[ovs-discuss] Adding a new vlan will caused the host lost connection

[Jesse Gross]

Linux bonds don't pass vlan information through to the driver. If you
use OVS bonding then you shouldn't have this problem.

On Wed, May 29, 2013 at 11:08 AM, Kris zhang <zhang.kris at gmail.com> wrote:
> I found the reason, the problem is not caused by vlan splinters, it caused
> by bond0. I don't know why, but if remove the bond0, and ovs-br0 directly
> connect to eth0, the problem disappears.
>
>
>
>
> On Mon, May 27, 2013 at 10:10 AM, Kris zhang <zhang.kris at gmail.com> wrote:
>>
>> Hi Jesse,
>>
>> Because if i don't use the vlan splinters, the VMs' network traffic will
>> be nearly 0 M/s (but they can ping each other). I read FAQ, it says the
>> reason maybe the NIC driver or Linux kernel version problems, and it also
>> says the vlan splinters may solve this issue, but they don't said the ping
>> will miss some packets when add a new vlan. is it a bug for vlan splinters?
>> Please see the images in the attachment.
>>
>> Thanks,
>> Kris
>>
>>
>> On Thu, May 23, 2013 at 11:25 PM, Jesse Gross <jesse at nicira.com> wrote:
>>>
>>> It seems that the original issue was that you were using VLANs when
>>> you shouldn't have. In that case, why are you trying to use VLAN
>>> splinters?
>>>
>>> On Thu, May 23, 2013 at 2:44 AM, Kris zhang <zhang.kris at gmail.com> wrote:
>>> > Thanks Jesse, but i still cannot fix my issue. Because if i use vlan
>>> > splinters, the above issue will be happened, if i don't use vlan
>>> > splinters,
>>> > the packets between the VMs are very slow (ping is ok), i use ovs-dpctl
>>> > dump-flows br0, get the following result:
>>> >
>>> >
>>> > in_port(1),eth(src=c6:b0:ea:37:29:47,dst=c6:b0:3a:c0:0d:55),eth_type(0x8100),vlan(vid=3000,pcp=0),encap(eth_type(0x0800),ipv4(src=20.1.120.12,dst=20.1.120.13,proto=1,tos=1,ttl=64,frag=no),icmp(type=8,code=0)),
>>> > packets:101, bytes:10302, used:4.341s, actions=pop_vlan,3
>>> >
>>> > in_port(3),eth(src=c6:b0:3a:c0:0d:55,dst=c6:b0:ea:37:29:47),eth_type(0x0800),ipv4(src=20.1.120.13,dst=20.1.120.12,proto=1,tos=0,ttl=64,frag=no),icmp(type=0,code=0)),
>>> > packets:101, bytes:9898, used:4.341s,
>>> > actions=push_vlan(vid=3000,pcp=0),1
>>> >
>>> > The port 1 is eth1, and the port 3 is the tap of VM.
>>> > Does the iptables affect the ovs? If not, i have to upgrade the linux
>>> > kernel, or upgrade NIC driver.
>>> >
>>> > Thanks,
>>> > Kris
>>> >
>>> >
>>> >
>>> >
>>> > On Tue, May 21, 2013 at 3:32 AM, Jesse Gross <jesse at nicira.com> wrote:
>>> >>
>>> >> There's an extensive section in the FAQ about vlans that I would
>>> >> recommend reading.
>>> >>
>>> >> On Mon, May 20, 2013 at 8:51 AM, Kris zhang <zhang.kris at gmail.com>
>>> >> wrote:
>>> >> > No, so you mean it maybe not caused by vlan splinters?
>>> >> >
>>> >> >
>>> >> > On Mon, May 20, 2013 at 11:18 PM, Jesse Gross <jesse at nicira.com>
>>> >> > wrote:
>>> >> >>
>>> >> >> On Mon, May 20, 2013 at 4:37 AM, Kris zhang <zhang.kris at gmail.com>
>>> >> >> wrote:
>>> >> >> > Hi guys,
>>> >> >> >
>>> >> >> > I use ovs-1.7.1, and i run ovs on a single NIC host (CentOS):
>>> >> >> >
>>> >> >> > # ovs-vsctl add-br br0
>>> >> >> > # ovs-vsctl add-port br0 eth0
>>> >> >> >
>>> >> >> > Then i setup the eth0 interface's other_config:
>>> >> >> > enable-vlan-splinters="true".
>>> >> >> >
>>> >> >> > Last I ping this host by another PC, and at same time i do this:
>>> >> >> >
>>> >> >> > # ovs-vsctl add-port taptest br0 tag=100
>>> >> >> >
>>> >> >> > I found there are 4 "Request timed out." happened. That means the
>>> >> >> > host
>>> >> >> > lost
>>> >> >> > connect about 4 seconds.
>>> >> >> >
>>> >> >> > If i remove the vlan splinters on interface eth0. it won't
>>> >> >> > happen.
>>> >> >> > So does anybody know the reason?
>>> >> >>
>>> >> >> Is the other machine actually on that VLAN?
>>> >> >
>>> >> >
>>> >
>>> >
>>
>>
>