NetGen/interface_check.patch at main · surajnsharma/NetGen · GitHub

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--- a/run_tgen_server.py
+++ b/run_tgen_server.py
@@ -3419,6 +3419,30 @@ def get_device_arp_status(device_id):
             }), 200

+        # Check if the network interface is actually up
+        server_interface = device.get('server_interface')
+        if server_interface:
+            try:
+                import subprocess
+                # Check interface status using ip link show
+                result = subprocess.run(["ip", "link", "show", server_interface],
+                                      capture_output=True, text=True, timeout=5)
+                if result.returncode == 0:
+                    # Check if interface is UP
+                    if "state DOWN" in result.stdout:
+                        return jsonify({
+                            "arp_resolved": False,
+                            "arp_ipv4_resolved": False,
+                            "arp_ipv6_resolved": False,
+                            "arp_gateway_resolved": False,
+                            "arp_status": "Interface down",
+                            "details": {"error": f"Interface {server_interface} is down"}
+                        }), 200
+                else:
+                    # Interface doesn't exist
+                    return jsonify({
+                        "arp_resolved": False,
+                        "arp_ipv4_resolved": False,
+                        "arp_ipv6_resolved": False,
+                        "arp_gateway_resolved": False,
+                        "arp_status": "Interface not found",
+                        "details": {"error": f"Interface {server_interface} not found"}
+                    }), 200
+            except Exception as e:
+                logging.warning(f"[ARP STATUS] Failed to check interface status for {server_interface}: {e}")
+                # Continue with ARP checks even if interface check fails
+
         # Get device IP addresses
         ipv4_address = device.get('ipv4_address')
         ipv6_address = device.get('ipv6_address')
         ipv4_gateway = device.get('ipv4_gateway')
         ipv6_gateway = device.get('ipv6_gateway')
-        server_interface = device.get('server_interface')

         if not server_interface:
             return jsonify({