{"id":478,"date":"2013-08-15T11:45:49","date_gmt":"2013-08-15T03:45:49","guid":{"rendered":"http:\/\/blog.marvelplanet.tk\/?p=478"},"modified":"2013-08-15T11:59:19","modified_gmt":"2013-08-15T03:59:19","slug":"floodlight%e8%b7%af%e7%94%b1%e6%9c%ba%e5%88%b6%e8%a7%a3%e6%9e%90","status":"publish","type":"post","link":"https:\/\/marvelliu.space\/?p=478","title":{"rendered":"Floodlight\u8def\u7531\u673a\u5236\u89e3\u6790"},"content":{"rendered":"<p>\u8def\u7531\u90e8\u5206\u662ffloodlight\u6700\u6838\u5fc3\u7684\u673a\u5236\uff0c\u8fd9\u4e24\u5929\u4ed4\u7ec6\u8bfb\u4e86\u4e00\u4e0bfloodlight\u8fd9\u90e8\u5206\u7684\u4ee3\u7801\uff0c\u603b\u7b97\u6709\u4e86\u5927\u4f53\u4e0a\u7684\u4e86\u89e3\uff0c\u4e0e\u5404\u4f4d\u5206\u4eab\u3002<\/p>\n<p>\u672c\u6587\u4e2d\u7684floodlight\uff08FL\uff09\u4e0e\u63a7\u5236\u5668\/\u7f51\u7edc\u63a7\u5236\u5668\uff08NC, nework controller \uff09 \u7b49\u672f\u8bed\u7b49\u540c\uff0c\u4ea4\u6362\u673a\uff08SW\uff09\u9ed8\u8ba4\u4e3aopenflow-enabled switch\uff0c\u4e0d\u518d\u8d58\u8ff0\u3002<\/p>\n<p>\u9996\u5148\u8c08\u4e00\u4e0bSDN\u63a7\u5236\u5668\u7684\u8def\u7531\u539f\u7406\uff1a\u5f53\u4ea4\u6362\u673a\u6536\u5230\u4e00\u4e2a\u4e0d\u80fd\u88ab\u5f53\u524d\u6d41\u8868\u5404\u6761\u6d41\u5339\u914d\u7684\u6570\u636e\u5305\u65f6\uff0c\u4f1a\u628a\u8fd9\u4e2a\u6570\u636e\u5305\u4ee5openflow\u7684\u683c\u5f0f\uff08PACKET_IN\uff09\u53d1\u9001\u7ed9\u63a7\u5236\u5668\u3002\u63a7\u5236\u5668\u7ecf\u8fc7\u8def\u7531\u51b3\u7b56\u540e\uff0c\u540c\u6837\u4ee5openflow\u7684\u683c\u5f0f\uff08PACKET_OUT\uff09\u7684\u65b9\u5f0f\u5c06\u8be5\u6570\u636e\u5305\u7684\u4e0b\u4e00\u8df3\u4fe1\u606f\u56de\u7ed9\u8be5\u4ea4\u6362\u673a\u3002<\/p>\n<p>\u5982\u679c\u5b66\u8fc7\u6700\u77ed\u8def\u5f84\u8ba1\u7b97\u7684\u540c\u5b66\u4e00\u5b9a\u77e5\u9053\uff0c\u4e24\u70b9\u4e4b\u95f4\u7684\u6700\u77ed\u8def\u5f84\u8ba1\u7b97\u9996\u5148\u8981\u77e5\u9053\u4efb\u610f\u4e24\u70b9\u4e4b\u95f4\u662f\u5426\u76f8\u8fde\uff0c\u5982\u679c\u4e24\u8005\u95f4\u6709link\u76f8\u8fde\u8fd8\u9700\u77e5\u9053\u5176\u957f\u5ea6\u3002\u6240\u4ee5\u603b\u4f53\u800c\u8a00\uff0cFL\u8def\u7531\u5305\u62ec\u4e24\u90e8\u5206\uff1a\u62d3\u6251\u66f4\u65b0\u548c\u8def\u7531\u8ba1\u7b97\uff0c\u524d\u8005\u662f\u5b9a\u65f6\u4e8b\u5148\u5b8c\u6210\u7684\uff0c\u5f62\u6210\u4e00\u4e2a\u5168\u5c40\u7684\u62d3\u6251\u7ed3\u6784\uff0c\u540e\u8005\u662f\u6536\u5230\u6570\u636e\u5305\u540e\u8fd0\u884c\u65f6\u5b8c\u6210\u7684\uff0c\u6839\u636e\u62d3\u6251\u751f\u6210\u8def\u7531\u7b56\u7565\u3002<\/p>\n<p>\u9996\u5148\u770b\u62d3\u6251\u66f4\u65b0\u3002SDN\u73af\u5883\u4e2d\u62d3\u6251\u662f\u96c6\u4e2d\u63a7\u5236\u7684\uff0c\u6545FL\u9700\u8981\u4e86\u89e3\u5168\u5c40\u7684\u62d3\u6251\u73af\u5883\uff0c\u6240\u4ee5FL\u5728\u94fe\u8def\u66f4\u65b0\u65f6\u81ea\u52a8\u66f4\u65b0\u62d3\u6251\u3002<\/p>\n<ul><strong>1 \u94fe\u8def\u66f4\u65b0<\/strong><\/ul>\n<p> \u5f53\u4ea4\u6362\u673a\u52a0\u5165SDN\u73af\u5883\u540e\uff0c\u63a7\u5236\u5668\u901a\u8fc7LLDP\u534f\u8bae\u5b9a\u65f6\u5730\u83b7\u5f97\u8be5\u4ea4\u6362\u673a\u4e0e\u5176\u4ed6\u8bbe\u5907\u8fde\u63a5\u7684link\u4fe1\u606f\uff0c\u7136\u540e\u6dfb\u52a0\u6216\u66f4\u65b0\u8fd9\u4e9blink(LinkDiscoveryManager.addOrUpdateLink())\uff0c\u6700\u540e\u5c06\u8fd9\u4e9blink\u66f4\u65b0\u7684\u4e8b\u4ef6\u6dfb\u52a0\u5230updates\u961f\u5217\u4e2d(LinkDiscoveryManager.handleLldp())\u3002<\/p>\n<ul><strong>2 \u62d3\u6251\u66f4\u65b0<\/strong><\/ul>\n<p> \u8ba1\u7b97\u8def\u7531\u7684\u5173\u952e\u5728\u4e8e\u8def\u5f84\u66f4\u65b0\u548c\u8def\u7531\u8ba1\u7b97\uff0c\u8be5\u8fc7\u7a0b\u4e3a\uff1a<br \/>\n  <strong>2.1 \u542f\u52a8<\/strong> \u9996\u5148\u62d3\u6251\u7ba1\u7406\u542f\u52a8\uff08TopologyManager.startUp()\uff09\u65f6\u65b0\u8d77\u4e00\u4e2a\u7ebf\u7a0bUpdateTopologyWorker\uff0c\u95f4\u9694500ms\u91cd\u590d\u8fd0\u884c \u3002<br \/>\n  <strong>2.2 \u66f4\u65b0\u62d3\u6251<\/strong> \u5982\u679c\u4e4b\u524d\u5728\u7b2c\u4e00\u6b65\u4e2d\u6709\u4e00\u4e9b\u94fe\u8def\u3001\u4ea4\u6362\u673a\u7b49\u66f4\u65b0\uff0c\u90a3\u4e48LDUpdates\u961f\u5217\u4e2d\u4f1a\u6709\u5143\u7d20\uff0c\u90a3\u4e48\u4f9d\u6b21\u53d6\u51fa\u8fd9\u4e9b\u94fe\u8def\u66f4\u65b0\u7684\u5143\u7d20\uff08TopologyManager.updateTopology()\/TopologyManager.applyUpdates()\uff09\uff0c\u5224\u65ad\u5176\u7c7b\u578b\uff08\u5982\u94fe\u8def\u66f4\u65b0\/\u5220\u9664\u3001\u7aef\u53e3\u589e\u52a0\/\u5220\u9664\uff09\uff0c\u8fdb\u884c\u54cd\u5e94\u5904\u7406\u3002<br \/>\n         \u4ee5\u94fe\u8def\u66f4\u65b0\u4e3a\u4f8b\uff0c\u8c03\u7528TopologyManager.addOrUpdateLink()\u65b9\u6cd5\uff0c\u5224\u65ad\u94fe\u8def\u7c7b\u578b\uff08\u591a\u8df3\u3001\u5355\u8df3\u6216\u96a7\u9053\uff09\uff0c\u518d\u628alink\u6dfb\u52a0\u5230\u76f8\u5e94\u4ea4\u6362\u673a\u7684\u7aef\u53e3\u4e2d\uff0c\u5982\u679c\u662f\u591a\u8df3\u7684\u5219\u518d\u5220\u9664\u53ef\u80fd\u7684\u5355\u8df3link<br \/>\n  <strong>2.3 \u8ba1\u7b97\u62d3\u6251\u8def\u5f84<\/strong> \u6bcf\u6b21\u65b0\u5efa\u4e00\u4e2a\u5b9e\u4f8b\uff08TopologyManager.createNewInstance()\uff09\uff0c\u521d\u59cb\u5316\u8fc7\u7a0b\u4e2d\u8ba1\u7b97\u62d3\u6251\u8def\u5f84\uff08TopologyInstance.compute()\uff09\uff0c\u5177\u4f53\u5730\uff1a<br \/>\n    <strong>2.3.1 \u5f52\u7c7b<\/strong> \u5c06\u73b0\u6709\u6240\u6709\u76f8\u8fde\u7684link\u7f6e\u4e8e\u540c\u4e00\u4e2a\u7c07\u4e2d\uff0c\u4ece\u800c\u5f62\u6210\u591a\u4e2a\u7c07\u7ed3\u6784\uff08identifyOpenflowDomains()\uff09<br \/>\n    <strong>2.3.2 \u5efa\u7c07<\/strong> \u904d\u5386\u6240\u6709link\uff08addLinksToOpenflowDomains()\uff09\uff0c\u5982\u679clink\u8fde\u63a5\u7684\u662f\u540c\u4e00\u4e2a\u7c07\uff0c\u5219\u5c06\u5176\u52a0\u5165\u8be5\u7c07\uff0c\u6240\u4ee5\u8be5\u65b9\u6cd5\u7edf\u8ba1\u4e86\u6240\u6709\u7c07\u5185\u7684link\u3002FL\u8fd9\u4e48\u505a\u4e5f\u662f\u51cf\u5c11\u8def\u7531\u8ba1\u7b97\u7684\u5f00\u9500\uff0c\u4e0d\u7136\u82e5\u5e72\u4e2a\u5927\u4e8c\u5c42\u7f51\u7edc\u4e2d\u5171\u6709n\u4e2a\u8282\u70b9\uff0c\u5c31\u9700\u8981n\u5e73\u65b9\u7684\u5b58\u50a8\u5f00\u9500\uff0c\u8ba1\u7b97\u6548\u7387\u4e5f\u4f1a\u4e0b\u964d\uff0c\u5982\u679c\u5c06\u4e0d\u76f8\u8fde\u7684\u8282\u70b9\u5206\u5f00\u5c31\u51cf\u5c11\u4e86\u4e0a\u8ff0\u5f00\u9500\u3002<br \/>\n    <strong>2.3.3 \u904d\u5386\u6240\u6709\u7c07<\/strong> \u5bf9\u4e8e\u6bcf\u4e2a\u7c07\u5185sw\uff0c\u5f62\u6210\u4e00\u4e2aBroadcastTree\u7ed3\u6784\uff08\u5305\u62ec\u4e24\u4e2a\u5c5e\u6027\uff1acost\u8bb0\u5f55\u5230\u5176\u4ed6\u7c07\u5185sw\u7684\u8def\u5f84\u957f\u5ea6\uff0clinks\u8bb0\u5f55\u5176\u4ed6sw\u7684link\uff09\uff0c\u6700\u7ec8\u5c06\u4fe1\u606f\u4fdd\u5b58\u5230destinationRootedTrees\u4e2d\uff08caculateShortestPathTreeInClusters ()\u548ccalculateBroadcastNodePortsInClusters()\uff09\uff0c\u6838\u5fc3\u601d\u60f3\u5c31\u662f\u4f7f\u7528dijkstra\u8ba1\u7b97\u7c07\u5185\u4efb\u610f\u4e24\u70b9\u7684\u6700\u77ed\u8def\u5f84\uff0c\u4fdd\u5b58\u5230\u8be5\u70b9\u7684cost\u548c\u4e0b\u4e00\u8df3\u3002<br \/>\n  <strong>2.4 \u5b9a\u4e49\u8def\u5f84\u8ba1\u7b97\u6a21\u5f0f<\/strong> \u8fd9\u6837\uff0cFL\u5c31\u83b7\u5f97\u4e86\u4ece\u4e00\u4e2a\u70b9\u51fa\u53d1\u6240\u6709\u76f8\u8fde\u7684\u6240\u6709\u8def\u5f84\u548c\u70b9\u3002\u90a3\u4e48\u53ea\u8981\u7ed9\u5b9a\u4e00\u4e2a\u6e90SW\u8282\u70b9\u548c\u4e00\u4e2a\u76ee\u7684SW\u8282\u70b9\uff0c\u90a3\u5c31\u80fd\u77e5\u9053\u8fd9\u4e24\u8005\u95f4\u7684\u6700\u77ed\u8def\u5f84\u957f\u5ea6\u548c\u3002\u65e9\u57282.3\u5f00\u59cbTopologyInstance\u5728\u5b9a\u671f\u65b0\u5efa\u5b9e\u4f8b\u65f6\uff0c\u5c31\u5b9a\u4e49\u4e86\u6839\u636e\u62d3\u6251\u8ba1\u7b97\u8def\u5f84\u7684\u65b9\u6cd5\uff1a<\/p>\n<pre class=\"java\" name=\"code\"> \r\npathcache = CacheBuilder.newBuilder().concurrencyLevel(4)\r\n                    .maximumSize(1000L)\r\n                    .build(\r\n                            new CacheLoader<RouteId, Route>() {\r\n                                public Route load(RouteId rid) {\r\n                                    return pathCacheLoader.load(rid);\r\n                                }\r\n                            });<\/pre>\n<p>\u8fd9\u91cc\u7684pathcache\u662f\u4e00\u4e2a\u7c7b\u4f3chash\u8868\u7684\u7ed3\u6784\uff0c\u6bcf\u5f53\u88ab\u8c03\u7528get\u65f6\u6267\u884cpathCacheLoader.load(rid)\uff0c\u6240\u4ee5\u8fd9\u91cc\u6ca1\u6709\u771f\u6b63\u8ba1\u7b97\u8def\u7531\u8def\u5f84\uff0c\u53ea\u662f\u4e00\u4e2a\u6ce8\u518c\u56de\u8c03\u3002\u5177\u4f53\u8fd0\u884c\u65f6\u5728\u540e\u97623.6\u4e2d\u7684getRoute\u65b9\u6cd5\u4e2d\u88ab\u8c03\u7528\uff1a<\/p>\n<pre class=\"java\" name=\"code\"> \r\n            result = pathcache.get(id);\r\n<\/pre>\n<p>\u5728TopologyInstance.buildRoute\u65b9\u6cd5\u5b9e\u73b0\u8be5\u8def\u7531rid\u7684\u8ba1\u7b97\uff1a\u5148\u786e\u5b9a\u76ee\u7684sw\uff0c\u56e0\u4e3a2.3.2\u4e2d\u4ee5\u83b7\u5f97\u6e90\u76ee\u7684sw\u7684\u6700\u77ed\u8def\u5f84\uff0c\u7136\u540e\u6839\u636enexthoplinks\u8fed\u4ee3\u67e5\u627e\u8be5\u8def\u5f84\u4e0a\u7684\u6240\u6709sw\uff0c\u6700\u7ec8\u5f62\u6210\u4e00\u4e2apath\u3002<br \/>\n\u867d\u71362.4\u4e2d\u6ca1\u6709\u6700\u7ec8\u8ba1\u7b97\u8282\u70b9\u95f4\u7684\u8def\u5f84\uff0c\u4f46\u662f2.3\u4e2d\u4f7f\u7528dijkstra\u8ba1\u7b97\u4e86\u4efb\u610f\u4e24\u70b9\u95f4\u7684\u8ddd\u79bb\uff0c\u57fa\u672c\u4e0a\u5df2\u7ecf\u5b8c\u6210\u4e8690%\u7684\u8def\u7531\u8ba1\u7b97\u529f\u80fd\uff0c\u5728\u5927\u4e8c\u5c42\u7f51\u7edc\u4e2d\u8fd9\u4e5f\u662f\u4e0d\u5c0f\u7684\u5f00\u9500\u3002<\/p>\n<ul><strong>3 \u8def\u7531\u8ba1\u7b97<\/strong><\/ul>\n<p> \u5f53\u5b8c\u6210\u62d3\u6251\u8ba1\u7b97\u540e\uff0cFL\u5728\u8fd0\u884c\u65f6\u53ef\u8ba1\u7b97\u8f93\u5165\u7684\u6570\u636e\u5305\u5e94\u8d70\u7684\u8def\u7531\u3002\u8fd9\u91cc\u8fd8\u9700\u8bf4\u660e\u4e00\u4e0b\uff0cFL\u7684\u67d0\u4e9b\u6a21\u5757\u76d1\u542cPACKET_IN\u6570\u636e\u5305\uff0cController\u6536\u5230\u8fd9\u4e2a\u6570\u636e\u5305\u540e\uff0c\u4f1a\u9010\u4e2a\u901a\u77e5\u8fd9\u4e9b\u6a21\u5757\uff0c\u8c03\u7528\u5176receive\u65b9\u6cd5\uff1a<\/p>\n<pre class=\"java\" name=\"code\"> \r\n                    for (IOFMessageListener listener : listeners) {\r\n                        pktinProcTime.recordStartTimeComp(listener);\r\n                        cmd = listener.receive(sw, m, bc);\r\n                        pktinProcTime.recordEndTimeComp(listener);\r\n\r\n                        if (Command.STOP.equals(cmd)) {\r\n                            break;\r\n                        }\r\n                    }\r\n<\/pre>\n<p>\u66f4\u8be6\u7ec6\u7684\u6a21\u5757\u52a0\u8f7d\u548c\u76d1\u542c\u673a\u5236\u53ef\u53c2\u8003\u6211\u4e4b\u524d\u5199\u7684<a href=\"http:\/\/blog.marvelplanet.tk\/?p=424\">\u8fd9\u7bc7\u6587\u7ae0http:\/\/blog.marvelplanet.tk\/?p=424<\/a><br \/>\n\u90a3\u4e48\u56de\u5230\u8def\u7531\u8ba1\u7b97\u8fd9\u90e8\u5206\u6765\uff0cController\u4f1a\u4f9d\u6b21\u8c03\u7528\u4ee5\u4e0b\u6a21\u5757\uff1a<br \/>\n  <strong>3.1 LinkDiscoveryManager\u94fe\u8def\u5904\u7406\u6a21\u5757<\/strong>\uff0c\u5982\u679c\u6570\u636e\u5305\u662fLLDP\u5904\u7406\u8be5\u6d88\u606f\uff0c\u5982\u6b65\u9aa41\u4e2d\u5728\u6b64\u5904\u4f1a\u6709\u5904\u7406\uff1b\u5982\u679c\u662f\u6b63\u5e38\u7684\u6570\u636e\u5305\u5219\u7565\u8fc7\uff0c\u6240\u4ee5\u8fd9\u91cc\u5ffd\u7565<br \/>\n  <strong>3.2 TopologyManager<\/strong>\u62d3\u6251\u7ba1\u7406\u6a21\u5757\uff0c\u67e5\u770b\u6e90\u7aef\u53e3\u5728TopologyInstance\u662f\u5426\u5141\u8bb8\u8f6c\u53d1<br \/>\n  <strong>3.3 DeviceManager\u8bbe\u5907\u6a21\u5757<\/strong>\uff0c\u901a\u8fc7\u6e90\u76eeSW\u7684id\u548cport\u76f8\u8fde\u7684device\u627e\u5230\u6e90\u8bbe\u5907\u548c\u76ee\u7684\u8bbe\u5907\uff0c\u5982\u627e\u4e0d\u5230\u5219\u653e\u5f03\uff0c\u5426\u5219\u6682\u5b58\u5165\u4e00\u4e2a\u4e0a\u4e0b\u6587\u7ed3\u6784context<br \/>\n  <strong>3.4 Firewall\u9632\u706b\u5899\u6a21\u5757<\/strong>\uff0c\u5224\u65ad\u8be5\u6570\u636e\u5305\u7684\u6e90\u76ee\u7684\u4e3b\u673a\u662f\u5426\u53ef\u4ee5\u901a\u4fe1\uff0c\u5982\u4e0d\u5728\u89c4\u5219\u8868\u4e2d\u5219\u7ee7\u7eed<br \/>\n  <strong>3.5 LoadBalancer\u8d1f\u8f7d\u5747\u8861\u6a21\u5757<\/strong>\uff0c\u5982\u662fARP\u6570\u636e\u5305\u5219\u67e5\u770b\u662f\u5426\u5728vipIPToId\u4e2d\uff0c\u5982\u4e0d\u5728\u5219\u7ee7\u7eed\u3002\u8fd9\u91cc\u5173\u7cfb\u4e0d\u5927\uff0c\u5ffd\u7565\u3002<br \/>\n  <strong>3.6 ForwardBase\u8def\u7531\u6a21\u5757<\/strong>\uff0c\u9996\u5148\u5728\u4e0a\u4e0b\u6587context\u67e5\u627e\u4e4b\u524d\u6a21\u5757\u662f\u5426\u5df2\u6709\u8def\u7531\u7b56\u7565\uff0c\u5982\u65e0\u5219\u68c0\u67e5\u662f\u5426\u6570\u636e\u5305\u662f\u5e7f\u64ad\u7684\uff0c\u5982\u662f\u5219Flood\u3002\u5426\u5219\u8c03\u7528doForwardFlow\uff0c\u6211\u4eec\u4e3b\u8981\u770b\u8fd9\u4e2a\u65b9\u6cd5\uff0c\u5177\u4f53\u7684\uff0c\u4ece\u4e0a\u4e0b\u6587\u4e2d\u83b7\u53d63.3\u4e2d\u89e3\u6790\u7684\u6e90\u76ee\u7684\u4e3b\u673a\u4fe1\u606f\uff0c\u5982\u679c\u4e0d\u5728\u540c\u4e00\u4e2ailand\u4e0a\uff08\u6211\u7684\u7406\u89e3\u662f\u8fd9\u4e24\u53f0\u4e3b\u673a\u5728FL\u7684\u77e5\u8bc6\u5e93\u4e2d\u6ca1\u6709\u8def\u5f84\uff0c\u4e5f\u8bb8\u4e2d\u95f4\u6709\u522b\u7684\u4f20\u7edf\u65b9\u6cd5\u76f8\u8fde\uff0c\u4e5f\u8bb8\u6839\u672c\u4e0d\u76f8\u8fde\uff09\uff0c\u5219Flood\uff1b\u5982\u679c\u5728\u540c\u4e00\u4e2a\u7aef\u53e3\uff0c\u90a3\u5c31\u662f\u540c\u4e00\u53f0\u4e3b\u673a\uff0c\u5219\u653e\u5f03\uff1b\u5426\u5219\u8c03\u7528routingEngine.getRoute\u83b7\u5f97\u8def\u7531\u3002\u8fd9\u4e2a\u624d\u662f\u6700\u91cd\u8981\u7684\uff