cisco3550配置命令学习

熟练掌握cisco 3550的常用配置命令

1. 设置设备的标示名，一般按设备型号+物理位置+管理IP地址

   command:hostname machine_name

2. 配置登录的用户名和密码

   username Cisco password cisco

3. 关闭错误命令查询：no ip domain-lookup
4. SSH登录配置

   在全局模式下:

   line vty 0 15

   password cisco

   login

   transport input {ssh|telnet|none|all}

   access-class 1 in

   no exec-timeout

   enable 模式下:

   enable password cisco

   enable secret cisco1

5. sh lacp sys-id

   sh file system

   sh hardware

   dir or show flash

   crypto key generate rsa

6. AAA认证开启，aaa new-module
7. 邻居发现协议

   cdp run

   cdp timer 10

   cdp holdtime 30

   cdp advertise-v2

int f0/1接口下开启cdp协议

cdp enable

7.line con 0 配置

password cisco

login local

8.spanning-tree

sh spanning-tree active

sh spanning-tree vlan XX active

9.NTP

ntp peer 192.168.1.1 ver 3 key 2 source f0/10 prefer

ntp authenticate

ntp broadcastdelay 3000

ntp trustkey 2

ntp authentication-key 2 md5 cisco

10.VTP

vtp mode {client |server|transparent}

vtp password cisco

vtp domain domain_name

vtp version 2

vtp pruning

sh vtp password

sh vtp status

11.端口安全port-security

int f0/1

swithport port-security ?

ip dhcp snooping(arp 防止攻击)

全局开启 ip dhcp snooping

int  f0/1

ip dhcp snooping {limit rate |trust|vlan}

sh ip dhcp snooping

12.终端显示缓冲的大小

terminal length 100

terminal width 100

sh mac address-table dy int f0/1

sh int counters

errdisable recovery {internal|cause}