diff --git a/src/components/topology/node-detail-sheet.tsx b/src/components/topology/node-detail-sheet.tsx
index c48953e..99cba9c 100644
--- a/src/components/topology/node-detail-sheet.tsx
+++ b/src/components/topology/node-detail-sheet.tsx
@@ -6,6 +6,7 @@ import {
   Network,
   Clock3,
   FileText,
+  Route,
 } from 'lucide-react'
 import { Badge } from '@/components/ui/badge'
 import { Button } from '@/components/ui/button'
@@ -18,6 +19,7 @@ import {
   SheetHeader,
   SheetTitle,
 } from '@/components/ui/sheet'
+import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs'
 import { formatNanoDelay } from '@/lib/format'
 
 export interface SheetNodeInfo {
@@ -45,6 +47,7 @@ interface NodeDetailSheetProps {
   /** 设备描述（来自 /api/node-info 查询） */
   description?: string | null
   descriptionLoading?: boolean
+  extraRoutes?: string[]
 }
 
 export function NodeDetailSheet({
@@ -56,6 +59,7 @@ export function NodeDetailSheet({
   onCopy,
   description,
   descriptionLoading,
+  extraRoutes = [],
 }: NodeDetailSheetProps) {
   if (!node) return null
 
@@ -91,7 +95,13 @@ export function NodeDetailSheet({
           </div>
         </SheetHeader>
 
-        <div className="flex flex-1 flex-col gap-4 overflow-y-auto p-4">
+        <div className="flex flex-1 flex-col overflow-y-auto p-4">
+          <Tabs defaultValue="overview" className="min-h-0">
+            <TabsList className="w-full">
+              <TabsTrigger value="overview">概要</TabsTrigger>
+              <TabsTrigger value="routes"><Route className="size-3.5" />额外路由</TabsTrigger>
+            </TabsList>
+            <TabsContent value="overview" className="flex flex-col gap-4 pt-4">
           {/* Device Description */}
           <div className="flex flex-col gap-1.5 rounded-lg border bg-muted/30 p-3">
             <span className="flex items-center gap-1.5 text-xs font-medium text-muted-foreground">
@@ -197,6 +207,26 @@ export function NodeDetailSheet({
             <Gauge data-icon="inline-start" />
             发起 Kperf 测速（即将支持）
           </Button>
+            </TabsContent>
+            <TabsContent value="routes" className="pt-4">
+              {descriptionLoading ? (
+                <div className="flex flex-col gap-1.5 py-8" aria-live="polite">
+                  <Skeleton className="h-3.5 w-full" />
+                  <Skeleton className="h-3.5 w-2/3" />
+                </div>
+              ) : extraRoutes.length === 0 ? (
+                <p className="py-8 text-center text-xs text-muted-foreground">暂无额外路由</p>
+              ) : (
+                <ul className="flex flex-col gap-1.5" aria-label="额外路由列表">
+                  {extraRoutes.map((route, index) => (
+                    <li key={`${route}-${index}`}>
+                      <code className="block select-text break-all rounded-md border bg-muted/30 px-2.5 py-2 font-mono text-xs text-foreground">{route}</code>
+                    </li>
+                  ))}
+                </ul>
+              )}
+            </TabsContent>
+          </Tabs>
         </div>
       </SheetContent>
     </Sheet>
diff --git a/src/hooks/use-topology.ts b/src/hooks/use-topology.ts
index 411b600..6e8b8fb 100644
--- a/src/hooks/use-topology.ts
+++ b/src/hooks/use-topology.ts
@@ -14,6 +14,8 @@ export interface LayoutNode extends SimulationNodeDatum {
   compressedAddress?: string
   isSelf: boolean
   deviceName?: string
+  nodeInfoFullRevision?: number
+  nodeInfoFullRevisionEpoch?: string
   x: number
   y: number
 }
@@ -117,7 +119,11 @@ export function useTopology(): UseTopologyResult {
       const topoNodes: TopologyNode[] = Array.isArray(payload.nodes)
         ? payload.nodes.filter(
             (n) => n && typeof n.id === 'string' && n.id !== ''
-          )
+          ).map((n) => ({
+            ...n,
+            nodeInfoFullRevision: n.nodeInfoFullRevision ?? 0,
+            nodeInfoFullRevisionEpoch: n.nodeInfoFullRevisionEpoch ?? '',
+          }))
         : []
       const topoEdgesRaw: TopologyEdge[] = Array.isArray(payload.edges)
         ? payload.edges
@@ -170,7 +176,14 @@ export function useTopology(): UseTopologyResult {
           prev.length === topoNodes.length
             ? prev.map((n) => {
                 const fresh = topoNodes.find((t) => t.id === n.id)
-                return fresh ? { ...n, deviceName: fresh.deviceName } : n
+                return fresh
+                  ? {
+                      ...n,
+                      deviceName: fresh.deviceName,
+                      nodeInfoFullRevision: fresh.nodeInfoFullRevision,
+                      nodeInfoFullRevisionEpoch: fresh.nodeInfoFullRevisionEpoch,
+                    }
+                  : n
               })
             : prev
         )
diff --git a/src/pages/topology.tsx b/src/pages/topology.tsx
index eaa795c..28c0918 100644
--- a/src/pages/topology.tsx
+++ b/src/pages/topology.tsx
@@ -1,4 +1,4 @@
-import { useState, useMemo, useCallback, useRef } from 'react'
+import { useState, useMemo, useCallback, useRef, useEffect } from 'react'
 import { ReactFlowProvider } from '@xyflow/react'
 import {
   Share2,
@@ -17,6 +17,22 @@ import { TopologyCanvas } from '@/components/topology/topology-canvas'
 import { NodeDetailSheet } from '@/components/topology/node-detail-sheet'
 import type { NodeInfoDetail } from '@/types/api'
 
