[ovs-discuss] OVN - VLAN packet duplicate processing on egress pipeline

Anil Venkata anilvenkata at redhat.com
Mon Jul 23 12:03:22 UTC 2018


Packets destined for VLAN remote logical ports are sent out through
physical table 65 rather than physical table 32 (Geneve remote logical
ports are sent through table 32). I found below description in ovn
architecture documentation.

http://www.openvswitch.org//support/dist-docs/ovn-architecture.7.html

A  special  case  is  that  when a localnet port exists on the
datapath, remote port is connected by switching to the  local‐
net  port.  In this case, instead of adding a flow in table 32
to reach the remote port, a flow  is  added  in  table  33  to
switch  the logical outport to the localnet port, and resubmit
to table 33 as if it were unicasted to a logical port  on  the
local hypervisor.


Any reason for this decision. Because of this, packet is redundantly
processed in logical switch's egress pipeline on both local and remote
hypervisors.

Thanks
Anil
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