diff --git a/plugins/sentinel/dashboard.html b/plugins/sentinel/dashboard.html
index 9020053..b86cbc6 100644
--- a/plugins/sentinel/dashboard.html
+++ b/plugins/sentinel/dashboard.html
@@ -258,11 +258,7 @@
               if (charts.cpu) charts.cpu.update(cpuVal);
               if (charts.mem) charts.mem.update(memVal);
               if (charts.net) {
-                var rx = net.rx_bytes_sec||0, tx = net.tx_bytes_sec||0;
-                charts.net.update(rx, tx);
-                // 惰性量程: 仅当数据超过当前上限才扩大
-                var curMax = Math.max(rx, tx, 100);
-                if (curMax > charts.net.maxVal) charts.net.maxVal = curMax;
+                charts.net.update(net.rx_bytes_sec||0, net.tx_bytes_sec||0);
               }
             } catch(e) {}
           }