Basic Cisco Router Commands
Router Name>
|
User executable mode,
view but can’t make changes
|
Router Name> enable
|
Gets you to Privilege
mode allowing you to make changes 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 router
|
Router Name # shft+ctrl+6
|
Break Key
|
Router Name # write
erase
|
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 router
|
Router 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
ip
int
|
view ip parameters
|
Router Name # sh
ip int brief
|
brief summary of all
interfaces and status
|
Router Name # sh
ip route
|
shows networks
available to interface and routing table
|
Router Name # sh
proc cpu
|
shows CPU utilization
on router
|
Router Name # sh
mem
|
shows memory
utilization
|
Router Name # sh
mem big
|
to see the largest
blocks of memory
|
Router Name # sh
log
|
to check recent
history of router
|
Router Name # sh
version
|
shows summary of
hardware and reason for last reload
|
Router Name # sh
diag
|
shows more detailed
hardware information
|
Router Name # sh
flash
|
shows IOS file
|
Router 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
and general health of router
|
Router Name # sh
env table
|
shows warning levels for shutdown to
take place
|
Router Name # sh
startup-config
|
shows saved config in NVRAM
|
Router Name # sh
controllers(int)
|
shows serial line configurations. Make
sure a space is used for int. ie: s 0
|
Router Name # sh
cdp neighbor
|
shows directly
connected neighbors
|
Router Name # sh
cdp neighbors detail
|
shows detail of
directly connected devices: (router, bridge, switch)
|
Router Name # sh
cdp int
|
shows which
interfaces are running CDP
|
Router Name # sh
arp
|
shows lan devices and
mac address' ( arp table )
|
Router Name # sh
ip
arp
|
shows the arp table
in the router
|
Router Name # sh
protocol
|
shows which protocols
are configured
|
Router Name # sh
ip protocol
|
shows routing
protocol configured and parameters
|
Router Name # sh
ip route isis
|
displays all routes
in the route table that originated in ISIS
|
Router Name # sh isis spf-log
|
displays information
on the duration/cause of recent SPF runs
|
Router Name # sh isis database
|
displays all information known by ISIS
|
Router Name # sh isis database detail …
|
displays contents of
entire LSP (add router info, hr1.lga2.00-00)
|
Router Name # sh isis topology
|
summary of best path
from router to every other router
|
Router Name # sh
ip bgp
|
lists all routes
learned from bgp
|
Router Name # sh
ip bgp <route>
|
shows BGP information
for that particular route, use w/ sh ip rou
|
Router Name #sh ip
bgp community-list
|
add list # to end of
string. Bgp routes that match a given list
|
Router Name # sh
ip bgp filter-list
|
bgp routes that match
a given AS path filter list
|
Router Name # sh
ip bgp neigh(address)
|
shows the details on
a route in the route table
|
Router Name # sh
ip bgp sum
|
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
adjacency detail
|
adjacency table used
by CEF. Verify router/device is discovered
|
Router Name # sh
ip cef
|
to view the CEF cache
or FIB (forwarding information base) table
|
Router Name # sh
ip cef summary
|
gives an overview of
the cef entries
|
Router Name # sh
cef not-cef-switched
|
if CEF is enabled,
this will show packets not being CEF switched
|
Router Name # sh
standby
|
displays the
information on the operation of HSRP
|
Router Name # sh
standby brief
|
displays a summary of
interfaces running HSRP
|
Router Name # sh
standby (interface)
|
displays state of the
port, hello intervals, MAC address, config
|
R# sh mpls
traffic-eng tunnels tunnel #
|
displays tunnels
between hops in a route masked by MPLS
|
Some Basic Switch
Commands
Switch1> ?
|
responds with main
help menu
|
Switch1> hist
|
to view a listing
of previous commands used
|
Switch1> show
?
|
responds with
various show commands
|
Switch1> show
ver
|
information about
IOS and hardware components
|
Switch1> show
module
|
quick view of
status on all modules
|
Switch1> show
port
|
provides general
summary of all ports: errors, collisions, speed, duplex
|
Switch1> show
port (#)
|
specific
information for a individual port
|
Switch1> show
port status
|
provides single
line general summary of all ports
|
Switch1> show
mac (port#)
|
summary information
on what has been sent and received on a given port
|
Switch1> show
test (module#)
|
if a module is in
failed status, show test will show specifics
|
Switch1> show
log
|
shows history of
switch on a per module basis
|
Switch1> show
config
|
shows
configurations on switch
|
Switch1> show
system
|
shows uptime and
levels of utilization
|
Switch1> show
vlan
|
lists the VLAN's
that are resident on the switch
|
Switch1> show
cam
|
lists the LAN
switch transparent bridging table
|
Switch1> sh
cam (mac address)
|
to locate a single
MAC address
|
Switch1> show
cam dynamic
|
lists all
dynamically learned MAC addresses
|
Switch1> show
span
|
lists info on a
port listening/diagnostics feature (switched port analyzer)
|
Switch1> show
spantree (port#)
|
allows you to see
the spantree status of a specific port
|
Switch1> show
trunk
|
provides a summary
of the ports in trunking mode
|
Some Router Enable Commands
To
Enable A Port
·
Router Name# config
t
· Router Name# int (+
interface you are designating, token ring must put in 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# config
t
·
Router Name# router
(protocol type + any extensions needed in instructions)
· Router Name# network
(+ IP address)
To
Disable A Protocol
·
Router Name# config
t
·
Router Name# no
router (+ protocol type)
To
Change Router Name
·
Router Name# config
t
· 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)
· Router Name# write mem (saves
everything to NV Ram)
· Router Name# write t (shows
running configurations, also can use show run)
· 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#
config t
· Router Name# int (+ interface
you plan to configure, ie: e0, s0, ... screen changes, major command)
· Router Name# media-type 10baseT
(or whichever media is being used, sub command)
To
Enable RIP
·
Router Name# config
t
· 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, ... screen changes)
· Config-if# ip address 150.11.1.1
255.255.255.0 (full statement with subnet mask, sub command)
· Config-if# no shut (this
logically activates the interface, required at every interface
configuration)
To
Enable SNMP
·
Router Name# config
t
·
Router Name# snmp
server community public (RO, RW)
To
Enable IPX (Novell)
·
Router Name# config
t
·
Router Name# ipx
routing
· Router Name# int (+ interface
you plan to configure, ie: e0, s0, ... screen changes)
· Router Name# ipx network (ipx
addres
Router Name # sh
ipx servers
|
shows ipx servers
on the network
|
Router Name # sh
ipx route
|
shows ipx networks
seen by the routers
|
Router Name # sh
ipx traffic
|
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 (global command)
·
Router Name# line
vty 0 4
· Router Name# login
· Router Name# password cisco
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