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I had the same issue. In my case, I needed to change virtual network type from local to GRE. 

That solved this problem. I saw ARP requests coming from compute node to neutron`s DHCP agent namespace.

Cheers
-- 
Nick Maslov
Sent with Airmail

On December 6, 2013 at 2:27:20 AM, Dimitri Maziuk (dmaziuk at bmrb.wisc.edu) wrote:

On 12/05/2013 05:39 PM, John Smith wrote:  
> On Thu, Dec 5, 2013 at 11:59 PM, Dimitri Maziuk <dmaziuk at bmrb.wisc.edu> wrote:  
>>  
>> I narrowed it down to no traffic between vnet0 and br100. Does anyone  
>> have any pointers for that one?  
>>  
> Its probably not the same issue, but does it look anything like this ?  
>  
> https://bugs.launchpad.net/nova/+bug/1257875  

Define "like". ;)  

I run tcpdump on vnet0, I see arp requests coming from the instance. I  
run it on br100, I don't see anything coming from the instance.  

# brctl show br100  
bridge name bridge id STP enabled interfaces  
br100 8000.003048c53032 no eth0  
vnet0  

(I think I did "brctl addif br100 vnet0" manually at some point, it  
didn't make any difference.)  

brctl showmacs does not include guest's mac.  

--  
Dimitri Maziuk  
Programmer/sysadmin  
BioMagResBank, UW-Madison -- http://www.bmrb.wisc.edu  

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