{"id":782,"date":"2025-07-01T10:19:08","date_gmt":"2025-07-01T02:19:08","guid":{"rendered":"https:\/\/asahiya.cn\/?p=782"},"modified":"2025-07-01T16:29:56","modified_gmt":"2025-07-01T08:29:56","slug":"hcia-datacom-stp","status":"publish","type":"post","link":"https:\/\/asahiya.cn\/index.php\/2025\/07\/01\/hcia-datacom-stp\/","title":{"rendered":"HCIA-Datacom\u2014\u2014\u2014\u2014\u2014\u2014STP"},"content":{"rendered":"\t\t
\n\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

\u5c40\u57df\u7f51\u4e8c\u5c42\u6280\u672f\u7684\u6f14\u8fdb
1\u3001AR1:172.16.12.1\/24————————172.16.12.2\/24 AR2\uff0c\u53ef\u4ee5ping\u901a
2\u3001AR1:172.168.12.1\/24———sw———172.16.12.2\/24 AR2\uff0c\u53ef\u4ee5ping\u901a
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u4ea4\u6362\u539f\u7406\uff0cVLAN
3\u3001AR1:172.168.12.1\/24——–sw1——sw2—–172.16.12.2\/24 AR2\uff0c\u53ef\u4ee5ping\u901a
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0A\u00a0 \u00a0 \u00a0 \u00a0 T\u00a0 \u00a0 \u00a0T\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 A\u00a0
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\u00a0 \u00a0 \u00a0 \u95ee\u9898\uff1a\u5355\u70b9\u6545\u969c
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u89e3\u51b3\u65b9\u6848\uff1a\u5197\u4f59\uff08\u5bb9\u9519\uff09
4\u3001AR1:172.168.12.1\/24——–sw1——sw2—–172.16.12.2\/24 AR2\uff0c\u53ef\u4ee5ping\u901a
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 |\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0|\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0|\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 |
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\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014sw3\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014-
\u00a0 \u00a0 \u00a0 \u00a0\u95ee\u9898\uff1a
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u5c40\u57df\u7f51\u4e8c\u5c42\u51fa\u73b0\u73af\u8def
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\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u5c40\u57df\u7f51\u4e8c\u5c42\u51fa\u73b0mac\u5730\u5740\u6296\u52a8
\u00a0 \u00a0 \u00a0 \u00a0\u6839\u672c\u672c\u8d28\uff1a\u73af\u8def\uff0c\u5982\u4f55\u89e3\u51b3\u73af\u8def\u95ee\u9898
\u00a0 \u00a0 \u00a0 \u00a0 \u65b9\u68481\uff1asmart-link
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u628a\u4ea4\u6362\u673a\u7684\u591a\u4e2a\u63a5\u53e3\u653e\u5165\u4e00\u4e2asmart-link\u7684group\uff0c\u9009\u4e3e\u4e00\u4e2a\u4e3amaster\u7aef\u53e3\u8f6c\u53d1\u6570\u636e\uff0c\u5176backup\u4e0d\u8f6c\u53d1
\u00a0 \u00a0 \u00a0 \u00a0AR1:172.168.12.1\/24——–sw1——sw2—–172.16.12.2\/24 AR2\uff0c\u53ef\u4ee5ping\u901a
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 |\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0|\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0|\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 |
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 |\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0|\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0|\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 |
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014sw3\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014-
\u00a0 \u00a0 \u00a0 \u89c4\u5219\uff1a\u4e00\u65e6master\u7aef\u53e3down\u4e86\uff0cbackup\u7acb\u5373\u8f6c\u53d1
\u00a0 \u00a0 \u00a0 \u4f18\u70b9\uff1a\u7b80\u5355\uff0c\u653e\u73af\uff0c\u9002\u5408\u4e2d\u5c0f\u7f51\u7edc
\u00a0 \u00a0 \u00a0 \u7f3a\u70b9\uff1a\u5bf9\u4e8e\u4e2d\u5927\u578b\u7f51\u7edc\uff0c\u4e0d\u5408\u9002<\/p>

