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

[Christian Ehrhardt]

Hi Thiago,
I could reproduce, but then I don't have a tap0 just as the error says.
And the command says add tap0 to br0.

This works (to give me a tap device before adding things)
sudo ip tuntap add dev tap5 mode tap
sudo ovs-vsctl add-port br0 tap5 tag=101
sudo ovs-vsctl show
24fc3972-b8c2-4c53-8299-e5ea77add3cf
    Bridge "br0"
        Port "tap5"
            tag: 101
            Interface "tap5"
[...]

Christian Ehrhardt
Software Engineer, Ubuntu Server
Canonical Ltd

On Wed, May 4, 2016 at 12:02 PM, Martinx - ジェームズ <thiagocmartinsc at gmail.com>
wrote:

>
>
> On 4 May 2016 at 13:59, Martinx - ジェームズ <thiagocmartinsc at gmail.com> wrote:
>
>> 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
>>
>
> The log:
>
> ---
> 2016-05-04T16:57:58.491Z|00007|bridge|INFO|ovs-vswitchd (Open vSwitch)
> 2.5.0
> 2016-05-04T16:58:03.005Z|00008|ofproto_dpif|INFO|system at ovs-system:
> Datapath supports recirculation
> 2016-05-04T16:58:03.005Z|00009|ofproto_dpif|INFO|system at ovs-system: MPLS
> label stack length probed as 1
> 2016-05-04T16:58:03.005Z|00010|ofproto_dpif|INFO|system at ovs-system:
> Datapath supports unique flow ids
> 2016-05-04T16:58:03.005Z|00011|ofproto_dpif|INFO|system at ovs-system:
> Datapath supports ct_state
> 2016-05-04T16:58:03.005Z|00012|ofproto_dpif|INFO|system at ovs-system:
> Datapath supports ct_zone
> 2016-05-04T16:58:03.005Z|00013|ofproto_dpif|INFO|system at ovs-system:
> Datapath supports ct_mark
> 2016-05-04T16:58:03.005Z|00014|ofproto_dpif|INFO|system at ovs-system:
> Datapath supports ct_label
> 2016-05-04T16:58:03.010Z|00001|ofproto_dpif_upcall(handler1)|INFO|received
> packet on unassociated datapath port 0
> 2016-05-04T16:58:03.043Z|00015|bridge|INFO|bridge br0: added interface br0
> on port 65534
> 2016-05-04T16:58:03.044Z|00016|bridge|INFO|bridge br0: using datapath ID
> 0000bebee71ce947
> 2016-05-04T16:58:03.044Z|00017|connmgr|INFO|br0: added service controller
> "punix:/var/run/openvswitch/br0.mgmt"
> 2016-05-04T16:58:08.491Z|00018|memory|INFO|33540 kB peak resident set size
> after 10.1 seconds
> 2016-05-04T16:58:08.491Z|00019|memory|INFO|handlers:1 ports:1
> revalidators:1 rules:5
> 2016-05-04T16:58:14.894Z|00020|bridge|WARN|could not open network device
> tap0 (No such device)
> ---
>
> ;-(
>
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