[ovs-discuss] GTP decapsulation

[Ash Ash]

Thanks Orabuntu-LXC

I looked at the link. I am new to ovs but my understanding is whe I
use options:remote_ip=x.x.x.x in ovs-vsctl add-port command (and the option
is mandatory for gtpu type), it creates a tunnel whereas my traffic is
already tunneld/encapsulated.
In my test setup I have three VMs, vm1 connected to vm2 and vm3. There is
no direct connection between vm2 and vm3, they are using different
host-only network adapters. I want to send traffic that is tunneled already
from vm2 to vm1 to decapsulate and then send decapsulated traffic to vm3.

I found something in ovs tests:
https://github.com/openvswitch/ovs/blob/master/tests/tunnel-push-pop.at#L376,
specifically tnl_pop, But I could not find any documentation on that
action. ovs-ofctl add-flow doesn't recognize it.



On Fri, Apr 16, 2021 at 5:31 PM Orabuntu-LXC <gilbert at orabuntu-lxc.com>
wrote:

> If you are moving between interfaces between hosts, and then subsequently
> between interfaces on the SAME host you might also need to make use of OVS
> patch ports as well.
>
> HTH
>
>
> On Apr 16, 2021 at 6:33 AM, Ash Ash <m.list.acc.q at gmail.com> wrote:
>
> Hi
>
> I have some gtp pcap files which I want to decapsulate. Is that possible
> with ovs?
>
> I am trying to send those packets using tcpreplay to ovs, decap them, and
> send to another interface.
>
> I tried experimenting based on this
> https://docs.openvswitch.org/en/latest/howto/tunneling/?highlight=gre#connecting-vms-using-tunnels
> tutorial but I had no success.
>
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>
>
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