CISCO Router commands

Router commands
Usermode Commands
Sl. No. Command Comments, if any.
1 disconnect Terminates the suspended telnet session and then logout it.
2 enable
3 ping Used to tests the connectivity.It uses ICMP to initiate the connection.
4 ping
5 traceroute Lists all routers along path to destination and finds the routing problems if any.
6 traceroute

Privilegemode Commands
Sl. No. Command Comments, if any.
1 clear arp-cache
2 configure terminal Allows to execute commands that change the router's configuration.
3 copy running-config startup-config It saves the active configuration of the router.
4 copy startup-config running-config
5 debug ip packet
6 disable Returns to the UserEXEC mode from Privilege mode.
7 disconnect
8 erase startup-config Deletes all the configuration files present on a router.
9 logout It exits router from the user or privilege mode.
10 ping Used to tests the connectivity.It uses ICMP to initiate the connection.
11 ping
12 reload
13 resume
14 show access-list Displays all accesslists from all protocols present in a specified router.
15 show banner
16 show cdp Shows the status of CDP such as holdtime value,no.of packets for every 60sec.
17 show cdp interface It tells the CDP configuration on an interface-by-interface basis.
18 show cdp neighbor
19 show cdp traffic
20 show clock
21 show flash Used to view all IOS images and file stored in flash(Default location of IOS images is in flash).
22 show frame-relay lmi Shows the detailed statistics regarding LMI.
23 show frame-relay map
24 show frame-relay pvc Shows all the frame relay PVC's terminated and their statistics at a specified router.
25 show history Shows the previously executed commands.IOS device stores the last ten commands that are executed.
26 show hosts
27 show interfaces To view interfaces,status,and statistics for an interface.If u don't lists a specific interface,all of the interfaces on the router are listed.
28 show interfaces ethernet 0
29 show interfaces loopback 0
30 show interfaces serial 0 displays the lmi type that is being used and also sme LMI statisstics.
31 show ip arp
32 show ip eigrp neighbors Shows the list of eigrp neighbors that a specified router has.
33 show ip eigrp neighbors detail
34 show ip eigrp topology Displays the list of successor and feasible successors,as well as other types of routes.
35 show ip eigrp traffic It shows the information about trafiic statistics for eigrp
36 show ip interface
37 show ip interface brief Verifies the IP configuration.
38 show ip ospf database
39 show ip ospf interface
40 show ip ospf neighbor detail
41 show ip route Verifies the configurationof static and default routes on a router.
42 show protocols Displays the routing protocols that have been configured and running on a specified router.
43 show running-config
44 show sessions shows the telnet sessions that are currently suspended.
45 show startup-config
46 show version Display version information for the hardware and firmware.
47 telnet
48 telnet
49 traceroute
50 traceroute Lists all routers along path to destination and finds the routing problems if any.
51 vlan database Used to access all VLAN and VTP configuration.
52 write erase
53 write memory
54 write terminal

Global configuration mode Commands
Sl. No. Command Comments, if any.
1 access-list {permit | deny} Only standard access list of the format given is supported.
2 access-list {permit | deny}
3 access-list {permit | deny}
4 access-list {permit | deny}
5 banner motd It creates the login banner on a specified router.
6 cdp advertise-v2
7 cdp holdtime
8 cdp run
9 cdp timer
10 config-register Hexadecimal or decimal value that represents the 16-bit configuration register value. It is used at the router start-up. The value range is from 0x0 to 0xFFFF (0 to 65535 in decimal). Normally, the default value is 0x2102
11 dialer-listprotocol ip permit
12 enable password Sets the paasword.The level number is either 1 or 15.
13 enable secret Encrypts the password when it is saved.
14 end
15 hostname
16 interface ethernet 0 Used to access ethernet interface and enter Interface subconfiguration mode.
17 interface fastethernet
18 interface loopback 0 Used to create loopback interface.Port numbers can specify between 0 to 2147483647.
19 interface serial 0
20 interface vlan
21 ip default-gateway Tells the router which router to use when the router needs to reach the destination thats not in its configured subnet.
22 ip default-network
23 ip domain-lookup
24 ip host Complete syntax for this command: ip host name [tcp-port-number] address1 [address2...address8]
25 ip name-server By using this Router access the DNS server to resolve the names to ip addresses.
26 ip route {next-hop-ip-addr | interface-type} The command supported by the simulator are:
ip route and
ip route serial
27 ip route 0.0.0.0 0.0.0.0
28 ip route
29 ip route serial 0 Not supported at this time
30 ip routing
31 ipx routing
32 isdn switch-type
33 line aux
34 line console 0 To enter into console interface.Here 0 specifies the console part.
35 line vty It supports 16 simultaneous telnet connections and each connection is internally tracked by a number:0-15.
36 no banner motd
37 no cdp run It can globally enable or disable the cdp on a router.
38 no ip domain-lookup It disables all the DNS lookups on the router.
39 no ip routing
40 no router eigrp
41 no router ospf
42 no router rip
43 no vlan
44 router eigrp
45 router ospf Process_id is locally significant and is used to differentiate different ospf processes running on a router.
46 router rip Enters into the RIP routing protocol configuration mode.
47 snmp-server enable traps vtp
48 username password


