[Openstack] 99.5% of packets are disappearing somewhere between the Linux Bridge (brqxxxxzzzz-yy) and the tap (tapxxxxzzzz-yy).

Martinx - ジェームズ thiagocmartinsc at gmail.com
Fri Jul 10 01:55:26 UTC 2015


Kevin, do you think the L2 Population can interfere with non-VXLAN networks
as well?

I'll try to disable it. And enable vni_group instead, what do you think?

I'm not seeing "l2 pop" having effect on my "VLAN Provider Networks" but, I
can be wrong, I'm not sure...

Thanks for the tip!

On 9 July 2015 at 00:43, Kevin Benton <blak111 at gmail.com> wrote:

> I wonder if l2 population is interferring. Can you try disabling l2
> population on the agent side so forwarding entries aren't being setup and
> see if the issue persists?
> On Jul 8, 2015 8:20 PM, "Martinx - ジェームズ" <thiagocmartinsc at gmail.com>
> wrote:
>
>> On 8 July 2015 at 22:50, Jerry Zhao <xyzjerry at gmail.com> wrote:
>>
>>>  Since you are using vxlan tunnel, have you increased the MTU on all
>>> compute nodes and network node to accommodate the vxlan tunnel packets?
>>>
>>>
>>> http://docs.openstack.org/juno/config-reference/content/networking-options-plugins-ml2.html
>>>
>>
>> Yes, all my VXLAN networks have MTU=1450.
>>
>> I'm not seeing *any problems* with my VXLAN networks.
>>
>> My problem lies exclusively within the "VLAN Provider Networks" / related
>> Neutron LinuxBridges.
>>
>> I'm attaching my Instances directly to a physical network of the Compute
>> Node itself (1 tagged VLAN for each Instance). But, it doesn't work as
>> expected.
>>
>> Thanks!
>>
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