This patch is the meat of the feature, and I think it could be as well
implemented without patch 1/2 in the series. I agree with this particular
patch, (assuming we adjust documentation to talk about `VXLAN mode`,
capitalized). But I also have some reservations about patch 1/2 in the
series (or at
Commit [1] introduced a "vxlan mode" concept. It brought a limitation
for available tunnel IDs because of lack of space in VXLAN VNI.
In vxlan mode OVN is limited by 4095 datapaths (LRs or non-transit LSs)
and 2047 logical switch ports per datapath.
Prior to this patch vxlan mode was enabled auto