+type NodeInfoFreshnessKey = readonly [epoch: string, revision: number]
+
+function getNodeInfoFreshnessKey(node: {
+  nodeInfoFullRevision?: number
+  nodeInfoFullRevisionEpoch?: string
+}): NodeInfoFreshnessKey {
+  return [node.nodeInfoFullRevisionEpoch ?? '', node.nodeInfoFullRevision ?? 0]
+}
+
+function freshnessKeysEqual(
+  left: NodeInfoFreshnessKey | null,
+  right: NodeInfoFreshnessKey
+): boolean {
+  return left?.[0] === right[0] && left?.[1] === right[1]
+}
+
 export function TopologyPage() {
   const { nodes, edges, isLoading, error, relayout } = useTopology()
   const [searchQuery, setSearchQuery] = useState('')
@@ -28,6 +44,23 @@ export function TopologyPage() {
   const [nodeInfo, setNodeInfo] = useState<NodeInfoDetail | null>(null)
   const [nodeInfoLoading, setNodeInfoLoading] = useState(false)
   const nodeInfoSeqRef = useRef(0)
+  const nodeInfoFreshnessRef = useRef<NodeInfoFreshnessKey | null>(null)
+  const nodeInfoRevisionInitializedRef = useRef(false)
+
+  const fetchNodeInfo = useCallback((nodeId: string) => {
+    setNodeInfo(null)
+    setNodeInfoLoading(true)
+    const seq = ++nodeInfoSeqRef.current
+    fetch(`/api/node-info?address=${encodeURIComponent(nodeId)}`)
+      .then((res) => (res.ok ? res.json() : null))
+      .then((data: NodeInfoDetail | null) => {
+        if (seq === nodeInfoSeqRef.current && data) setNodeInfo(data)
+      })
+      .catch(() => {})
+      .finally(() => {
+        if (seq === nodeInfoSeqRef.current) setNodeInfoLoading(false)
+      })
+  }, [])
 
   const handleCopy = useCallback((text: string) => {
     navigator.clipboard.writeText(text)
@@ -39,30 +72,18 @@ export function TopologyPage() {
     setSelectedNodeId(nodeId)
     if (nodeId) {
       setSheetOpen(true)
-      setNodeInfo(null)
-      setNodeInfoLoading(true)
-      const seq = ++nodeInfoSeqRef.current
-      fetch(`/api/node-info?address=${encodeURIComponent(nodeId)}`)
-        .then((res) => (res.ok ? res.json() : null))
-        .then((data: NodeInfoDetail | null) => {
-          // 防止乱序：仅当仍是当前选中节点时才应用结果
-          if (seq === nodeInfoSeqRef.current && data) {
-            setNodeInfo(data)
-          }
-        })
-        .catch(() => {})
-        .finally(() => {
-          if (seq === nodeInfoSeqRef.current) {
-            setNodeInfoLoading(false)
-          }
-        })
+      const selected = nodes.find((node) => node.id === nodeId)
+      nodeInfoFreshnessRef.current = getNodeInfoFreshnessKey(selected ?? {})
+      nodeInfoRevisionInitializedRef.current = true
+      fetchNodeInfo(nodeId)
     } else {
       setSheetOpen(false)
       setNodeInfo(null)
       setNodeInfoLoading(false)
       nodeInfoSeqRef.current++
+      nodeInfoRevisionInitializedRef.current = false
     }
-  }, [])
+  }, [fetchNodeInfo, nodes])
 
   const handleNodeDragEnd = useCallback(
     (_id: string, _x: number, _y: number) => {
@@ -78,6 +99,16 @@ export function TopologyPage() {
     [nodes, selectedNodeId]
   )
 
+  useEffect(() => {
+    if (!selectedNode) return
+    const freshnessKey = getNodeInfoFreshnessKey(selectedNode)
+    if (!nodeInfoRevisionInitializedRef.current) return
+    if (!freshnessKeysEqual(nodeInfoFreshnessRef.current, freshnessKey)) {
+      nodeInfoFreshnessRef.current = freshnessKey
+      fetchNodeInfo(selectedNode.id)
+    }
+  }, [selectedNode, fetchNodeInfo])
+
   // 邻居信息（基于边集合推导）
   const neighbors = useMemo(() => {
     if (!selectedNode) return []
@@ -203,6 +234,7 @@ export function TopologyPage() {
         onCopy={handleCopy}
         description={nodeInfo?.deviceDescription ?? null}
         descriptionLoading={nodeInfoLoading}
+        extraRoutes={nodeInfo?.extraRoutes}
       />
     </div>
   )
diff --git a/src/types/api.ts b/src/types/api.ts
index 3b54c6e..9a87d83 100644
--- a/src/types/api.ts
+++ b/src/types/api.ts
@@ -80,6 +80,8 @@ export interface TopologyNode {
   compressedAddress?: string
   isSelf: boolean
   deviceName?: string
+  nodeInfoFullRevision?: number
+  nodeInfoFullRevisionEpoch?: string
 }
 
 export interface TopologyEdge {
@@ -101,6 +103,7 @@ export interface NodeInfoDetail {
   deviceDescription: string
   reachable?: boolean
   openLines?: string[]
+  extraRoutes?: string[]
 }
 
 export interface KLALBControllerConfig {