0c\u4e5f\u662f2.4\u4e2d\u6ca1\u6709\u5b8c\u6210\u7684\u6700\u7ec8\u90e8\u5206\uff0c\u8fd9\u91cc\u4f7f\u7528\u4e86TopologyInstance\u7684getRoute\u65b9\u6cd5\uff0c\u4f7f\u75282.4\u7684\u65b9\u6cd5\u8ba1\u7b97\u51fa\u8def\u7531\u8def\u5f84\uff0c\u7136\u540e\u8c03\u7528\u5c06\u8def\u7531\u6240\u5bf9\u5e94\u7684\u8def\u5f84\u63a8\u9001\u7ed9\u4ea4\u6362\u673a\uff0c\u5982\u679c\u662f\u591a\u8df3\u8def\u5f84\uff0c\u5219\u5c06\u8def\u7531\u7b56\u7565\u63a8\u9001\u7ed9\u8be5\u8def\u5f84\u4e0a\u7684\u6240\u6709\u4ea4\u6362\u673a\uff08ForwardBase.pushRoute()\uff09\u3002<\/p>\n<p>\u6700\u540e\u7ed9\u51fa\u4e00\u4e2a\u573a\u666f\u5427\uff0c\u5047\u5b9ah1\u548ch2\u662f\u4e3b\u673a\uff0cs1\u3001s2\u548cs3\u662f\u4ea4\u6362\u673a\uff0c\u62d3\u6251\u662fh1-s1-s2-s3-h2\u3002\u5f53h1 ping h2\uff0c\u9996\u5148h1\u53d1\u9001ARP\u5305\uff0c\u7531\u4e8e\u8be5\u6570\u636e\u5305\u662f\u5e7f\u64ad\u7684\uff0c\u90a3\u4e48\u6700\u7ec8ForwardBase\u4f1a\u6267\u884cdoFlood\uff0c\u6240\u6709\u4ea4\u6362\u673a\u90fd\u4f1a\u5e7f\u64ad\u8fd9\u4e2a\u6570\u636e\u5305\uff0c\u6700\u540eh2\u6536\u5230s3\u5e7f\u64ad\u7684\u7684ARP\u8bf7\u6c42\u540e\uff0c\u5411h1\u53d1\u9001ARP\u54cd\u5e94\u3002h1\u6536\u5230ARP\u54cd\u5e94\u540e\u53d1\u9001ping\u8bf7\u6c42\uff0c\u8be5\u5305\u5728\u4ea4\u6362\u673a\u4ee5PACKET_IN\u7684\u5f62\u5f0f\u53d1\u9001\u7ed9floodlight\uff0c\u6b64\u65f6floodlight\u77e5\u9053h1\u6240\u5728\u7684\u4ea4\u6362\u673as3\uff0c\u6240\u4ee5\u8c03\u7528doForwardFlow\uff0c\u8ba1\u7b97\u51fa<br \/>\ns1\u5230s3\u7684\u8def\u5f84s1->s2\uff0cs2->s3\uff0c\u7136\u540e\u5c06OFFlowMod\u547d\u4ee4\u53d1\u9001\u7ed9s1\u3001s2\u548cs3\u3002\u6700\u7ec8\u6570\u636e\u5305\u901a\u8fc7s1\u3001s2\u548cs3\u76f4\u63a5\u88ab\u53d1\u9001\u5230h2\uff0c\u641e\u5b9a\u3002<\/p>\n<p>p.s.1 Floodlight\u5728\u8ba1\u7b97\u62d3\u6251calculateShortestPathTreeInClusters\u65f6\uff0c\u9996\u5148\u4f1a\u5c06\u6240\u6709\u7684\u8def\u5f84\u7f6e\u4e3a\u5931\u6548\uff0c\u7136\u540e\u5728\u8ba1\u7b97\u6240\u6709\u4e24\u70b9\u95f4\u8ddd\u79bb\uff0c\u5982\u679c\u6bcf\u6b21\uff08\u95f4\u9694\u4e3a500ms\uff09\u5b58\u5728\u4e00\u6761\u94fe\u8def\u53d8\u52a8\uff0c\u90a3\u4e48\u5c31\u9700\u8981\u91cd\u505a\u6240\u6709\u8ba1\u7b97\uff0c\u5728\u5927\u4e8c\u5c42\u7f51\u7edc\u4e2d\u4f1a\u4e0d\u4f1a\u51fa\u73b0\u6027\u80fd\u74f6\u9888\uff1f<br \/>\np.s.2 