"d,a,t,a,c,e,n,t,r,e,:,b,r,-,e,x"
 

[root@overcloud-novacompute-0 tripleo-admin]# podman exec -it ovn_controller bash
[root@overcloud-novacompute-0 /]# ovs-vsctl get open . external_ids
{hostname=overcloud-novacompute-0.localdomain, ovn-bridge=br-int, ovn-bridge-mappings="d,a,t,a,c,e,n,t,r,e,:,b,r,-,e,x", ovn-chassis-mac-mappings="d:0e:a2:32:8a:86:3f,a:1e:de:32:8a:86:3f,t:1e:6d:32:8a:86:3f,c:0e:b8:32:8a:86:3f,e:0e:61:32:8a:86:3f,n:3e:13:32:8a:86:3f,r:0e:12:32:8a:86:3f,:1e:be:32:8a:86:3f,b:2e:5e:32:8a:86:3f,-:3e:9a:32:8a:86:3f,x:3e:b9:32:8a:86:3f", ovn-encap-ip="172.16.0.101", ovn-encap-tos="0", ovn-encap-type=geneve, ovn-match-northd-version=False, ovn-monitor-all=True, ovn-ofctrl-wait-before-clear="8000", ovn-openflow-probe-interval="60", ovn-remote="tcp:ovsdbserver-sb.openstack.svc:6642", ovn-remote-probe-interval="60000", rundir="/var/run/openvswitch", system-id="4c952b83-b78d-405c-ad44-11e5b5be1bd5"}
[root@overcloud-novacompute-0 /]# ovs-vsctl set Open_vSwitch . external_ids:ovn-bridge-mappings="datacentre:br-ex"
[root@overcloud-novacompute-0 /]# ovs-vsctl get open . external_ids
{hostname=overcloud-novacompute-0.localdomain, ovn-bridge=br-int, ovn-bridge-mappings="datacentre:br-ex", ovn-chassis-mac-mappings="d:0e:a2:32:8a:86:3f,a:1e:de:32:8a:86:3f,t:1e:6d:32:8a:86:3f,c:0e:b8:32:8a:86:3f,e:0e:61:32:8a:86:3f,n:3e:13:32:8a:86:3f,r:0e:12:32:8a:86:3f,:1e:be:32:8a:86:3f,b:2e:5e:32:8a:86:3f,-:3e:9a:32:8a:86:3f,x:3e:b9:32:8a:86:3f", ovn-encap-ip="172.16.0.101", ovn-encap-tos="0", ovn-encap-type=geneve, ovn-match-northd-version=False, ovn-monitor-all=True, ovn-ofctrl-wait-before-clear="8000", ovn-openflow-probe-interval="60", ovn-remote="tcp:ovsdbserver-sb.openstack.svc:6642", ovn-remote-probe-interval="60000", rundir="/var/run/openvswitch", system-id="4c952b83-b78d-405c-ad44-11e5b5be1bd5"}