Commands - General
There are 3 different
modes of operation within the Cisco IOS.
1.
Disabled mode
2.
Enabled mode
3.
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 '?'.
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clear
|
Reset functions
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clock
|
Manage the system clock
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configure
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Enter configuration
mode
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debug
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Debugging functions
(see also 'undebug')
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disable
|
Turn off privileged
commands
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enable
|
Turn on privileged
commands
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erase
|
Erase flash or
configuration memory
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exit
|
Exit from the EXEC
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help
|
Description of the
interactive help system
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login
|
Log in as a particular
user
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logout
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Exit from the EXEC
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no
|
Disable debugging
functions
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ping
|
Send echo messages
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reload
|
Halt and perform a cold
restart
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setup
|
Run the SETUP command
facility
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show
|
Show running system
information
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telnet
|
Open a telnet
connection
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terminal
|
Set terminal line
parameters
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test
|
Test subsystems,
memory, and interfaces
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traceroute
|
Trace route to
destination
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tunnel
|
Open a tunnel
connection
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undebug
|
Disable debugging
functions (see also 'debug')
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verify
|
Verify checksum of a
Flash file
|
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write
|
Write running
configuration to memory, network, or terminal
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|
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show
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|
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access-lists
|
List access lists
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arp
|
ARP table
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buffers
|
Buffer pool statistics
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configuration
|
Contents of
Non-Volatile memory
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controllers
|
Interface controller
status
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debugging
|
State of each debugging
option
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dialer
|
Dialer parameters and
statistics
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extended
|
Extended Interface
Information
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flash
|
System Flash
information
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flh-log
|
Flash Load Helper log
buffer
|
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history
|
Display the session
command history
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hosts
|
IP domain-name, lookup
style, name servers, and host table
|
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interfaces
|
Interface status and
configuration
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ip
|
IP information
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isdn
|
ISDN information
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line
|
TTY line information
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logging
|
Show the contents of
logging buffers
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memory
|
Memory statistics
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privilege
|
Show current privilege
level
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processes
|
Active process
statistics
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protocols
|
Active network routing
protocols
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queue
|
Show queue contents
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queueing
|
Show queueing
configuration
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reload
|
Scheduled reload
information
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route-map
|
route-map information
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running-config
|
Current operating
configuration
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sessions
|
Information about
Telnet connections
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smf
|
Software MAC filter
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stacks
|
Process stack
utilization
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startup-config
|
Contents of startup
configuration
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subsys
|
Show subsystem
information
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tcp
|
Status of TCP
connections
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terminal
|
Display terminal
configuration parameters
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users
|
Display information
about terminal lines
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version
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System hardware and
software status
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Other Useful Commands
View the Software Version
View the Ethernet IP
View the Serial IP
View the Default Route
View the Filters
View the Bandwidth
Add a Static Route
Change the Dial Number
Turn Filters On and Off
Ping from the Router
Traceroute from the Router
View the Ethernet IP
View the Serial IP
View the Default Route
View the Filters
View the Bandwidth
Add a Static Route
Change the Dial Number
Turn Filters On and Off
Ping from the Router
Traceroute from the Router
Cisco>en
Cisco#wr term
<--- configuration="" nbsp="" o:p="" running="" shows="" the="">
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
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
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.
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
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
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]
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