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

[Kris zhang]

Thanks Jesse, I solved this issue through upgrade the NIC driver igb from
2.1 to 2.4, now it is ok even if use Linux bond as the external port of ovs
bridge. And i will try to use OVS bonding once i have a chance. Also i hope
FAQ can list which NIC driver has vlan problem, and should be upgrade to
which version.

Thanks,
Kris


On Thu, May 30, 2013 at 7:22 AM, Jesse Gross <jesse at nicira.com> wrote:

> 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?
> >>> >> >
> >>> >> >
> >>> >
> >>> >
> >>
> >>
> >
>
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