[ovs-discuss] Meter tables

Ben Pfaff blp at ovn.org
Fri Aug 23 01:47:16 UTC 2019


Policing is very limited.  It operates all-or-nothing on all the packets
arriving at an interface.  There is no opportunity to parse the packet
and distinguish between VLANs or other fields.

You can do a form of QoS with meters, perhaps satisfying the rates that
you mention, but it operates on the packets transmitted to an interface,
not on the packets received on one.

On Thu, Aug 22, 2019 at 09:42:32AM +0530, V Sai Surya Laxman Rao Bellala wrote:
> Hello sir,
> 
> 
>    - I am very new to Openvswitch and chose it as MTech project in my final
>    year. So I am stuck at the initial stages.
>    - As I told we are planning to send two VLAN ID to the interface and as
>    you said it is not feasible. We dropped the idea.
>    - Now we are thinking to send the one VLAN ID to the interface and with
>    the packets containing different priorities and apply policers.I don't know
>    whether it is feasible or not.
>    - I thought we can apply meters or not.
> 
> *Current idea:*
> 
>    - Use the packet generator to send packets to interface with the one
>    VLAN ID 100.
>    - Generate some packets with priority 1 and priority 0.
>    - Assume that the interface can support 100Mbps without any packet drop
>    due to congestion.
>    - Assume that priority0 packets are coming to the interface at the rate
>    of 60Mbps. I want to make it 50Mbps.
>    - Assume that priority1 packets are coming to the interface at the rate
>    of 70Mbps.I want to make it 50Mbps.
> 
> This is the thought I got sir, whether it is correct or not I want to know.
> Sorry for the inconvenience caused.
> 
> Waiting for your reply.
> 
> Regards
> Laxman
> 
> 
> 
> On Wed, Aug 21, 2019 at 11:24 PM Ben Pfaff <blp at ovn.org> wrote:
> 
> > On Mon, Aug 19, 2019 at 10:45:07AM +0530, V Sai Surya Laxman Rao Bellala
> > wrote:
> > > Can anyone explain what are the advantages of meter tables?
> >
> > They allow you to use meters.
> >
> > Probably that is not your real question, but I don't know what your real
> > question is.  What do you really want to know?
> >


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