Basic Cisco Router Commands

8/3/2019 Basic Cisco Router Commands

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Basic Cisco Router Commands

( Not All Commands May Be Available Without Enable Access Or RouterVersion )

Router Name> User executable mode, view but cant make changes

Router Name>

enable

Gets you to Privilege mode allowing you to makechanges to the router

Router Name#

Privilege mode, changes can now be made to router

Router Name #disable

To get back to user mode

Router Name # exit To exit routerRouter Name #shft+ctrl+6

Break Key

Router Name # writeerase

To clear all previous configurations

Router Name #reload

Reboot the router

Router Name #setup

Setup command brings up the configuration dialog box.

Some Router Show Commands

Router Name # sh ? shows parameters supported by the routerRouter Name # sh int shows status of all interfaces

Router Name # sh int

s0

shows status of interface you selected, ie: s0,

s1, e0, e1, ...Router Name # sh ipint

view ip parameters

Router Name # sh ip intbrief

brief summary of all interfaces and status

Router Name # sh iproute

shows networks available to interface androuting table

Router Name # sh proc cpu shows CPU utilization on routerRouter Name # sh mem shows memory utilizationRouter Name # sh mem big to see the largest blocks of memoryRouter Name # sh log to check recent history of routerRouter Name # sh version shows summary of hardware and reason for

last reloadRouter Name # sh diag shows more detailed hardware informationRouter Name # sh flash shows IOS fileRouter Name # sh run shows running configurations on router

( version 10.3 and above )Router Name # wr t shows running configurations on router

(version 10.3 below/above)Router Name # sh env all shows current router temps, power supply


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and general health of routerRouter Name # sh env table shows warning levels for shutdown to take

placeRouter Name # sh startup-config

shows saved config in NVRAM

Router Name # shcontrollers(int) shows serial line configurations. Make surea space is used for int. ie: s 0Router Name # sh cdpneighbor

shows directly connected neighbors

Router Name # sh cdpneighbors detail

shows detail of directly connected devices:(router, bridge, switch)

Router Name # sh cdp int shows which interfaces are running CDPRouter Name # sharp

shows lan devices and mac address' ( arp table)

Router Name # sh iparp

shows the arp table in the router

Router Name # sh protocol shows which protocols are configured

Router Name # sh ipprotocol

shows routing protocol configured andparameters

Router Name # sh ip routeisis

displays all routes in the route table thatoriginated in ISIS

Router Name # sh isis spf-log

displays information on the duration/cause ofrecent SPF runs

Router Name # sh isisdatabase

displays all information known by ISIS

Router Name # sh isisdatabase detail

displays contents of entire LSP (add router info,hr1.lga2.00-00)

Router Name # sh isistopology

summary of best path from router to everyother router

Router Name # sh ip bgp lists all routes learned from bgpRouter Name # sh ip bgp

shows BGP information for that particularroute, use w/ sh ip rou

Router Name #sh ip bgpcommunity-list

add list # to end of string. Bgp routes thatmatch a given list

Router Name # sh ip bgpfilter-list

bgp routes that match a given AS path filter list

Router Name # sh ip bgpneigh(address)

shows the details on a route in the route table

Router Name # sh ip bgpsum

used to view the status of a BGP session

Router Name # sh route-map (name) show the details of a specific route-map

Router Name # sh adjacencydetail

adjacency table used by CEF. Verifyrouter/device is discovered

Router Name # sh ip cef to view the CEF cache or FIB (forwardinginformation base) table

Router Name # sh ip cefsummary

gives an overview of the cef entries

Router Name # sh cef not- if CEF is enabled, this will show packets not


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cef-switched being CEF switchedRouter Name # sh standby displays the information on the operation of

HSRPRouter Name # sh standbybrief

displays a summary of interfaces running HSRP

Router Name # sh standby(interface)

displays state of the port, hello intervals, MACaddress, config

R# sh mpls traffic-engtunnels tunnel #

displays tunnels between hops in a routemasked by MPLS

Some Basic Switch Commands

( Not All Commands May Be Available Without Enable Access )

Switch1> ? responds with main help menuSwitch1> hist to view a listing of previous commands usedSwitch1> show ? responds with various show commandsSwitch1> show ver information about IOS and hardware componentsSwitch1> show module quick view of status on all modulesSwitch1> show port provides general summary of all ports: errors,

collisions, speed, duplexSwitch1> show port(#)

specific information for a individual port

Switch1> show portstatus

provides single line general summary of all ports

Switch1> show mac(port#)

summary information on what has been sent andreceived on a given port

Switch1> show test

(module#)

if a module is in failed status, show test will show

specificsSwitch1> show log shows history of switch on a per module basisSwitch1> show config shows configurations on switchSwitch1> show system shows uptime and levels of utilizationSwitch1> show vlan lists the VLAN's that are resident on the switchSwitch1> show cam lists the LAN switch transparent bridging tableSwitch1> sh cam (macaddress)

to locate a single MAC address

Switch1> show camdynamic

lists all dynamically learned MAC addresses

Switch1> show span lists info on a port listening/diagnostics feature(switched port analyzer)

Switch1> showspantree (port#)

allows you to see the spantree status of a specificport

Switch1> show trunk provides a summary of the ports in trunking mode

Some Router Enable Commands

To Enable A Port


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Router Name# config t

Router Name# int (+ interface you are designating, token ring must putin ring speed 16 or 4)

Router Name# ip address _._._._ (mask)

Router Name# no shut

To Disable A Port

Router Name# int (interface or port)

Router Name# shut

To Enable A Protocol

Different protocols will have different instructions below is a generic example:


Router Name# router (protocol type + any extensions needed ininstructions)

Router Name# network (+ IP address)

To Disable A Protocol


Router Name# no router (+ protocol type)

To Change Router Name


Router Name# hostname Jim (global command)

Router Name# ctrl z

From Config T settings:

Router Name# ctrl z (to save settings and execute the command)

Router Name# ctrl c (starts over, abort)


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Router Name# write mem (saves everything to NV Ram)

Router Name# write t (shows running configurations, also can use showrun)

Router Name# telnet (to telnet into another router)

Router Name# ip host name (name & address - To Build Host Table -Global Command)

Router Name# no host (to remove a host name)

* On a 4000 series router you must specify what type of media is being used:


Router Name# int (+ interface you plan to configure, ie: e0, s0, ... screenchanges, major command)

Router Name# media-type 10baseT (or whichever media is being used,sub command)

To Enable RIP


Router Name# router rip

Router Name# network(+ network address, ie: 150.111.0.0 )

Router Name# int (+ interface you plan to configure, ie: e0, s0, ... screenchanges)

Config-if# ip address 150.11.1.1 255.255.255.0 (full statement withsubnet mask, sub command)

Config-if# no shut (this logically activates the interface, required atevery interface configuration)

To Enable SNMP


Router Name# snmp server community public (RO, RW)

To Enable IPX (Novell)


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Router Name# ipx routing

Router Name# int (+ interface you plan to configure, ie: e0, s0, ... screen

changes)

Router Name# ipx network(ipx address)

Router Name # sh ipxservers

shows ipx servers on the network

Router Name # sh ipxroute

shows ipx networks seen by the routers

Router Name # sh ipxtraffic

shows ipx related protocols

Router Name # sh ipx int view ipx address on an

interface

To Enable VTY

Router Name# config t enable password cisco enter (globalcommand)

Router Name# line vty 0 4

Router Name# login

Router Name# password cisco

Basic Cisco Router Commands

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