diff --git a/cmd/main.go b/cmd/main.go
index 09ba1b5..37531e4 100644
--- a/cmd/main.go
+++ b/cmd/main.go
@@ -265,6 +265,13 @@ func (app *App) handleGetDevices(w http.ResponseWriter, r *http.Request) {
 			log.Printf("Error: failed to get devices from database: %v", err)
 			// 降级到 builder获取
 			devices = app.builder.GetDevices()
+		} else {
+			// 重新构建设备到builder中，确保拓扑正确
+			app.builder = topology.NewBuilder()
+			for _, dev := range devices {
+				app.builder.AddDevice(dev)
+			}
+			log.Printf("Rebuilt topology with %d devices from database", len(devices))
 		}
 		log.Printf("Returning %d devices from storage", len(devices))
 	} else {
diff --git a/internal/topology/builder.go b/internal/topology/builder.go
index 7b0114b..8cff1da 100644
--- a/internal/topology/builder.go
+++ b/internal/topology/builder.go
@@ -50,6 +50,15 @@ func (b *Builder) Build() models.TopologyGraph {
 		}
 		nodeMap[device.IP] = node
 		graph.Nodes = append(graph.Nodes, node)
+		
+		// 调试信息
+		fmt.Printf("Node added: %s (%s) with %d neighbors\n", 
+			device.IP, device.Type, len(device.Neighbors))
+		for i, neighbor := range device.Neighbors {
+			fmt.Printf("  Neighbor %d: RemoteIP=%s, RemoteDevice=%s, LocalIf=%s, RemoteIf=%s\n",
+				i+1, neighbor.RemoteIP, neighbor.RemoteDevice, 
+				neighbor.LocalInterface, neighbor.RemoteInterface)
+		}
 	}
 
 	// 构建边(基于邻居信息)