\u65b9\u68482\uff1axSTP\uff08STP\/RSTP\/MSTP\uff09\u751f\u6210\u6811\u534f\u8bae\uff08spanning tree protocol\uff09
\u00a0 \u00a0 \u00a0 \u4f18\u70b9\uff1a
\u00a0 \u00a0 \u00a0 \u00a01\u3001\u653e\u73af
\u00a0 \u00a0 \u00a0 \u00a02\u3001\u5197\u4f59\uff08\u5907\u4efd\uff09
\u00a0 \u00a0 \u00a0 \u00a03\u3001\u5feb\u901f\u5207\u6362\uff08RSTP\uff0c\u79d2\u5207\uff09
\u00a0 \u00a0 \u00a0 \u00a04\u3001\u6700\u4f18\u8def\u5f84\uff08cost\u503c\uff0c\u8ddf\u5e26\u5bbd\u6210\u53cd\u6bd4\uff09
\u00a0 \u00a0 \u00a0 \u00a05\u3001\u8d1f\u8f7d\uff1a\u57fa\u4e8e\u8bbe\u5907\u7684\u8d1f\u8f7d\uff08MSTP\uff09
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u57fa\u4e8e\u94fe\u8def\u8d1f\u8f7d\uff08Eth-trunk\uff09
\u00a0 \u00a0 \u00a0 \u00a06\u3001\u9694\u79bb\u548c\u4e2a\u6027\u5316\u9009\u8def\uff08MSTP\uff09
\u00a0 \u00a0 \u00a0 \u00a0\u7f3a\u70b9:
\u00a0 \u00a0 \u00a0 \u00a01\u3001\u5728\u5927\u578b\u62d3\u6251\u4e2d\u6d88\u8017\u8d44\u6e90\u8f83\u591a
\u00a0 \u00a0 \u00a0 \u00a02\u3001\u7a33\u5b9a\u6027\u4e0d\u591f\uff0c\u5bb9\u6613\u9020\u6210\u8bef\u5224<\/p>

\u65b9\u68483\uff1a\u5806\u53e0\uff0c\u6a2a\u5411\u865a\u62df\u5316\u6280\u672f
\u00a0 \u00a0 \u6846\u5f0f\u5806\u53e0\uff1aCSS
\u00a0 \u00a0 \u76d2\u5f0f\u5806\u53e0\uff1aistack
\u00a0 \u00a0 \u00a0\u573a\u666f\uff1a\u56ed\u533a\u7f51<\/p>

\u65b9\u68483\u7684\u53d8\u79cd\uff1aM-LAG\uff1a\u6a2a\u5411\u865a\u62df\u5316\u6280\u672f
\u00a0 \u00a0 \u00a0\u573a\u666f\uff1aDCN\u6570\u636e\u4e2d\u5fc3\u7f51\u7edc<\/p>

\u65b9\u68484\uff1aNV03\uff1aNetwork Virtualization over layer 3 ==VxLAN\uff08EVPN\uff09
\u00a0 \u00a0 \u00a0 \u573a\u666f\uff1aDCN\u00a0
\u00a0 \u00a0 \u00a0 O3\uff1aover layer 3=== underlayer\uff0c\u4e0b\u5c42\uff0c3\u5c42\u7f51\u7edc\uff08\u65e0\u73af\uff09CLOS\u80d6\u6811\u67b6\u6784
\u00a0 \u00a0 \u00a0 NV\uff1a\u7f51\u7edc\u865a\u62df\u5316=====overlayer\uff0c\u4e0a\u5c42\uff0c\u9488\u5bf9\u4e0d\u540c\u79df\u6237\u5728\u7269\u7406\u8bbe\u5907\u4e0a\u4ea7\u751f\u865a\u62df\u8bbe\u5907
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u7269\u7406\u4ea4\u6362\u673avs\u865a\u62df\u4ea4\u6362\u673a===BD\uff08mac\u8868\uff09
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u7269\u7406\u8def\u7531\u5668vs\u865a\u62df\u8def\u7531\u5668===VRF\uff08\u8def\u7531\u8868\uff09
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u7269\u7406\u9632\u706b\u5899vs\u865a\u62df\u9632\u706b\u5899===FW vsys\uff08\u9632\u706b\u5899\u5b50\u7cfb\u7edf\uff0c\u4f1a\u8bdd\u8868\u3002\u3002\u3002\uff09
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u7269\u7406\u8d1f\u8f7d\u5747\u8861vs\u865a\u62df\u8d1f\u8f7d\u5747\u8861==vlB\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

