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

[Jesse Gross]

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?
>> >
>> >
>
>