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一、交换机,冲突域,广播域
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交换机的基本功能:a,学习(MAC地址)b,转发(数据帧)c,过滤(基于MAC)
三层交换:
![](https://www.zccie.com/wp-content/uploads/2019/05/image-11.png)
背板带宽:24口交换机 吞吐量:100M 24口为2400M 全双工:2400X2=4800M
冲突域,广播域:
![](https://www.zccie.com/wp-content/uploads/2019/05/image-16.png)
Running-config,Startup-Config
![](https://www.zccie.com/wp-content/uploads/2019/05/image-13.png)
show version
(config)#config-register 0x2142(保存)(config)#config-register 0x2102(重启之后什么都没了)
![](https://www.zccie.com/wp-content/uploads/2019/05/image-12.png)
![](https://www.zccie.com/wp-content/uploads/2019/05/image-15.png)
• Displays the configuration of the system hardware, software version, and boot images
查看交换机接口状态#show int f0/1#show interface status
![](https://www.zccie.com/wp-content/uploads/2019/05/image-14.png)
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二、MAC地址介绍
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show mac add int f0/1–只看通过F0/1接口的mac地址.
![](https://www.zccie.com/wp-content/uploads/2019/05/image-17.png)
![](https://www.zccie.com/wp-content/uploads/2019/05/image-19.png)
![](https://www.zccie.com/wp-content/uploads/2019/05/image-18.png)
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三、交换机工作过程MAC-Table
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![](https://www.zccie.com/wp-content/uploads/2019/05/image-20.png)
![](https://www.zccie.com/wp-content/uploads/2019/05/image-21.png)
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四、交换机端口故障排除
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PING(ICMP):icmp requesticmp replyR#debug ip icmp
定向广播:192.168.1.255,主机位全1,仅仅在192.168.1.0网段广播.R#ping 192.168.1.255192.168.1.0所有的都回,不回的有问题.
![](https://www.zccie.com/wp-content/uploads/2019/05/image-22.png)
TelnetRouter上有virtual-terminal,WIN7用TCP23端口来网管
![](https://www.zccie.com/wp-content/uploads/2019/05/image-23.png)
![](https://www.zccie.com/wp-content/uploads/2019/05/image-24.png)
![](https://www.zccie.com/wp-content/uploads/2019/05/image-25.png)
![](https://www.zccie.com/wp-content/uploads/2019/05/image-27.png)
![](https://www.zccie.com/wp-content/uploads/2019/05/image-28.png)
![](https://www.zccie.com/wp-content/uploads/2019/05/image-26.png)
![](https://www.zccie.com/wp-content/uploads/2019/05/image-31.png)
![](https://www.zccie.com/wp-content/uploads/2019/05/image-30.png)
![](https://www.zccie.com/wp-content/uploads/2019/05/image-32.png)
![](https://www.zccie.com/wp-content/uploads/2019/05/image-29.png)
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五、配置端口双工和速率
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配置端口双工和速率全双工—————半双工 不能正常工作
![](https://www.zccie.com/wp-content/uploads/2019/05/image-33.png)
![](https://www.zccie.com/wp-content/uploads/2019/05/image-34.png)
![](https://www.zccie.com/wp-content/uploads/2019/05/image-35.png)