Cisco Router Configuration Commands

Requirement	Cisco Command
Set a console password to cisco	Router(config)#line con 0 Router(config-line)#login Router(config-line)#password cisco
Set a telnet password	Router(config)#line vty 0 4 Router(config-line)#login Router(config-line)#password cisco
Stop console timing out	Router(config)#line con 0 Router(config-line)#exec-timeout 0 0
Set the enable password to cisco	Router(config)#enable password cisco
Set the enable secret password to peter. This password overrides the enable password and is encypted within the config file	Router(config)#enable secret peter
Enable an interface	Router(config-if)#no shutdown
To disable an interface	Router(config-if)#shutdown
Set the clock rate for a router with a DCE cable to 64K	Router(config-if)clock rate 64000
Set a logical bandwidth assignment of 64K to the serial interface	Router(config-if)bandwidth 64 Note that the zeroes are not missing
To add an IP address to a interface	Router(config-if)#ip addr 10.1.1.1 255.255.255.0
To enable RIP on all 172.16.x.y interfaces	Router(config)#router rip Router(config-router)#network 172.16.0.0
Disable RIP	Router(config)#no router rip
To enable IRGP with a AS of 200, to all interfaces	Router(config)#router igrp 200 Router(config-router)#network 172.16.0.0
Disable IGRP	Router(config)#no router igrp 200
Static route the remote network is 172.16.1.0, with a mask of 255.255.255.0, the next hop is 172.16.2.1, at a cost of 5 hops	Router(config)#ip route 172.16.1.0 255.255.255.0 172.16.2.1 5
Disable CDP for the whole router	Router(config)#no cdp run
Enable CDP for he whole router	Router(config)#cdp run
Disable CDP on an interface	Router(config-if)#no cdp enable

Cisco Router Show Commands

Requirement	Cisco Command
View version information	show version
View current configuration (DRAM)	show running-config
View startup configuration (NVRAM)	show startup-config
Show IOS file and flash space	show flash
Shows all logs that the router has in its memory	show log
View the interface status of interface e0	show interface e0
Overview all interfaces on the router	show ip interfaces brief
View type of serial cable on s0	show controllers 0 (note the space between the 's' and the '0')
Display a summary of connected cdp devices	show cdp neighbor
Display detailed information on all devices	show cdp entry *
Display current routing protocols	show ip protocols
Display IP routing table	show ip route
Display access lists, this includes the number of displayed matches	show access-lists
Check the router can see the ISDN switch	show isdn status
Check a Frame Relay PVC connections	show frame-relay pvc
show lmi traffic stats	show frame-relay lmi
Display the frame inverse ARP table	show frame-relay map

Cisco Router Basic Operations

Requirement	Cisco Command
Enable	Enter privileged mode
Return to user mode from privileged	disable
Exit Router	Logout or exit or quit
Recall last command	up arrow or
Recall next command	down arrow or
Suspend or abort	and  and 6 then x
Refresh screen output
Compleat Command	TAB

Cisco Router Copy Commands

Requirement	Cisco Command
Save the current configuration from DRAM to NVRAM	copy running-config startup-config
Merge NVRAM configuration to DRAM	copy startup-config running-config
Copy DRAM configuration to a TFTP server	copy runing-config tftp
Merge TFTP configuration with current router configuration held in DRAM	copy tftp runing-config
Backup the IOS onto a TFTP server	copy flash tftp
Upgrade the router IOS from a TFTP server	copy tftp flash

Cisco Router Debug Commands

Requirement	Cisco Command
Enable debug for RIP	debug ip rip
Enable summary IGRP debug information	debug ip igrp events
Enable detailed IGRP debug information	debug ip igrp transactions
Debug IPX RIP	debug ipx routing activity
Debug IPX SAP	debug IPX SAP
Enable debug for CHAP or PAP	debug ppp authentication
Switch all debugging off	no debug all undebug all

