

We doublechecked the configuration and think its configured as suggested.

On more thing; 
changing the mac-aging-timer for example to 30 seconds leads to performance problem after exactly 30 seconds (instead of default 300 secs).

Any hint?

Thanks,
Matthias


-----Original Message-----
From: Somanchi Trinath [mailto:trinath.somanchi at freescale.com] 
Sent: Thursday, May 14, 2015 7:20 AM
To: Backhausen, Matthias; openstack at lists.openstack.org
Subject: RE: [Neutron] DVR - mac-addr on br-int times out - bug ?

Hi,

I have some initial thoughts on this.

[1] Did you test the traffic without DVR ?

[2] I have this Google Doc, https://docs.google.com/document/d/1iXMAyVMf42FTahExmGdYNGOBFyeA4e74sAO3pvr_RjA/edit which can explain the setup. Is the setup and l3 agent configuration as suggested ? Can you recheck the same.

-----Original Message-----
From: Backhausen, Matthias [mailto:matthias.backhausen at ts.fujitsu.com] 
Sent: Wednesday, May 13, 2015 6:50 PM
To: openstack at lists.openstack.org
Subject: [Openstack] [Neutron] DVR - mac-addr on br-int times out - bug ?

Hi,

we did some performance tests with DVR and run into an issue we think its a bug, but I couldnt read sth similar about it.
Would be great someone could comment. Could not imagine this isn't catched yet.

Scenario: 
2 VMs of same tenant but in different subnets talk to each other. The traffic flow is ...

Traffic VM1 to VM2: 
========= CN1 ====================		 ======== CN2 ===========
VM1--->br-int--->Router--->br-int--->br-tun---------->br-tun--->br-int--->VM2

Traffic VM2 to VM1:
========= CN2 ====================		======== CN1 ===========
VM2--->br-int--->Router--->br-int---br-tun----------->br-tun--->br-int--->VM1

This works as designed; however obviously br-int of CN1 never gets traffic from Router of CN1 (except the very first ARP response), same for br-int of CN2. This leads to mac timeout on br-int after 300 secs and degrades performance massively.

Thanks,
Matthias





 

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