Commands - General
There are 3 different modes of operation within the Cisco IOS.- Disabled mode
- Enabled mode
- Configuration mode
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 |
Other Useful Commands
View the Software VersionView 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
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)#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
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