Floodlight\u7684\u8ba1\u7b97\u51fa\u8def\u7531\u540e\uff0c\u4e0b\u53d1\u7684\u6d41\u53ea\u5305\u62ec\u6e90\u76ee\u7684\u4e3b\u673a\u7684mac\uff0c\u6d41\u7684\u5176\u4ed6\u5b57\u6bb5\u90fd\u662f\u901a\u914d\u7b26\uff0c\u8fd9\u4e48\u505a\u7684\u903b\u8f91\u5e94\u8be5\u662f\u201c\u6211\u53ea\u505a\u8def\u7531\u548c\u8f6c\u53d1\u529f\u80fd\uff0c\u522b\u7684\u4e0d\u7528\u63a7\u5236\u201d\u3002\u8fd9\u6837\u4f1a\u7ed9\u5317\u5411\u7684APP\u9020\u6210\u5f88\u5927\u7684\u9ebb\u70e6\uff0c\u4f8b\u5982\u5728\u505aDDoS\u7684\u9632\u5fa1\u65f6\uff0c\u9700\u8981\u68c0\u67e5\u6bcf\u6761\u6d41\u7684\u76ee\u7684\u7aef\u53e3\uff0c\u5982\u679c\u6d41\u7684dst_transport_addr\u662f*\u7684\u8bdd\uff0c\u663e\u7136\u65e0\u6cd5\u68c0\u6d4b\u653b\u51fb\uff0c\u751a\u81f3\u8fdeFL\u81ea\u5e26\u7684Firewall\u90fd\u529b\u4e0d\u4ece\u5fc3\u3002<br \/>\np.s. 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switch\uff0c\u4e0d\u518d\u8d58\u8ff0\u3002 \u9996\u5148\u8c08\u4e00\u4e0bSDN\u63a7\u5236\u5668\u7684\u8def\u7531\u539f\u7406\uff1a\u5f53\u4ea4\u6362\u673a\u6536\u5230\u4e00\u4e2a\u4e0d\u80fd\u88ab\u5f53\u524d\u6d41\u8868\u5404\u6761\u6d41\u5339\u914d\u7684\u6570\u636e\u5305\u65f6\uff0c\u4f1a\u628a\u8fd9\u4e2a\u6570\u636e\u5305\u4ee5openflow\u7684\u683c\u5f0f\uff08PACKET_IN\uff09\u53d1\u9001\u7ed9\u63a7\u5236\u5668\u3002\u63a7\u5236\u5668\u7ecf\u8fc7\u8def\u7531\u51b3\u7b56\u540e\uff0c\u540c\u6837\u4ee5openflow\u7684\u683c\u5f0f\uff08PACKET_OUT\uff09\u7684\u65b9\u5f0f\u5c06\u8be5\u6570\u636e\u5305\u7684\u4e0b\u4e00\u8df3\u4fe1\u606f\u56de\u7ed9\u8be5\u4ea4\u6362\u673a\u3002 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\u9996\u5148\u62d3\u6251\u7ba1\u7406\u542f\u52a8\uff08TopologyManager.startUp()\uff09\u65f6\u65b0\u8d77\u4e00\u4e2a\u7ebf\u7a0bUpdateTopologyWorker\uff0c\u95f4\u9694500ms\u91cd\u590d\u8fd0\u884c \u3002 2.2 \u66f4\u65b0\u62d3\u6251 \u5982\u679c\u4e4b\u524d\u5728\u7b2c\u4e00\u6b65\u4e2d\u6709\u4e00\u4e9b\u94fe\u8def\u3001\u4ea4\u6362\u673a\u7b49\u66f4\u65b0\uff0c\u90a3\u4e48LDUpdates\u961f\u5217\u4e2d\u4f1a\u6709\u5143\u7d20\uff0c\u90a3\u4e48\u4f9d\u6b21\u53d6\u51fa\u8fd9\u4e9b\u94fe\u8def\u66f4\u65b0\u7684\u5143\u7d20\uff08TopologyManager.updateTopology()\/TopologyManager.applyUpdates()\uff09\uff0c\u5224\u65ad\u5176\u7c7b\u578b\uff08\u5982\u94fe\u8def\u66f4\u65b0\/\u5220\u9664\u3001\u7aef\u53e3\u589e\u52a0\/\u5220\u9664\uff09\uff0c\u8fdb\u884c\u54cd\u5e94\u5904\u7406\u3002 \u4ee5\u94fe\u8def\u66f4\u65b0\u4e3a\u4f8b\uff0c\u8c03\u7528TopologyManager.addOrUpdateLink()\u65b9\u6cd5\uff0c\u5224\u65ad\u94fe\u8def\u7c7b\u578b\uff08\u591a\u8df3\u3001\u5355\u8df3\u6216\u96a7\u9053\uff09\uff0c\u518d\u628alink\u6dfb\u52a0\u5230\u76f8\u5e94\u4ea4\u6362\u673a\u7684\u7aef\u53e3\u4e2d\uff0c\u5982\u679c\u662f\u591a\u8df3\u7684\u5219\u518d\u5220\u9664\u53ef\u80fd\u7684\u5355\u8df3link 2.3 \u8ba1\u7b97\u62d3\u6251\u8def\u5f84 \u6bcf\u6b21\u65b0\u5efa\u4e00\u4e2a\u5b9e\u4f8b\uff08TopologyManager.createNewInstance()\uff09\uff0c\u521d\u59cb\u5316\u8fc7\u7a0b\u4e2d\u8ba1\u7b97\u62d3\u6251\u8def\u5f84\uff08TopologyInstance.compute()\uff09\uff0c\u5177\u4f53\u5730\uff1a 