cisco3550配置命令学习

3254rf

熟练掌握cisco 3550的常用配置命令

• 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
  
• 配置登录的用户名和密码
  username Cisco password cisco
  
• 关闭错误命令查询：no ip domain-lookup
  
  
• 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
  
• sh lacp sys-id
  sh file system
  sh hardware
  dir or show flash
  crypto key generate rsa
  
• AAA认证开启，aaa new-module
  
• 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}