openvswitch vlan_mode and native vlans

[anton]

Hi,

i have instance network interface configured like this:

gnt-instance modify --net 0:vlan=.29:10:20:30 instance

...
  NICs:

    - nic/0:

      MAC: aa:00:00:4c:22:e2

      IP: None

      mode: openvswitch

      link: switch0

      vlan: .29:10:20:30

      network: None

      UUID: e2b0ada7-6904-4062-bc43-0c0e9cfb8868

      name: None
...

so, i'm expecting vlan_mode=native-untagged on corresponding tap interface, but vlan_mode is clear and traffic does not pass through interface... 

ovs-vsctl list port tap5

_uuid               : cea62234-6777-4787-8307-d0fedaa7514d

bond_downdelay      : 0

bond_fake_iface     : false

bond_mode           : []

bond_updelay        : 0

external_ids        : {}

fake_bridge         : false

interfaces          : [51b4b9df-4a10-420c-9a9d-3a619642e81d]

lacp                : []

mac                 : []

name                : "tap5"

other_config        : {}

qos                 : []

statistics          : {}

status              : {}

tag                 : 29

trunks              : [10, 20, 30]

vlan_mode           : []

what i do wrong? ))

Thanks a lot

[candlerb]

You'll need to include:

* ganeti version

* openvswitch version

* OS version

...if you want anyone to be able to reproduce this or fix it.

Looking at the ovs documentation, I agree with you:

http://openvswitch.org/ovs-vswitchd.conf.db.5.pdf

If vlan_mode is blank then it will default to "access" or "trunk". It's not 100% clear which it will choose in your case, i.e. when both "tag" and "trunks" are non-empty.

I also agree that "native-untagged" is what you want.

Can I suggest you try manually changing the port to "native-untagged" and see if traffic flows over both untagged and tagged VLANs. If so then you can raise a ticket to get it fixed.

Alternatively, see if you can make a patch yourself. I see code in both lib/backend.py (ConfigureOVS, which only adds ports), and in tools/net-common.in:

    # From gnt-instance man page vlan should be either .VLAN_ID or VLAN_ID

    ACPORT=${VLAN%%:*}  # remove any trunk info

    [ -n "$ACPORT" ] && ovs-vsctl set port $INTERFACE tag=${ACPORT#.}

    # Set up trunk port

    # From gnt-instance man page vlan should be :VLAN_ID[:VLAN_ID2..]

    TRUNKS=${VLAN#.*:}  # remove any access info

    [ -n "$TRUNKS" ] && ovs-vsctl set port $INTERFACE trunks=${TRUNKS//:/,}

I think this looks to be the place you'd set the mode if both ACPORT and TRUNKS are set.

Regards,

Brian.