A16B-1212-0182

交換機處理幀有不同的操作模式： 存儲轉發：交換機在轉發之前必須接收整個幀，并進行檢錯，如無錯誤 再將這一幀發向目的地址。幀通過交換機的轉發時延隨幀長度的不同而 變化。 直通式：交換機只要檢查到幀頭中所包含的目的地址就立即轉發該幀， 而無需等待幀全部的被接收，也不進行錯誤校驗。由于以太網幀頭的長 度總是固定的，因此幀通過交換機的轉發時延也保持不變。

A16B-1212-0182

聯系人：郭先生
聯系電話：18971415643《優先》
座機：027-83238871
傳真：207-61537051
QQ：810334512《優先》

A16B-1212-0182

注意：生成樹協議在交換機上一般是默認開啟的，不經人工干預即可正 常工作。但這種自動生成的方案可能導致數據傳輸的路徑并非最優化。 因此，可以通過人工設置網橋優先級的方法影響生成樹的生成結果。 生成樹的狀態： 運行生成樹協議的交換機上的端口，總是處于下面四個狀態中的一個。 在正常操作 期間，端口處于轉發或阻塞狀態。當設備識別網絡拓撲結 構變化時，交換機自動進行狀態轉換，在這期間端口暫時處于監聽和學 習狀態。

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