diff --git a/modules/configuration-ovnk-network-plugin-json-object.adoc b/modules/configuration-ovnk-network-plugin-json-object.adoc
index f3aad8b42a12..0b7753cb4bc9 100644
--- a/modules/configuration-ovnk-network-plugin-json-object.adoc
+++ b/modules/configuration-ovnk-network-plugin-json-object.adoc
@@ -66,4 +66,9 @@ A comma-separated list of CIDRs and IP addresses. IP addresses are removed from
 |
 If topology is set to `localnet`, the specified VLAN tag is assigned to traffic from this additional network. The default is to not assign a VLAN tag.
 
+|`physicalNetworkName`
+|`string`
+|
+If topology is set to `localnet`, you can reuse the same physical network mapping with multiple network overlays. Specifies the name of the physical network to which the OVN overlay connects. When omitted, the default value is the `name` of the `localnet` network. To isolate the different networks, ensure that a different VLAN tag is used when sharing the same physical network between overlays.
+
 |====