It does not exist Port_Binding in ovn-sbctl show, what problem for this?

[cb403]

[root@ovstest ~]# ovs-vsctl show
3f9cb733-83a0-4c59-8160-2bbba9bd51f9
Bridge br-int
fail_mode: secure
datapath_type: system
Port br-int
Interface br-int
type: internal
Port vm2
Interface vm2
type: internal
ovs_version: "2.17.90"

[root@ovstest ~]# ovn-nbctl show
switch 61ecfd55-9bca-425f-8fa3-2707611dcbe2 (logicswitch_01)
port ls1-vm2

[root@ovstest ~]# ovn-sbctl show
Chassis lierda
hostname: ovstest
Encap geneve
ip: "192.168.100.188"
options: {csum="true"}

when runing on etcd by using run_ovsdb_etcd.sh、run_ovsdb_etcd_nb.sh and run_ovsdb_etcd_sb.sh, it does not exist Port_Binding in ovn-sbctl show. then can not produce the related ovs flow . why is this, any problem?