STP\uff1aspanning tree protocol \u751f\u6210\u6811\u534f\u8bae
\u00a0 \u00a0 \u00a0 \u00a0 \u4f18\u70b9\uff1a
\u00a0 \u00a0 \u00a0 \u00a0 1\u3001\u653e\u73af
\u00a0 \u00a0 \u00a0 \u00a0 2\u3001\u5197\u4f59\uff08\u5907\u4efd\uff09
\u00a0 \u00a0 \u00a0 \u00a0 3\u3001\u6700\u4f18\u8def\u5f84<\/p>

\u89d2\u8272\uff1a
\u00a0 \u00a0 \u00a0 \u00a0 \u00a01\u3001\u4ea4\u6362\u673a\u89d2\u8272
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0ROOT\uff1a\u6839\uff0c\u6839\u6865\uff0c\u6839\u4ea4\u6362\u673a\uff0c\u6709\u4e14\u53ea\u6709\u4e00\u4e2a
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u9009\u4e3e\u6839\u4ea4\u6362\u673a\u7684\u89c4\u5219\uff1aBID\u6700\u5c0f\u7684\u4ea4\u6362\u673a
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0BID bridge id: priority 2\u5b57\u8282+mac\u5730\u57406\u5b57\u8282=8\u5b57\u8282
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u4f18\u9009priority\u5c0f\u7684===\u4eba\u4e3a\u5e72\u9884
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u5982\u679cpriority\u60f3\u540c\uff0c\u4f18\u5148mac\u5730\u5740\u5c0f===\u9ed8\u8ba4\u968f\u673a
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u534e\u4e3a\u7684STP=CST:common STP\u516c\u5171\u751f\u6210\u6811\uff0c\u6240\u6709vlan\u5171\u4eab\u4e00\u4e2aSTP
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u601d\u79d1\u7684STP=PVST\uff1aper vlan stp,\u4e0d\u662fCST\uff0c\u662fMST
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u95ee\u9898\uff1a
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 SW1\uff1avlan 10\u7684BID:32768+SW1m
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 SW1\uff1avlan 20\u7684BID:32768+SW1m
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u89e3\u51b3\u65b9\u6848\uff0c\u5728BID\u4e2d\u589e\u52a0\u6269\u5c55\u7cfb\u7edfid:extended system id<\/p>

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0Priority +extended system id +mac\u5730\u5740
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a04bit\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 12bit\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 48bit
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a032768\u00a0 \u00a0+\u00a0 10\u00a0 +\u00a0 SW1mac
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a032768\u00a0 \u00a0+\u00a0 20\u00a0 +SW1mac<\/p>

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 extended system id\u5728PVST\u662fvlan id\uff0c\u4e00\u4e2avlan\u4e00\u68f5\u6811
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 extended system id\u5728MSTP\u662finstance id\uff0c\u4e00\u4e2a\u5b9e\u4f8b\u4e00\u68f5\u6811<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t
\u00a0<\/th>\u5171\u6709\uff08\u534e\u4e3a\uff09<\/th>\u601d\u79d1<\/th><\/tr><\/thead>
STP<\/td>802.1D
\u4f18\u70b9\uff1a
1\u3001\u9632\u73af
2\u3001\u5197\u4f59
3\u3001\u6700\u4f18\u8def\u5f84
4\u3001\u8d1f\u8f7d<\/del>
\u5207\u6362\uff1a30”\/50”
\u95ee\u9898\uff1a\u5207\u6362\u901f\u5ea6\u592a\u6162<\/td>		PVST:\u4e00\u4e2avlan 802.1D stp
\u4f18\u70b9\uff1a
1\u3001\u9632\u73af
2\u3001\u5197\u4f59
3\u3001\u6700\u4f18\u8def\u5f84
4\u3001\u8d1f\u8f7d
\u5207\u6362\uff1a0”\/30”
PVST+:
Portfast\/uplinkfast\/backbone fast
\u5207\u6362\u901f\u5ea6\u6709\u4f18\u5316\uff0c\u4f46\u662f\u8fd8\u662f\u6162<\/td><\/tr>
RSTP<\/td>802.1w\uff1a\u5feb\u901f\u751f\u6210\u6811
Rapid spanning tree protocol
\u4f18\u70b9\uff1a
1\u3001\u9632\u73af
2\u3001\u5197\u4f59
3\u3001\u6700\u4f18\u8def\u5f84
4\u3001\u5feb\u901f\u5207\u6362\uff1a\u79d2\u5207
5\u3001\u8d1f\u8f7d\uff1aCST<\/del>
\u7f3a\u70b9\uff1a\u8d1f\u8f7d
\u89e3\u51b3\u65b9\u6848\uff0c\u4eceCST->MST<\/td>		rapid PVST
\u4f18\u70b9\uff1a
1\u3001\u9632\u73af
2\u3001\u5197\u4f59
3\u3001\u6700\u4f18\u8def\u5f84
4\u3001\u5feb\u901f\u5207\u6362\uff1a\u79d2\u5207
5\u3001\u8d1f\u8f7d\uff1aCST
\u7f3a\u70b9\uff1a
\u5f53vlan\u6570\u91cf\u8d85\u8fc71000\u7684\u65f6\u5019\uff0cPVST\u8d44\u6e90\u6d88\u8017\u6781\u5927<\/td><\/tr>
MSTP<\/td>802.1s:\u591a\u751f\u6210\u6811
\u4f18\u70b9\uff1a
1\u3001\u9632\u73af
2\u3001\u5197\u4f59
3\u3001\u6700\u4f18\u8def\u5f84
4\u3001\u5feb\u901f\u5207\u6362\uff1a\u79d2\u5207
5\u3001\u8d1f\u8f7d\uff1a\u57fa\u4e8e\u8bbe\u5907\u8d1f\u8f7d<\/td>		MIST:\u591a\u5b9e\u4f8b\u751f\u6210\u6811
\u4f18\u70b9\uff1a
1\u3001\u9632\u73af
2\u3001\u5197\u4f59
3\u3001\u6700\u4f18\u8def\u5f84
4\u3001\u5feb\u901f\u5207\u6362\uff1a\u79d2\u5207
5\u3001\u8d1f\u8f7d\uff1a\u57fa\u4e8e\u8bbe\u5907\u8d1f\u8f7d<\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