Interface subconfiguration mode Commands
Sl. No. Command Comments, if any.
1 bandwidth Required bandwidth, in kilobits per second.
2 cdp enable
3 clock rate Desired clock rate in bits per second: 1200, 2400, 4800, 9600, 19200, 38400, 56000, 64000 etc.
4 compress stac in
5 description Character string from 1 to 80 characters.
6 dialer-group
7 dialer map ip
8 dialer map ip name
9 dialer string< phone_#>
10 encapsulation Only PPP/HDLC are supported at this time by the simulator.
ex: encapsulation hdlc
11 encapsulation framerelay in
12 frame-relay lmi-type Specifies the LMI type that is used to communicate between a router and carrier's switch.LMI type is specific to the entire interface,not to a VC.
13 frame-relay map It configures the manual resolution of PVC's.
14 frame-relay map broadcast
15 frame-relay map broadcast cisco
16 frame-relay map broadcast ietf
17 frame-relay map cisco
18 frame-relay map ietf
19 ip access-group in
20 ip access-group out
21 ip address
22 isdn spid1 Defines the spid's that are used to authenticate call requests.Used only on local connection between router and isdn switch.
23 isdn spid2
24 keepalive
25 login
26 no bandwidth
27 no cdp enable
28 no clock rate
29 no frame map
30 no frame map broadcast
31 no frame map cisco
32 no frame map ietf
33 no ip address
34 no shutdown
35 shutdown It disable the interfaces.Interfaces are enabled by default.
36 shutdown switchport
37 speed
38 switchport access vlan
39 switchport port-security mac-address sticky
40 switchport port-security maximum
41 switchport port-security violation

Line subconfiguration mode Commands
Sl. No. Command Comments, if any.
1 exec-timeout [seconds] seconds is optional.
2 logging synchronous
3 password

Subinterface Subconfiguration mode Commands
Sl. No. Command Comments, if any.
1 discription It specifies the DLCI number.Uses a dynamic resolution with inverse ARP.
2 frame-relay interface-dlci It specifies the DLCI number.Uses a dynamic resolution with inverse ARP.
3 frame-relay map
4 frame-relay map broadcast
5 frame-relay map broadcast cisco
6 frame-relay map broadcast ietf
7 frame-relay map cisco
8 frame-relay map ietf
9 ip address
10 no ip address
11 no shutdown It specifies the DLCI number.Uses a dynamic resolution with inverse ARP.
12 shutdown It specifies the DLCI number.Uses a dynamic resolution with inverse ARP.

IP Routing Protocol Subconfiguration mode Commands
Sl. No. Command Comments, if any.
1 network Used with routing rip, igrp etc.

User mode Commands

Supported Switch Commands

Sl.No. commands Comments, if any.
1 enable

Privilegemode Commands
Sl.No. commands Comments, if any.
1 clock set hh:mm:ss <1-31> Month <2004-2035>
2 configure terminal Allows to execute commands that change the switch's configuration.
3 copy running-config startup-config It saves the active configuration of the switch.
4 copy startup-config running-config
5 disable Returns to the UserEXEC mode from Privilege mode.
6 erase startup-config
7 logout It exits switch from the user or privilege mode.
8 reload
9 show banner
10 show flash Used to view all IOS images and file stored in flash(Default location of IOS images is in flash).
11 show history
12 show interfaces To view interfaces,status,and statistics for an interface.If u don't lists a specific interface,all of the interfaces on the switch are listed.
13 show ip interface brief Verifies the IP configuration.
14 show running-config It examine the active configuration on a switch.
15 show startup-config
16 show version Display version information for the hardware and firmware


Global Configuration mode Commands
Sl.No. commands Comments, if any.
1 banner motd It creates the login banner on a specified router.
2 cdp advertise-v2
3 cdp holdtime
4 cdp run
5 cdp timer
6 enable password It sets the paasword.The level number is either 1 or 15.
7 enable secret Encrypts the password when it is saved.
8 end
9 hostname
10 ip default-gateway Tells the switch which router or switch have to use when the switch needs to reach the destination thats not in its configured subnet.
11 ip host
12 interface fastethernet <0-0>/<0-24> Depends on the switch type. For module 0, port 1 the command is interface fastethernet 0/1
13 interface vlan You can enter interface config mode.
example: interface vlan 1
(config-if)#ip address 192.168.10.1 255.255.255.0
14 line console 0
15 line vty 0 15
16 mac-address-table static vlan interface fastethernet
17 snmp-server enable traps vtp
18 speed Enter switch port speed 10,100, auto.


Interface Subconfiguration mode Commands
Sl.No. commands Comments, if any.
1 description
2 duplex
3 ip address A switch can have one IP address. The IP address of the switch can be accessed only through ports that belong to the management VLAN.
4 ip name-server
5 login
6 no ip address
7 no shutdown It reenables the interface when the interface is disabled.By default interfaces are enabled.
8 no switchport
9 shutdown Disables a port and shuts-down management vlan. no shutdown command enables a port.


Line Subconfiguration mode Commands
Sl.No. commands Comments, if any.
1 password



Vlan mode Commands
Sl.No. commands Comments, if any.
1 vlan VLAN numbers can range 1-1000,However only 64VLANs can be active ata time.
2 vtp client Specifies the VTP mode of the switch.
3 vtp domain Defines the domain name for a specified switch.For switches to share VTP informtion they must be in the same domain.
4 vtp password
5 vtp pruning
6 vtp server
7 vtp transparent


Workstation Commands
Sl. No. Command Comments, if any.
1 ip address
2 ping
3 ping
4 telnet
5 telnet
6 traceroute
7 traceroute