OVN external port range question on line 40

ovn_config.sh

ovn-nbctl ls-add sw0
ovn-nbctl lsp-add sw0 sw0-port1
ovn-nbctl lsp-set-addresses sw0-port1 "50:54:00:00:00:03 10.0.0.3"

ovn-nbctl ls-add public

# Create a logical router
ovn-nbctl lr-add lr0
ovn-nbctl lrp-add lr0 lr0-sw0 00:00:00:00:ff:01 10.0.0.1/24
ovn-nbctl lsp-add sw0 sw0-lr0
ovn-nbctl lsp-set-type sw0-lr0 router
ovn-nbctl lsp-set-addresses sw0-lr0 router
ovn-nbctl lsp-set-options sw0-lr0 router-port=lr0-sw0

ovn-nbctl lrp-add lr0 lr0-public 00:00:20:20:12:13 172.16.0.100/24
ovn-nbctl lsp-add public public-lr0
ovn-nbctl lsp-set-type public-lr0 router
ovn-nbctl lsp-set-addresses public-lr0 router
ovn-nbctl lsp-set-options public-lr0 router-port=lr0-public

# localnet port
ovn-nbctl lsp-add public ln-public
ovn-nbctl lsp-set-type ln-public localnet
ovn-nbctl lsp-set-addresses ln-public unknown
ovn-nbctl lsp-set-options ln-public network_name=public

# schedule the gw router port to a chassis.
ovn-nbctl lrp-set-gateway-chassis lr0-public ovn-gw-1 20

ovn-nbctl --portrange lr-nat-add lr0 dnat_and_snat 172.16.0.110 10.0.0.3 sw0-port1 30:54:00:00:00:03 8080-8082

# Generated logical flow
cat <<EOT >/dev/null

Generated logical flow:

[root@ovn-central /]# sudo ovn-sbctl dump-flows lr0 | grep -i -e 'ct_' -e 'nat'
  table=5 (lr_in_unsnat       ), priority=100  , match=(ip && ip4.dst == 172.16.0.110 && inport == "lr0-public"), action=(ct_snat;)
  table=5 (lr_in_unsnat       ), priority=0    , match=(1), action=(next;)
  table=6 (lr_in_dnat         ), priority=100  , match=(ip && ip4.dst == 172.16.0.110 && inport == "lr0-public"), action=(ct_dnat(10.0.0.3,8080-8082);)
  table=6 (lr_in_dnat         ), priority=0    , match=(1), action=(next;)
  table=0 (lr_out_undnat      ), priority=100  , match=(ip && ip4.src == 10.0.0.3 && outport == "lr0-public"), action=(eth.src = 30:54:00:00:00:03; ct_dnat;)
  table=0 (lr_out_undnat      ), priority=0    , match=(1), action=(next;)
  table=1 (lr_out_snat        ), priority=120  , match=(nd_ns), action=(next;)
  table=1 (lr_out_snat        ), priority=33   , match=(ip && ip4.src == 10.0.0.3 && outport == "lr0-public"), action=(eth.src = 30:54:00:00:00:03; ct_snat(172.16.0.110,8080-8082);)
  table=1 (lr_out_snat        ), priority=0    , match=(1), action=(next;)
  table=2 (lr_out_egr_loop    ), priority=100  , match=(ip4.dst == 172.16.0.110 && outport == "lr0-public" && is_chassis_resident("sw0-port1")), action=(clone { ct_clear; inport = outport; outport = ""; flags = 0; flags.loopback = 1; reg0 = 0; reg1 = 0; reg2 = 0; reg3 = 0; reg4 = 0; reg5 = 0; reg6 = 0; reg7 = 0; reg8 = 0; reg9 = 0; reg9[0] = 1; next(pipeline=ingress, table=0); };)

EOT