CCNA网络设备基础命令记录

Cisco设备基础命令

查看命令

查看接口ip

# show ip interface brief

查看所有路由

# show ip route

查看配置信息

# show running-config

可在执行之前执行terminal pager lines 0命令从而一次性获取所有配置信息（无需翻页）。

查看序列号

# show inventory

其中SN: xxxxxxxx即为序列号

配置命令

配置接口

给某个接口配置ip

R1> enable 
R1# configure terminal 
R1(config)# interface fastEthernet 0/0
R1(config-if)# ip address 192.168.211.100 255.255.255.0
R1(config-if)# no shutdown 
R1(config-if)# end
R1# ping 192.168.211.30

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.211.30, timeout is 2 seconds:
.!!!!
Success rate is 80 percent (4/5), round-trip min/avg/max = 8/17/28 ms
R1# write 
Warning: Attempting to overwrite an NVRAM configuration previously written
by a different version of the system image.
Overwrite the previous NVRAM configuration?[confirm]
Building configuration...
[OK]
R1# 

配置路由

R2#configure terminal 
Enter configuration commands, one per line.  End with CNTL/Z.
R2(config)#ip route 192.168.211.0 255.255.255.0 10.0.1.1 
R2(config)#end
R2#write 
Building configuration...
[OK]
R2#

配置设备ssh

一般情况下可使用telnet协议对网络设备进行远程操作，但是为了提高设备操作的安全性和各种自定义软件对网络设备的配置管理，需要开通该设备的ssh。

SSH-R2#configure terminal 
Enter configuration commands, one per line.  End with CNTL/Z.
SSH-R2(config)#ip domain-name xxx.com
SSH-R2(config)#crypto key generate rsa
How many bits in the modulus [512]: 1024
% Generating 1024 bit RSA keys, keys will be non-exportable...[OK]


SSH-R2(config)#line vty 0 5
SSH-R2(config-line)#login local 
SSH-R2(config-line)#transport input ssh
SSH-R2(config-line)#access-class 1 in
SSH-R2(config-line)#exit 
SSH-R2(config)#username cisco secret cisco
SSH-R2(config)#aaa new-model 
SSH-R2(config)#enable secret cisco
SSH-R2(config)#ip ssh time-out 120
SSH-R2(config)#ip ssh version 2
SSH-R2(config)#end
SSH-R2#wr
Building configuration...
[OK]

syslog配置

查看syslog配置

> show running-config | include logging

配置syslog

# logging host xxx.xxx.xxx.xxx

删除syslog配额

# no logging host xxx.xxx.xxx.xxx