diff --git a/neutron_lib/api/definitions/portbindings.py b/neutron_lib/api/definitions/portbindings.py
index 5a2d21b53..7394ef7d4 100644
--- a/neutron_lib/api/definitions/portbindings.py
+++ b/neutron_lib/api/definitions/portbindings.py
@@ -51,6 +51,8 @@ VIF_DETAILS_MACVTAP_SOURCE = 'macvtap_source'
 VIF_DETAILS_MACVTAP_MODE = 'macvtap_mode'
 VIF_DETAILS_PHYSICAL_INTERFACE = 'physical_interface'
 VIF_DETAILS_BRIDGE_NAME = 'bridge_name'
+VIF_DETAILS_CONNECTIVITY = 'connectivity'
+VIF_DETAILS_BOUND_DRIVERS = 'bound_drivers'
 
 # OVS bridge datapath type: String value used to define if the bridge uses
 # kernel or userspace datapath.
@@ -117,6 +119,11 @@ VNIC_SMARTNIC = 'smart-nic'
 VNIC_TYPES = [VNIC_NORMAL, VNIC_DIRECT, VNIC_MACVTAP, VNIC_BAREMETAL,
               VNIC_DIRECT_PHYSICAL, VNIC_VIRTIO_FORWARDER, VNIC_SMARTNIC]
 
+# VIF_DETAILS_CONNECTIVITY: Indicates what kind of connectivity the network
+#                           back-end provides: L2, L3 or not specified.
+CONNECTIVITY_L2 = 'l2'
+CONNECTIVITY_L3 = 'l3'
+CONNECTIVITY_LEGACY = 'legacy'
 
 # The alias of the extension.
 ALIAS = 'binding'
diff --git a/releasenotes/notes/new-vif-details-parameters-71e70ab5e7c26c45.yaml b/releasenotes/notes/new-vif-details-parameters-71e70ab5e7c26c45.yaml
new file mode 100644
index 000000000..0764399da
--- /dev/null
+++ b/releasenotes/notes/new-vif-details-parameters-71e70ab5e7c26c45.yaml
@@ -0,0 +1,9 @@
+---
+features:
+  - |
+    Added two new parameters in ``portbindings.port.vif_details``:
+
+    * ``connectivity``: a string informing about the back-end connectivity
+      level (l2, l3 or not specified).
+    * ``bound_drivers``: a dictionary mapping the binding level to the driver
+      name.