問個cisco switch 的小問題
In which Spanning-Tree states does a switch port learn MAC addresses? (Select
- stephanieLv 51 0 年前最佳解答
Blocked means that none of the ports is going to transmit or receive any data, but they will listen to the BPDUs. The BPDU carries various pieces of information in the form of timers. These timers control spanning tree's activity and help spanning tree decide which port is blocked, which port is listening, and what the spanning tree topology should be.
無口岸傳送或接受任一資料的封鎖的手段, 僅他們將傾聽BPDUs 。BPDU 傳播各種各樣的資訊以定時器的形式。這些定時器控制生成樹的活動並且幫助生成樹決定哪個口岸被阻攔, 口岸聽□, 並且什麼生成樹拓撲結構應該是。
The second state is the Listening state. The switch listens for frames but doesn't learn or act on them while it is in the listening state. The switch does receive the frames but discards them before any action is taken. MAC addresses are not placed into the CAM table while the port is listening.
第二個狀態是聽的狀態。開關聽為框架但不學會或不行動在他們當它是在聽的狀態。開關接受框架但擯除他們在任一次行動被採取之前。MAC 地址不被安置入CAM 桌當口岸聽□。
The third state is the Learning state. The switch will start to learn the MAC addresses it can see and populate its CAM table with the addresses and the ports on which they were found. In this state, the switch will start to transmit its own BPDUs.
第三狀態是學習的狀態。它可能看和居住於它的CAM 桌以地址和口岸他們被發現的開關將起動學會MAC 地址。在這個狀態, 開關將起動傳送它自己的BPDUs 。
The fourth state is the Forwarding state. The switch has learned MAC addresses and populated its CAM table with this information along with which ports are associated with the MAC addresses. The switch can now forward traffic among the various ports.
第四個狀態是向前狀態。開關學會MAC 地址和居住於它的CAM 桌以一起口岸同MAC 聯繫在一起演講的這資訊與。開關可能現在批轉交通在各種各樣的口岸之中。
In the Disabled state, the switch port is virtually shut down. The port will receive BPDUs but will not forward them to the switch processor. It discards all incoming frames from both the port and other forwarding ports on the switch.
在殘疾狀態, 開關口岸實際上被關閉。口岸將接受BPDUs 但不會批轉他們對開關處理器。它擯除所有接踵而來的框架從口岸和其它向前口岸在開關。
- 1 0 年前
- 1 0 年前
是 bd 才對吧!!