CCNA網絡設備基礎命令記錄

Cisco設備基礎命令

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

可在執行之前執行terminal pager lines 0命令從而一次性獲取所有配置信息（無需翻頁）。

查看序列號

# show inventory

其中SN: xxxxxxxx即爲序列號

配置命令

配置接口

給某個接口配置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#

配置設備ssh

一般情況下可使用telnet協議對網絡設備進行遠程操作，但是爲了提高設備操作的安全性和各種自定義軟件對網絡設備的配置管理，需要開通該設備的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

刪除syslog配額

# no logging host xxx.xxx.xxx.xxx