Using Cisco IOS Software

This chapter describes what you need to know about the Cisco IOS software (the software that runs the access server) before you configure the access server using the command-line interface (CLI). This chapter includes:

Understanding these concepts will save you time later. If you have never used the Cisco IOS software or need a refresher, take a few minutes to read this chapter now.

If you are already familiar with the Cisco IOS software, proceed to the next chapter, "Basic Configuration."

Getting Help

Use the question mark (?) and arrow keys to help you enter commands, where 5400> is the prompt for the top level of the Cisco IOS software for the Cisco AS5400 universal access server.

For a list of available commands, enter a question mark:

5400> ?

To complete a command, enter a few known characters followed by a question mark (with no space):

5400> s?

For a list of command variables, enter the command followed by a space and a question mark:

5400> show ?

To redisplay a command you previously entered, press the up arrow key. You can continue to press the up arrow key for more commands.

Understanding Command Modes

You will use many different command modes to configure the access server. Each command mode restricts you to a subset of commands.

Tips If you are having trouble entering a command, check the prompt, and then enter the question mark (?) for a list of available commands. You might be in the wrong command mode or using the wrong syntax.

In the following example, notice how the prompt changes after each command to indicate a new command mode:

5400> enable
5400> password 
5400# configure terminal
5400(config)# interface fastethernet 0/0
5400(config-if)# ip address 172.16.254.250
5400(config-if)# exit
5400#
%SYS-5-CONFIG_I: Configured from console by console

The last message is normal and does not indicate an error. Press Return to get the 5400> prompt.

Note You can press Ctrl-Z at any time to immediately return to enable mode (5400#), instead of entering exit, which returns you to the previous mode.

How to Find Command Options

This section explains how to display options for a command. To display options for a command, enter a ? at the configuration prompt, or after entering part of a command followed by a space. The configuration parser displays options available with the command. For example, if you were in global configuration mode, typed the command arap, and wanted to see all the keywords and arguments for that command, you would type arap ?

Command
Purpose

Step1

5400> enable

Password: password

5400#

Enter enable mode.

Enter the password.

You have entered enable mode
when the prompt changes to 5400#.

Step2

5400# config terminal
Enter configuration commands, one per line.

End with CNTL/Z. 5400(config)#

Enter global configuration mode and the
prompt changes to 5400(config)#.

Step3

5400(config)# controller t1 1/?

<0-7> Controller port number

5400(config)# controller t1 1/0

Specify the T1 controller that you want
to configure using the controller T1
number global configuration command.

Step4

5400(config-controller)# ?

Controller configuration commands:

Display controller configuration commands.

cablelength channel-group default description ds0 ds0-group exit fdl framing help linecode loopback no pri-group shutdown
Specify cable length for a DS1 link Specify timeslots to channel-group mapping for an interface Set a command to its defaults Controller specific description ds0 commands Replacement of cas-group. Configure group of timeslots to a particular signaling type. Exit from controller configuration mode Specify the FDL standard for a DS1 data link Specify the type of Framing on a DS1 link Description of the interactive help system Specify the line encoding method for a DS1 link Put the entire T1 line into loopback Negate a command or set its defaults Configure the specified timeslots for PRI Shut down a DS1 link (send Blue Alarm)

Step5

5400(config-controller)# ds0-group ? <0-23> Channel number

Display the options for the ds0-group controller configuration command. This command is used to configure the channel-associated signaling on a T1 controller.

Step6

5400(config-controller)# ds0-group 1 ? timeslots List of timeslots in the ds0-group

Display the only command (timeslots) available in ds0-group 1.

Step7

5400(config-controller)# ds0-group 1 timeslots ? <1-24> List of timeslots which comprise the
ds0-group

Display the range for the timeslot option. Specify a timeslot range of values from 1 to 24. You can specify timeslot ranges (for example, 1-24), individual timeslots separated by commas (for example 1, 3, 5), or a combination of the two (for example 1-3, 8, 17-24). The 16th timeslot is not specified in the command line, because it is reserved for transmitting the channel signaling.

Step8

5400(config-controller)# ds0-group 1 timeslots
1-24 ?

Display the two commands (service and type) available for the timeslots.

service
type
Specify the type of service
Specify the type of signaling

Step9

5400(config-controller)# ds0-group 1 timeslots 1-24
type ?

List supported signaling types.

e&m-fgb
e&m-fgd
e&m-immediate-start
fxs-ground-start
fxs-loop-start
sas-ground-start
sas-loop-start
E & M Type II FGB
E & M Type II FGD
E & M Immediate Start
FXS Ground Start
FXS Loop Start
SAS Ground Start
SAS Loop Start

Step10

5400(config-controller)# ds0-group 1 timeslots
1-24 type e&m-fgb ? dtmf DTMF tone signaling
mf MF tone signaling
service Specify the type of service
<cr>

Display the types of channel-associated signaling available for the e&m-fgb type.

