Issue

DPDK vhost-user port does not send or receive any traffic and is listed as LINK_DOWN in ovs-ofctl show br-int in Red Hat OpenStack Platform 10

The port state equals LINK_DOWN, even though the instance is running:

[root@overcloud-compute-0 ~]# ovs-ofctl show br-int
OFPT_FEATURES_REPLY (xid=0x2): dpid:0000a2752c2bf94a
n_tables:254, n_buffers:256
capabilities: FLOW_STATS TABLE_STATS PORT_STATS QUEUE_STATS ARP_MATCH_IP
actions: output enqueue set_vlan_vid set_vlan_pcp strip_vlan mod_dl_src mod_dl_dst mod_nw_src mod_nw_dst mod_nw_tos mod_tp_src mod_tp_dst
 1(int-br-link): addr:c6:87:d2:a8:f1:01
     config:     0
     state:      0
     speed: 0 Mbps now, 0 Mbps max
 3(vhub3fc898c-9c): addr:00:00:00:00:00:00
     config:     0
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
 4(vhost-user2): addr:00:00:00:00:00:00
     config:     0
     state:      LINK_DOWN
     speed: 0 Mbps now, 0 Mbps max
 LOCAL(br-int): addr:a2:75:2c:2b:f9:4a
[root@overcloud-compute-0 ~]#