[ovs-dev] OVS Userspace: Usecase with multiple vxlan tunnels

William Tu u9012063 at gmail.com
Wed May 6 19:44:19 UTC 2020


On Sun, May 03, 2020 at 11:12:04PM -0400, Vasu Dasari wrote:
> Hi,
> 
> I am trying a userspace vxlan test case scenario as follows. ap0, fp0, ap1
> and fp1 are namespaces where in packets from ap0 are sent to fp0 over vxlan
> tunnel and packets from ap1 to fp1 are sent over second vxlan tunnel. And
> br0 for the bridge is handling ARP, route, etc. Note that br0 has two
> addresses on assigned to it.
> 
> On executing the script with following command:
> sudo make -s -C _build-gcc/ check-system-userspace TESTSUITEFLAGS='-k
> "modified ping over vxlan tunnel"'
> 
> I see that OVS times out and leaving behind br0 and ovs-netdev interfaces.
> But, if I comment out the one of the addresses on br0 at least the script
> will be successful but the ping on second tunnel will not be successful.
> 
> My question is:
> 1. Is this use case supported in userspace OVS mode?
> 2. Am I missing something in configuration?
> 
> Thanks
> -Vasu
> 
> 
>               +------+
>    +---+      |      |      +---+
>    |ap0+------+      +------+fp0|
>    +---+      |      |      +---+
>               | ovs  |
>    +---+      | br0  |      +---+
>    |ap1+------+      +------+fp1|
>    +---+      |      |      +---+
>               +------+
> 
> 
> 

We usually have an underlay bridage and overlay bridge.
And the vxlan device is attached to the overlay, and the
underlay bridge has the outer ip assigned.
William


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