Open Stack

On 7 July 2015 at 20:51, Martinx - ジェームズ <thiagocmartinsc at gmail.com> wrote:

> Guys,
>
> I have an "all-in-one" OpenStack Juno setup, with LinuxBridges, where I'm
> planning to use it with two tagged networks.
>
> Like this:
>
> For "Instance #1", "brctl show" returns:
>
> ----
> root at openstack-1:~# brctl show
> bridge name     bridge id               STP enabled     interfaces
>
> brqfac384d5-cd          8000.ecf4bbd0417a       no              eth2.100
>
> tap47417a6d-3b
> ----
>
> For "Instance #2", "brctl show" returns:
>
> ----
> bridge name     bridge id               STP enabled     interfaces
>
> brq50721b16-1c          8000.ecf4bbd0417a       no              eth2.101
>
>  tap15f2960f-54
> ----
>
> "Instance #1" works as expected, I can see the the packets arriving inside
> the Instance attached to the TAP "tap15f2960f-54".
>
> Also, I can run "tcpdump -c 100 -eni tap15f2960f-54" or "tcpdump -c 100
> -eni brq50721b16-1c" to see the packets.
>
> BUT, my second "Instance #2" doesn't receive the packets!!
>
>
> # "Wire"
>
> If I run "tcpdump -c 100 -eni eth2", I can see both "vlan 100" and "vlan
> 101" packets arriving.
>
> # vlan 100 - okay
> If I run "tcpdump -c 100 -eni brqfac384d5-cd", as I said before, I can see
> the packets.
>
> If I run "tcpdump -c 100 -eni tap47417a6d-3b", as I said before, I can see
> the packets.
>
> # vlan 101 - not okay
> If I run "tcpdump -c 100 -eni brq50721b16-1c", I can see the packets.
>
> If I run "tcpdump -c 100 -eni tap15f2960f-54", BOOM! I am unable to see
> the packets!!
>
> --
>
>
> Why the packets are being dropped between "brq50721b16-1c" and
> "tap15f2960f-54" ???
>
> "ifconfig tap15f2960f-54" shows packets being dropped.
>
> "ifconfig tap47417a6d-3b" shows 0 packets being dropped.
>
>
> I already double checked everything!! Also, I tried to raise txqueue,
> checked ebtabled, iptables... I have no clue about whats going on here...
>
> I really appreciate any help!
>
> Thanks!
> Thiago
>

BTW, the symptoms are weird... After a reboot (and starting the Intance #2
with bigger txqueue from the beginning), I'm not seeing the packets being
dropped @ the tap interface but, they to not arrive anyway...

I would love to know what can cause the packets arriving the "brqXXX-yy"
interface but not its "tapXXX-YY"... Very weird...

Thanks in advance!
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