Regular OpenvSwitch on Xenial, strange errors... Can't add a VLAN port!

[Martinx - ジェームズ]

Guys,

 I'm trying to do a very simple thing on OpenvSwitch with Xenial but, it is
not working!

 I'm trying to do this:


http://openvswitch.org/support/config-cookbooks/vlan-configuration-cookbook/

 It fails...   :-(

---
root at blade:~# ovs-vsctl add-br br0

root at blade:~# ovs-vsctl add-port br0 tap0 tag=100
ovs-vsctl: Error detected while setting up 'tap0'.  See ovs-vswitchd log
for details.
---

---
root at blade:~# ovs-dpctl show br0
2016-05-04T16:58:49Z|00001|netdev_linux|INFO|tun0 device has unknown
hardware address family 65534
ovs-dpctl: opening datapath br0 failed (No such device)
---

But:

---
root at blade:~# lsmod | grep openvs
openvswitch            98304  2
nf_defrag_ipv6         36864  1 openvswitch
nf_conntrack          106496  6
openvswitch,nf_nat,nf_nat_ipv4,xt_conntrack,nf_nat_masquerade_ipv4,nf_conntrack_ipv4
libcrc32c              16384  1 openvswitch
---

 What's going on?

Thanks!
Thiago
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