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Since you are using vxlan tunnel, have you increased the MTU on all
compute nodes and network node to accommodate the vxlan tunnel
packets?<br>
<br>
<a class="moz-txt-link-freetext" href="http://docs.openstack.org/juno/config-reference/content/networking-options-plugins-ml2.html">http://docs.openstack.org/juno/config-reference/content/networking-options-plugins-ml2.html</a><br>
<br>
<div class="moz-cite-prefix">On 07/08/2015 05:41 PM, Martinx - ジェームズ
wrote:<br>
</div>
<blockquote
cite="mid:CAJSM8J1G=ejT4jNxCpq1aT6dv3fucKT1RZgZpyF3ZCmwMfuRKQ@mail.gmail.com"
type="cite">
<div dir="ltr">Guys,
<div><br>
</div>
<div> What can cause packets to just disappear after arriving
the bridge "brqxxxxzzzz-yy" ???</div>
<div><br>
</div>
<div> I'm using "VLAN Provider Networks", Juno on top of Trusty.</div>
<div><br>
</div>
<div> With Neutron ML2 + LinuxBridges, setup "all-in-one".</div>
<div><br>
</div>
<div><br>
</div>
<div>Where:</div>
<div><br>
</div>
<div> - eth0 is the default - api, etc;</div>
<div> - eth1 is the "external" - floating ip, etc;</div>
<div> - eth2 is the physical vlan mapped into ML2;</div>
<div> - eth3 is another physical vlan mapped into ML2;</div>
<div> - dummy0 is being used by ML2 for VXLAN.</div>
<div><br>
</div>
<div><br>
</div>
<div>Explaining:</div>
<div><br>
</div>
<div><br>
</div>
<div> * I can see the tagged packets arriving at "eth3", by
using "tcpdump -eni eth2 | grep "vlan 666";<br>
</div>
<div><br>
</div>
<div> * I can see the untagged packets arriving at
"brq50b13311-fa", by using "tcpdump -eni brq50b13311-fa";</div>
<div><br>
</div>
<div> * I CAN NOT see the untagged packets arriving at
"tap9a546be0-d6", by using "tcpdump -eni tap9a546be0-d6"!</div>
<div><br>
</div>
<div><br>
</div>
<div> "tcpdump -eni tap9a546be0-d6" only shows "alien" packets
for this "tap", like this:</div>
<div><br>
</div>
<div> - While what is arriving at "brq50b13311-fa" looks
completely different!<br>
</div>
<div><br>
</div>
<div> For example, I can not see the string "Cisco" while
running "tcpdump -eni brq50b13311-fa | grep -i cisco", so,
where those packets come from (that I'm seeing on
tap9a546be0-d6 and within its instance - pastebin above) ???</div>
<div><br>
</div>
<div><br>
</div>
<div>Instance details:</div>
<div>---</div>
<div>...</div>
<div>
<div> <interface type='bridge'></div>
<div> <mac address='fa:16:3e:51:16:60'/></div>
<div> <source bridge='brq50b13311-fa'/></div>
<div> <target dev='tap9a546be0-d6'/></div>
<div> <model type='e1000'/></div>
<div> <address type='pci' domain='0x0000' bus='0x00'
slot='0x06' function='0x0'/></div>
<div> </interface></div>
</div>
<div>...</div>
<div>---</div>
<div><br>
</div>
<div>"brctl show" returns:</div>
<div><br>
</div>
<div>---</div>
<div>
<div>bridge name bridge id STP
enabled interfaces</div>
</div>
<div>....</div>
<div>
<div>brq50b13311-fa 8000.ecf4bbd0417b no
eth3.666</div>
<div>
tap9a546be0-d6</div>
</div>
<div>....</div>
<div>---</div>
<div><br>
</div>
<div>"neutron net-show XXX" returns:</div>
<div><br>
</div>
<div> <a moz-do-not-send="true"
href="http://paste.openstack.org/show/356845/">http://paste.openstack.org/show/356845/</a><br>
</div>
<div><br>
</div>
<div>-</div>
<div><br>
</div>
<div>ML2 configuration contains:</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div>-</div>
<div><br>
</div>
<div> Can someone please, tell me, why ~99.5% of the packets are
disappearing out of nothing?</div>
<div><br>
</div>
<div> What is driving me crazy is that, on top of this very same
setup (including e1000 driver), but with different vlan tag,
it works!</div>
<div><br>
</div>
<div> I already disabled "rp_filter", ebtables, arptables,
iptables, also, all files under "/proc/sys/net/bridge" have
"0"...</div>
<div><br>
</div>
<div> I really appreciate any help! I'm working on this for
about 16 hours straight...</div>
<div><br>
</div>
<div>Thanks,</div>
<div>Thiago</div>
</div>
<br>
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</blockquote>
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