2\u3001\u7aef\u53e3\u89d2\u8272
\u00a0 \u00a0 \u00a0 1\uff09DP\uff1a\u6307\u5b9a\u7aef\u53e3\uff1adesignated port
\u00a0 \u00a0 \u00a0 2) RP:\u6839\u7aef\u53e3\uff1aroot port,\u6570\u636e\uff0c\u6536\u53d1\uff0cBPDU\uff1a\u6536
\u00a0 \u00a0 \u00a0 3\uff09\u65e2\u4e0d\u662f\u6839\u7aef\u53e3\u53c8\u4e0d\u662f\u6307\u5b9a\u7aef\u53e3\uff0c\u5c06\u4f1a\u963b\u585e
\u00a0 \u00a0BPTU:
\u00a0 \u00a01\u3001protocol id:\u9ed8\u8ba40000—-STP
\u00a0 \u00a02\u3001version id
\u00a0 \u00a0 \u00a0 0\uff1aSTP
\u00a0 \u00a0 \u00a0 2\uff1aRSTP
\u00a0 \u00a0 \u00a0 3\uff1aMSTP
\u00a0 \u00a03\u3001BPDU type:
\u00a0 \u00a0 \u00a0 1)configuration:\u914d\u7f6ebptu\uff0c\u7531\u6839\u4ea7\u751f\uff0c\u5176\u4ed6\u975e\u6839\u4ea4\u6362\u673a\u8f6c\u53d1
\u00a0 \u00a0 \u00a0 2\uff09TCN\uff1atopology change notification:\u62d3\u6251\u53d8\u66f4\u901a\u544a===TCM\uff08\u62d3\u6251\u53d8\u66f4\u673a\u5236\uff09
\u00a0 \u00a04\u3001FLAG\uff1a
\u00a0 \u00a0 \u00a0 1\uff09TCA\uff1atoplogy change acknowledge:\u62d3\u6251\u53d8\u66f4\u901a\u544a\u6536\u5230\u786e\u8ba4
\u00a0 \u00a0 \u00a0 2\uff09TC\uff1atoplogy change:\u62d3\u6251\u53d8\u66f4
\u00a0 \u00a0==================STP\u9009\u8def\u539f\u5219===================
\u00a0 \u00a05\u3001RID\uff1aROOT ID\uff1a\u6839ID=BID
\u00a0 \u00a06\u3001RPC\uff1aroot path cost,\u6839\u8def\u5f84\u5f00\u9500
\u00a0 \u00a07\u3001BID\uff1asender BID
\u00a0 \u00a08\u3001port id:priority+port-id
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 Local port-id:
\u00a0 \u00a0=================STP time\u8ba1\u65f6\u5668==================
\u00a0 \u00a09\u3001max-age:\u6700\u5927\u8001\u5316\u65f6\u95f4\uff0c20\u79d2
\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u9ed8\u8ba4\u6700\u59277\u5c42\uff1a2*7+3*2=20\u79d2
\u00a0 \u00a010\u3001hello:2\u79d2\u00a0
\u00a0 \u00a011\u3001forwarding de;ay:\u8f6c\u53d1\u5ef6\u65f6\uff0cstp\u7aef\u53e3\u72b6\u6001\u5207\u6362\u989c\u8272\uff1a15\u79d2
\u00a0 \u00a0 \u00a0 STP\u7aef\u53e3\u72b6\u6001\uff1a
\u00a0 \u00a0 \u00a0 disable
\u00a0 \u00a0 \u00a0 Blocking
\u00a0 \u00a0 \u00a0 Listening
\u00a0 \u00a0 \u00a0 ||
\u00a0 \u00a0 \u00a0 forwarding delay 15\u79d2
\u00a0 \u00a0 \u00a0 ||
\u00a0 \u00a0 \u00a0 learning
\u00a0 \u00a0 \u00a0 ||
\u00a0 \u00a0 \u00a0 forwarding delay 15\u79d2
\u00a0 \u00a0 \u00a0 ||
\u00a0 \u00a0 \u00a0 forwarding<\/p>

