[ovs-discuss] Flooding of packets destined to OVS port's mac address

Gurucharan Shetty shettyg at nicira.com
Thu Jul 16 18:18:19 UTC 2015


I don't know the answer, but some of your mac addresses have multi-cast bit
enabled. So I wonder whether that is the problem.

On Wed, Jul 15, 2015 at 12:18 PM, Pujar, Shyam (Nokia - IN/Bangalore) <
shyam.pujar at nokia.com> wrote:

>  Hi ,
>         Please find setup and testing procedure below.
>
>
>
>    1. In the above setup, Client Program tries to send packet with
>    src_mac: 3:3:3:3:3:3  and dst_mac: 1:1:1:1:1:1.
>    2. Packet is flood to port tap2.
>    3. Why does OVS flood packets when dst_mac received is its own port’s
>    mac address.
>    4. As it forwards to other ports, there is no one to reply for dst_mac
>    other than OVS bridge itself.
>    5. Where as in case of Linux bridge, packet is not flooded to other
>    ports. Instead packet is dropped.
>
>
> Could you please tell me how do switches in real work? As per my
> understanding there should be static entries in forwarding table of switch
> for its own mac addresses.
> And default action should be present for it.
>
>
> Regards,
> Shyam
>
>
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