2.3.1 \u5f52\u7c7b \u5c06\u73b0\u6709\u6240\u6709\u76f8\u8fde\u7684link\u7f6e\u4e8e\u540c\u4e00\u4e2a\u7c07\u4e2d\uff0c\u4ece\u800c\u5f62\u6210\u591a\u4e2a\u7c07\u7ed3\u6784\uff08identifyOpenflowDomains()\uff09 2.3.2 \u5efa\u7c07 \u904d\u5386\u6240\u6709link\uff08addLinksToOpenflowDomains()\uff09\uff0c\u5982\u679clink\u8fde\u63a5\u7684\u662f\u540c\u4e00\u4e2a\u7c07\uff0c\u5219\u5c06\u5176\u52a0\u5165\u8be5\u7c07\uff0c\u6240\u4ee5\u8be5\u65b9\u6cd5\u7edf\u8ba1\u4e86\u6240\u6709\u7c07\u5185\u7684link\u3002FL\u8fd9\u4e48\u505a\u4e5f\u662f\u51cf\u5c11\u8def\u7531\u8ba1\u7b97\u7684\u5f00\u9500\uff0c\u4e0d\u7136\u82e5\u5e72\u4e2a\u5927\u4e8c\u5c42\u7f51\u7edc\u4e2d\u5171\u6709n\u4e2a\u8282\u70b9\uff0c\u5c31\u9700\u8981n\u5e73\u65b9\u7684\u5b58\u50a8\u5f00\u9500\uff0c\u8ba1\u7b97\u6548\u7387\u4e5f\u4f1a\u4e0b\u964d\uff0c\u5982\u679c\u5c06\u4e0d\u76f8\u8fde\u7684\u8282\u70b9\u5206\u5f00\u5c31\u51cf\u5c11\u4e86\u4e0a\u8ff0\u5f00\u9500\u3002 2.3.3 \u904d\u5386\u6240\u6709\u7c07 \u5bf9\u4e8e\u6bcf\u4e2a\u7c07\u5185sw\uff0c\u5f62\u6210\u4e00\u4e2aBroadcastTree\u7ed3\u6784\uff08\u5305\u62ec\u4e24\u4e2a\u5c5e\u6027\uff1acost\u8bb0\u5f55\u5230\u5176\u4ed6\u7c07\u5185sw\u7684\u8def\u5f84\u957f\u5ea6\uff0clinks\u8bb0\u5f55\u5176\u4ed6sw\u7684link\uff09\uff0c\u6700\u7ec8\u5c06\u4fe1\u606f\u4fdd\u5b58\u5230destinationRootedTrees\u4e2d\uff08caculateShortestPathTreeInClusters ()\u548ccalculateBroadcastNodePortsInClusters()\uff09\uff0c\u6838\u5fc3\u601d\u60f3\u5c31\u662f\u4f7f\u7528dijkstra\u8ba1\u7b97\u7c07\u5185\u4efb\u610f\u4e24\u70b9\u7684\u6700\u77ed\u8def\u5f84\uff0c\u4fdd\u5b58\u5230\u8be5\u70b9\u7684cost\u548c\u4e0b\u4e00\u8df3\u3002 2.4 \u5b9a\u4e49\u8def\u5f84\u8ba1\u7b97\u6a21\u5f0f \u8fd9\u6837\uff0cFL\u5c31\u83b7\u5f97\u4e86\u4ece\u4e00\u4e2a\u70b9\u51fa\u53d1\u6240\u6709\u76f8\u8fde\u7684\u6240\u6709\u8def\u5f84\u548c\u70b9\u3002\u90a3\u4e48\u53ea\u8981\u7ed9\u5b9a\u4e00\u4e2a\u6e90SW\u8282\u70b9\u548c\u4e00\u4e2a\u76ee\u7684SW\u8282\u70b9\uff0c\u90a3\u5c31\u80fd\u77e5\u9053\u8fd9\u4e24\u8005\u95f4\u7684\u6700\u77ed\u8def\u5f84\u957f\u5ea6\u548c\u3002\u65e9\u57282.3\u5f00\u59cbTopologyInstance\u5728\u5b9a\u671f\u65b0\u5efa\u5b9e\u4f8b\u65f6\uff0c\u5c31\u5b9a\u4e49\u4e86\u6839\u636e\u62d3\u6251\u8ba1\u7b97\u8def\u5f84\u7684\u65b9\u6cd5\uff1a pathcache = CacheBuilder.newBuilder().concurrencyLevel(4) .maximumSize(1000L) .build( new CacheLoader() { public Route load(RouteId rid) { return pathCacheLoader.load(rid); &hellip; <a href=\"https:\/\/marvelliu.space\/?p=478\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> 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