stp\u9009\u4e3e\u8fc7\u7a0b
1\u3001\u6bcf\u6bb5\u5148\u9009DP
\u00a0 \u00a0 \u00a0 \u5f53\u4e00\u4e2a\u4ea4\u6362\u673a\u6240\u6709\u7aef\u53e3\u7684bptu\u90fd\u6ca1\u6709\u5457\u4fee\u6539\uff08\u672c\u4ea4\u6362\u673a\u81ea\u5df1\u7684BPDU\uff09\uff0c\u4ed6\u5c31\u662f\u6839SW

\"\"<\/div>
2\u3001\u975e\u6839\u4ea4\u6362\u673a\u8981\u9009\u4e3e\u4e00\u4e2a\u6839\u7aef\u53e3\uff1a
\u00a0 \u00a0 \u00a0 \u00a0\u5f53\u6839\u7aef\u53e3\u8fd8\u6ca1\u6709\u9009\u51fa\u6765—–\u521d\u59cb\u5316\uff0c\u901a\u8fc7RID\u5c31\u80fd\u6bd4\u51fa\u6765\u4e86
\u00a0 \u00a0 \u00a0 \u00a0\u5f53\u6839\u7aef\u53e3\u9009\u51fa\u6765\u4ee5\u540e——\u6b63\u5e38\u5316\uff0c\u901a\u8fc7cost\u6765\u903c\u51fa\u6765\u7684<\/p>

\u95ee\u9898\uff1a\u9ed8\u8ba4\u7684\u9009\u4e3e\u4e0d\u7b26\u5408\u5f53\u524d\u7684\u9700\u6c42\uff1a
\u00a0 \u00a01\u3001\u4fee\u6539\u6839\uff1a\u5927\u8c03
\u00a0 \u00a0 \u00a0 \u7acb\u7aff\u89c1\u5f71
\u00a0 \u00a0 \u00a0 SW1\uff1a
\u00a0 \u00a0 \u00a0 stp priority 0<\/p>

\u00a0 \u00a02\u3001\u4fee\u6539\u6839\uff1a
\u00a0 \u00a0 \u00a0 stp root primary \u4e3b\u6839————–priority 0
\u00a0 \u00a0 \u00a0 stp root secondary \u5907\u4efd\u6839————–priority 4096<\/p>

\u00a0 \u00a02\u3001\u4fee\u6539\u94fe\u8def\uff1a

\"\"<\/div>
\u00a0 \u00a0 \u00a0 \u5728dp\u53e3\u914d\u7f6eport priority
\u00a0 \u00a0 \u00a0 \u5728\u975edp\u914d\u7f6ecost<\/p>

4\u3001STP\u5207\u6362
\u00a0 \u00a01\uff09\u4e00\u4e2a\u8fde\u63a5pc\u7684\u7aef\u53e3\uff0c\u4ecedown\u5230up\u7b49\u5f85\u591a\u4e45\uff1a30\u79d2
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