CISCO IOS Router Commands

Routing with Cisco 2500 and 1000 Series for LAN-ISDN Service Commands - General There are 3 different modes of operation within the Cisco IOS. Disabled mode Enabled mode Configuration mode In the Disabled mode you can use a limited number of commands. This is used  primarily to monitor the router. The Enabled mode is used to show configuration  information, enter the configuration mode, and make changes to the configuration. The Configuration mode is used to enter and update the runtime configuration. To get a list of the commands for the cisco type '?' at the prompt. To get further  information about any command, type the command followed by a '?'. clear Reset functions clock Manage the system clock configure Enter configuration mode debug Debugging functions (see also 'undebug') disable Turn off privileged commands enable Turn on privileged commands erase Erase flash or configuration memory exit Exit from the EXEC help Description of the interactive help system login Log in as a particular user logout Exit from the EXEC no Disable debugging functions ping Send echo messages reload Halt and perform a cold restart setup Run the SETUP command facility show Show running system information telnet Open a telnet connection terminal Set terminal line parameters test Test subsystems, memory, and interfaces traceroute Trace route to destination tunnel Open a tunnel connection undebug Disable debugging functions (see also 'debug') verify Verify checksum of a Flash file write Write running configuration to memory, network, or terminal show access-lists List access lists arp ARP table buffers Buffer pool statistics configuration Contents of Non-Volatile memory controllers Interface controller status debugging State of each debugging option dialer Dialer parameters and statistics extended Extended Interface Information flash System Flash information flh-log Flash Load Helper log buffer history Display the session command history hosts IP domain-name, lookup style, name servers, and host table interfaces Interface status and configuration ip IP information isdn ISDN information line TTY line information logging Show the contents of logging buffers memory Memory statistics privilege Show current privilege level processes Active process statistics protocols Active network routing protocols queue Show queue contents queueing Show queueing configuration reload Scheduled reload information route-map route-map information running-config Current operating configuration sessions Information about Telnet connections smf Software MAC filter stacks Process stack utilization startup-config Contents of startup configuration subsys Show subsystem information tcp Status of TCP connections terminal Display terminal configuration parameters users Display information about terminal lines version System hardware and software status View the Software Version Cisco>en Cisco#wr term <--- Shows the running configuration Building configuration... Current configuration: ! version 11.2 no service udp-small-servers no service tcp-small-servers ! hostname Cisco ! interface Ethernet0 ip address 192.168.1.1 255.255.255.0 ! interface Serial0 ip address 192.168.6.1 255.255.255.0 encapsulation frame-relay frame-relay lmi-type ansi ! interface Serial1 ip address 192.168.4.2 255.255.255.0 encapsulation frame-relay bandwidth 1536 keepalive 5 frame-relay map ip 192.168.4.1 101 IETF ! router rip version 2 network 192.168.4.0 network 192.168.6.0 neighbor 192.168.6.2 neighbor 192.168.4.1 ! ip classless ip route 0.0.0.0 0.0.0.0 192.168.6.2 ip route 0.0.0.0 0.0.0.0 192.168.4.1 ! line con 0 line aux 0 line vty 0 4 login ! end View the Ethernet IP Router#wr term This will show the running configuration. Within the configuration, you will see an interface ethernet 0 section: interface Ethernet0 ip address 38.150.93.1 255.255.255.0 no ip directed-broadcast View the Serial IP Router#wr term Within the configuration, you will see an interface serial 0 section: interface Serial0 ip address 38.21.10.100 255.255.255.0 ip broadcast-address 38.21.10.255 ip access-group 106 in encapsulation frame-relay bandwidth 56 no fair-queue frame-relay map ip 38.21.10.1 500 IETF View the Default Route Router#wr term Within the configuration, you will see an ip route section. In the ip route section, look for a route: ip route 0.0.0.0 0.0.0.0 38.167.29.1 The last ip address is the POP ip. View the Filters Router#wr term Under interface serial 0, look for: ip access-group 104 in ip access-group 105 out This means that access-group 104 is the inbound filter set and access-group 105 is the outbound filter set. Then, continue to look in the configuration for the access-list statements: (Example access-list statements) access-list 104 deny ip 38.166.101.0 0.0.0.255 any access-list 104 permit tcp any any established access-list 104 permit tcp any eq ftp-data any gt 1023 access-list 104 permit udp any eq domain any gt 1023 access-list 104 permit udp any eq domain any eq domain access-list 104 permit icmp any any access-list 104 permit udp any eq snmp any gt 1023 access-list 105 deny ip any 38.166.101.0 0.0.0.255 access-list 105 permit tcp any any established access-list 105 permit tcp any any eq ftp access-list 105 deny udp any eq netbios-ns any access-list 105 deny udp any eq netbios-dgm any access-list 105 permit ip any any View the Bandwidth Router#wr term Within the config, you will see an interface serial 0 section: interface Serial0 ip address 38.21.10.100 255.255.255.0 ip broadcast-address 38.21.10.255 ip access-group 106 in encapsulation frame-relay bandwidth 56 no fair-queue frame-relay map ip 38.21.10.1 500 IETF Add a Static Route Cisco#config t Enter configuration commands, one per line. End with CNTL/Z. Cisco(config)# Cisco#config t Enter configuration commands, one per line. End with CNTL/Z. Cisco(config)# ip route DEST.DEST.DEST.DEST MASK.MASK.MASK.MASK GATE.GATE.GATE.GATE where: DEST.DEST.DEST.DEST = The destination network the static route is for MASK.MASK.MASK.MASK = The subnet mask of the destination network GATE.GATE.GATE.GATE = The gateway of the static route Example route statement: ip route 38.222.75.0 255.255.255.0 38.20.5.1 Cisco(config)#^Z (hit z) Write the entry to memory: Cisco#wr mem Building configuration... [OK] Change the Dial Number Type en to put the router in enable mode: test.com>en The password should be the same as the one used to telnet in. Password: To view the router's configuration, type: test.com#show config There will be a line in the configuration that says: dialer map IP 38.1.1.1 speed 64 name LD3330 2707000 The 2707000 is the dial number. NOTE: Record what interface the dialer map IP line is under because you will need to use that interface when changing the number. Type config t to configure from terminal. test.com#config t Enter configuration commands, one per line. End with CNTL/Z. Enter the interface that the dialer map IP line is under: test.com(config)#interface BRI0 Add in the new dialer map IP line with the new phone number: test.com(config)#dialer map IP 38.1.1.1 speed 64 name LD3330 [new number] Now, remove the old dialer map IP line. To remove a line, type no and then the line. For example, to remove the old dialer map IP, type: test.com(config)#no dialer map IP 38.1.1.1 speed 64 name LD3330 2707020 Now leave config mode: test.com(config)# [control] z Save changes: test.com# write mem Building configuration... [OK] Verify the new number is in the config: test.com#show config The new number should be in the dialer map IP line. Turn Filters On and Off To turn the filters off: Router#configure terminal Router(config)#interface Serial0 Router(config-if)#no ip access-group 104 in Router(config-if)#no ip access-group 105 out Router(config-if)# Hit CTRL-Z Router#wr mem Building configuration... [OK] Router# To turn the filters on: Router#configure terminal Router(config)#interface Serial0 Router(config-if)#ip access-group 104 in Router(config-if)#ip access-group 105 out Router(config-if)# Hit CTRL-Z Router#wr mem Building configuration... [OK] Router# Ping from the Router Cisco#ping Example: Cisco#ping 38.8.14.2

Source: http://www.tomax7.com/mcse/cisco_commands.htm

New Year 2011

Our New Year Trip