diff --git a/README.md b/README.md
index 52f2287..ad36939 100644
--- a/README.md
+++ b/README.md
@@ -137,5 +137,6 @@ and then bridges Ethernet frames between the relay and the first TAP-Windows6
 adapter until shutdown.
 `--virtual-mac` can still override the stored identity for manual testing. On
 Windows it marks the TAP media connected and reports the driver MAC/MTU before
-forwarding frames. Default-route takeover neutralization and automatic TAP
-MAC/MTU configuration are not wired yet.
+forwarding frames, along with the TAP interface index/LUID. Default-route
+takeover neutralization and automatic TAP MAC/MTU configuration are not wired
+yet.
diff --git a/crates/lanparty-client-win/src/main.rs b/crates/lanparty-client-win/src/main.rs
index 012d20d..baca39d 100644
--- a/crates/lanparty-client-win/src/main.rs
+++ b/crates/lanparty-client-win/src/main.rs
@@ -185,6 +185,9 @@ fn print_pinned_relay_route(route: &PinnedRelayRoute) {
 fn open_tap_adapter(session: &ClientSession) -> Result<lanparty_client_tap::TapAdapter> {
     let tap = lanparty_client_tap::open_first_adapter()?;
     tap.set_media_connected(true)?;
+    let tap_interface =
+        lanparty_client_route::interface_identity_from_guid(tap.info().instance_id())
+            .context("failed to resolve TAP interface identity")?;
     let driver_mac = tap.driver_mac()?;
     let driver_mtu = tap.driver_mtu()?;
 
@@ -198,6 +201,11 @@ fn open_tap_adapter(session: &ClientSession) -> Result<lanparty_client_tap::TapA
         driver_mtu,
         session.welcome().effective_tap_mtu()
     );
+    println!(
+        "TAP interface index {} LUID {}",
+        tap_interface.index(),
+        tap_interface.luid()
+    );
     if driver_mac != session.config().virtual_mac() {
         eprintln!(
             "TAP driver MAC {} does not match tunnel identity {}; MAC configuration is not wired yet",