An encounter with hardware offload performance for GENEVE Protocol!!
Objective: As OpenStack NFV gradually enhanced to adopt the ml2-OVN support for the FDP network, so from the telco application it is necessary to evaluate the network performance with Geneve protocol support. Hence we came up with the solution where TRex(Software Trafficgenerator) can emulate Geneve overlay encapsulated packet using VLAN outer header support and process packets using tunnel endpoint via the same broadcast domain where OpenStack compute TenantVLAN traffic is accessible. Geneve encapsulated packets directly reached the TEP interface of Compute(DUT) without redirecting the traffic via the intermediate TEP gateway host. Hence this scenario can reduce the dependencies to manage software GW host and additional packet processing time and process the faster packet to DUT as per the NFV benchmark. The solution can apply to OpenShift/FDP without Layer products if the underlying configuration matches as explained below (So far it is not tested with the OpenShift environment...