Step11

5400(config-controller)# ds0-group 1 timeslots
1-24 type e&m-fgb dtmf ? dnis DNIS addr info provisioned
service Specify the type of service
<cr>

Display the options supported for the DTMF tone signaling option.

	Command	Purpose
Step1	`5400>` enable `Password:` password `5400#`	Enter enable mode. Enter the password. You have entered enable mode when the prompt changes to `5400#`.
Step2	`5400#` config terminal `Enter configuration commands, one per line.` `End with CNTL/Z. 5400(config)#`	Enter global configuration mode and the prompt changes to `5400(config)#`.
Step3	`5400(config)#` controller t1 1/? `<0-7> Controller port number` `5400(config)#` controller t1 1/0	Specify the T1 controller that you want to configure using the controller T1 number global configuration command.
Step4	`5400(config-controller)#` ? `Controller configuration commands:`	Display controller configuration commands.
	`cablelength` `channel-group` `default` `description` `ds0` `ds0-group` `exit` `fdl` `framing` `help` `linecode` `loopback` `no` `pri-group` `shutdown`	`Specify cable length for a DS1 link` `Specify timeslots to channel-group mapping for an interface` `Set a command to its defaults` `Controller specific description` `ds0 commands` `Replacement of cas-group.` `Configure group of timeslots to a particular signaling type.` `Exit from controller configuration mode` `Specify the FDL standard for a DS1 data link` `Specify the type of Framing on a DS1 link` `Description of the interactive help system` `Specify the line encoding method for a DS1 link` `Put the entire T1 line into loopback` `Negate a command or set its defaults` `Configure the specified timeslots for PRI` `Shut down a DS1 link (send Blue Alarm)`
Step5	5400(config-controller)# ds0-group ? <0-23> Channel number	Display the options for the ds0-group controller configuration command. This command is used to configure the channel-associated signaling on a T1 controller.
Step6	5400(config-controller)# ds0-group 1 ? timeslots List of timeslots in the ds0-group	Display the only command (timeslots) available in ds0-group 1.
Step7	5400(config-controller)# ds0-group 1 timeslots ? <1-24> List of timeslots which comprise the ds0-group	Display the range for the timeslot option. Specify a timeslot range of values from 1 to 24. You can specify timeslot ranges (for example, 1-24), individual timeslots separated by commas (for example 1, 3, 5), or a combination of the two (for example 1-3, 8, 17-24). The 16th timeslot is not specified in the command line, because it is reserved for transmitting the channel signaling.
Step8	5400(config-controller)# ds0-group 1 timeslots 1-24 ?	Display the two commands (service and type) available for the timeslots.
	service type	Specify the type of service Specify the type of signaling
Step9	`5400(config-controller)#` ds0-group 1 timeslots 1-24 type ?	List supported signaling types.
	e&m-fgb e&m-fgd e&m-immediate-start fxs-ground-start fxs-loop-start sas-ground-start sas-loop-start	E & M Type II FGB E & M Type II FGD E & M Immediate Start FXS Ground Start FXS Loop Start SAS Ground Start SAS Loop Start
Step10	5400(config-controller)# ds0-group 1 timeslots 1-24 type e&m-fgb ? dtmf DTMF tone signaling mf MF tone signaling service Specify the type of service <cr>	Display the types of channel-associated signaling available for the e&m-fgb type.
Step11	5400(config-controller)# ds0-group 1 timeslots 1-24 type e&m-fgb dtmf ? dnis DNIS addr info provisioned service Specify the type of service <cr>	Display the options supported for the DTMF tone signaling option.

Undoing a Command or Feature

If you want to undo a command you entered or disable a feature, enter the keyword no before most commands; for example, no ip routing.

Saving Configuration Changes

Enter the copy running-config startup-config command to save your configuration changes to nonvolatile random-access memory (NVRAM) so that they will not be lost if there is a system reload or power outage. For example:

5400# copy running-config startup-config
Building configuration...

It might take a minute or two to save the configuration to NVRAM. After the configuration has been saved, the following appears:

[OK]
5400#

Where to Go Next

Now that you have learned some Cisco IOS software basics, you can begin to configure the access server using the CLI.

TimeSaver You can use the question mark (?) and arrow keys to help you enter commands.

TimeSaver Each command mode restricts you to a set of commands. If you are having difficulty entering a command, check the prompt and then enter the question mark (?) for a list of available commands. You might be in the wrong command mode or using the wrong syntax.

TimeSaver If you want to disable a feature, enter the keyword no before the command; for example, no ip routing.

TimeSaver You need to save your configuration changes to NVRAM so that they will not be lost if there is a system reload or power outage.

Proceed to "Basic Configuration," to begin configuring the access server.

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