Purpose | Command |
To See running config file | Show running-config
or sh run |
Displays configuration saved in NVRAM | Show startup-config |
To see IP info of interfaces | Show ip interface brief |
To see statistics of all interfaces | Show interfaces |
To see specific item from running configuration | Show interface f0/0
[Only see the info of the specific interface f0/0 ] sh run | section line [Only see the info of all line sections]
[If you want to see from that line where ‘ip’ word is present to last line]
show run | exclude ip [If you want to see all lines but not to expect ip word related lines]
show run | include ip [If you want to see all lines only included ip word related lines, not others]
|
Displays the system clock | Show clock |
Displays all users connected to the router | Show users |
To Disconnect specific remote users
or
To Disconnect specific remote users |
Clear line 2
[2 means line number]
Clear line vty 0 |
To set idle time of remote session | Exec-timeout 1 |
Displays history of Cisco IOS | Show history |
Displays info about Flash memory | Show flash |
Displays info about loaded Cisco IOS software | Show version |
Displays the ARP table of the router | Show arp |
Displays the IPv4 routing table of the router | Show ip route |
Displays the configured hostnames and their
corresponding IP addresses of the router |
Show host |
Displays status of configured Layer 3 protocols | Show protocols |
Display the CPU utilization for a Cisco device at five minute intervals. | Show process cpu |
Display the total, used and available memory on a Cisco device. | Show memory |
Verify the operational status of fans, temperature and power supplies. In addition list the percentage of power supply utilization and what amount is available | show environment all |
Verify that CDP is enabled, update timer, hold timer and CDP version. | Show cdp |
To show remote users | Show users |
To show ssh information | Show ssh |
To change hostname(itbd) of a router | Hostname itbd |
How to assign a Local Name(remote) to an IP address(10.1.1.1) [we can use the configured hostname for telnet or ping.like→ telnet remote] | Ip host remote 10.1.1.1
|
Configure a MOTD Banner for Router | banner motd #Welcome to IT-Bangladesh# |
To enable DNS lookup | ip name-server 192.168.100.10 |
To turn off the automatic name resolution | no ip domain-lookup |
To get IP info automatically | Ip add dhcp |
To resolve domain name | Ip domain-lookup |
To set DNS Server IP | Ip name-server 8.8.8.8 |
To set enable password(cisco) | Enable password cisco |
To set secret password | Enable secret cisco |
To encrypt all password | Service password-encryption |
To get IP info automatically into VPCS | Ip dhcp |
To set IP address(10.1.1.2/8) & Gateway(10.1.1.1) into VPCS | Ip 10.1.1.2/8 10.1.1.1 |
Delete all routes | Router#clear ip route * |
To see all IP information of VPCS | Show ip |
To remove all the configuration commands you entered and initialize your Cisco device’s configuration | Router#erase startup-config
Router#reload |
To view the logs of the Cisco devices to which you have logged in via Telnet/SSH (Execute this command from remote machine) | # terminal monitor |
To set Message of the day (MOTD) Banner | Banner motd ~ MOTD Banner ~ |
To set Login Banner | Banner login ~ Login Banner ~ |
To set exec Banner | Banner exec ~You are authorized person ~ |
To set timeout session for remote clients | Ip ssh time-out 5 |
To set authentication retries | Ip ssh authentication-retries 3 |