As network technology continues to evolve, the management and maintenance of network devices is becoming increasingly important. As a network administrator or technical support personnel, proficiency in the common commands of Cisco devices is essential. The following are the common commands of Cisco devices organized by NetDu communication engineers for everyone, and friends who need them are recommended to collect them for spare time.
Common commands
Router(config)#hostname Setting the hostname
Router(config)#enable secret 123456 Setting the Privileged Encryption Password
Router(config)#enable password 123456 Setting Privileged Non-Encrypted Passwords
Router#show users View users on this machine
Router# reload Reboot the router
Router# show ip interface Viewing IP configuration information for a port
Router# show hosts View the host table
Router(config)#ip domain-lookup Turn on dynamic domain name resolution
Router#show ip route View the Routing Table
Router#show ip nat translation View NAT Conversions
Router#show startup-config Display saved configuration information
Router#erase nvram Delete Saved Configuration Information
Router(config-if)#no switchport Enable routing ports with configurable ip addresses
Static Route, Default Route
Router(config)# ip route Destination Network Address Segment 255.255.255.0 Next Hop Address Static Route
Router(config)# ip route 0.0.0.0 0.0.0.0 Next Hop Address Default Route
telenet Remote login settings
Router(config)#line vty 0 4
Router(config-line)#password secret code
Router(config-line)#login
Router(config)#access-list acl table number permit ip address Creates acl rules that allow access to ip
Router(config)#line vty 0 4
Router(config-line)#access-class acl table number in Accessible only to ip allowed by this acl rule
Configuring DHCP Services
Router (cofig)# ip dhcp pool Name Defines the address pool
Router(dhcp-config)# network 192.168.1.0 255.255.255.0 Dynamic allocation of IP address segments
Router(dhcp-config)# default-router 192.168.1.254 Set the Gateway Address
Router(dhcp-config)# dns-server 192.168.1.253 Configure DNS addresses for clients
Router(dhcp-config)# lease 3 Set the address rental period, assuming 3 days
Router(dhcp-config)# ip dhcp excluded-address 192.168.1.1 192.168.1.20 Reserve a range of statically assigned IP addresses
The above commands are just the basic operations in Cisco device management, and there are many other advanced commands and features that can be used for more complex network configuration and troubleshooting. NetDirect Communications engineers recommend that administrators study and practice in depth in order to improve their proficiency in network device management. At the same time, maintaining regular updates of device firmware and keys, and strengthening network security awareness are important steps to ensure network stability and security.
