diff --git a/net.go b/net.go
index 768d4b2..da601f7 100644
--- a/net.go
+++ b/net.go
@@ -192,6 +192,16 @@ type Net interface {
 	// Interfaces returns a list of the system's network interfaces.
 	Interfaces() ([]*Interface, error)
 
+	// InterfaceByIndex returns the interface specified by index.
+	//
+	// On Solaris, it returns one of the logical network interfaces
+	// sharing the logical data link; for more precision use
+	// InterfaceByName.
+	InterfaceByIndex(index int) (*Interface, error)
+
+	// InterfaceByName returns the interface specified by name.
+	InterfaceByName(name string) (*Interface, error)
+
 	// The following functions are extensions to Go's standard net package
 
 	CreateDialer(dialer *net.Dialer) Dialer
diff --git a/stdnet/net.go b/stdnet/net.go
index d30830a..d755bed 100644
--- a/stdnet/net.go
+++ b/stdnet/net.go
@@ -66,6 +66,21 @@ func (n *Net) Interfaces() ([]*transport.Interface, error) {
 	return n.interfaces, nil
 }
 
+// InterfaceByIndex returns the interface specified by index.
+//
+// On Solaris, it returns one of the logical network interfaces
+// sharing the logical data link; for more precision use
+// InterfaceByName.
+func (n *Net) InterfaceByIndex(index int) (*transport.Interface, error) {
+	for _, ifc := range n.interfaces {
+		if ifc.Index == index {
+			return ifc, nil
+		}
+	}
+
+	return nil, fmt.Errorf("%w: index=%d", transport.ErrInterfaceNotFound, index)
+}
+
 // InterfaceByName returns the interface specified by name.
 func (n *Net) InterfaceByName(name string) (*transport.Interface, error) {
 	for _, ifc := range n.interfaces {
diff --git a/vnet/net.go b/vnet/net.go
index e3ae0f4..99e303a 100644
--- a/vnet/net.go
+++ b/vnet/net.go
@@ -91,6 +91,21 @@ func (v *Net) getInterface(ifName string) (*transport.Interface, error) {
 	return v._getInterface(ifName)
 }
 
+// InterfaceByIndex returns the interface specified by index.
+//
+// On Solaris, it returns one of the logical network interfaces
+// sharing the logical data link; for more precision use
+// InterfaceByName.
+func (v *Net) InterfaceByIndex(index int) (*transport.Interface, error) {
+	for _, ifc := range v.interfaces {
+		if ifc.Index == index {
+			return ifc, nil
+		}
+	}
+
+	return nil, fmt.Errorf("%w: index=%d", transport.ErrInterfaceNotFound, index)
+}
+
 // InterfaceByName returns the interface specified by name.
 func (v *Net) InterfaceByName(ifName string) (*transport.Interface, error) {
 	return v.getInterface(ifName)