|
|
This chapter describes what you need to know about the Cisco IOS software (the software that runs the ATM switch router) before you begin to configure it, and includes the following sections:
Understanding these concepts will save you time later on. If you have never used the Cisco IOS software or need a refresher, take a few minutes to read this chapter before you proceed to the next chapter.
If you are already familiar with the Cisco IOS software, skip this chapter and proceed to the next chapter, "Getting Started."
Note This document assumes you have already connected all necessary external devices to the ATM switch router and configured your PC terminal emulation program for 9600 baud, 8 data bits, no parity, and 2 stop bits.
You can use the question mark (?) and arrow keys to help you enter commands.
For a list of available commands, type the question mark:
To complete a command, type a few known characters followed by the question mark (with no space):
For a list of command variables, type the command followed by a space and a question mark:
To redisplay a command you previously entered, press the up arrow key. Continue to press the up arrow key for more commands.
You use many different command modes when you configure the ATM switch router. Each command mode restricts you to a subset of commands.
In the following example, notice how the prompt changes after each command to indicate a new command mode:
 |
Tip  |
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.
Before you can configure a software interface, you need to know how the physical location of the port adapter or interface module in the chassis corresponds to how it is addressed (referred to) in the software. In interface configuration mode, you must enter the card/subcard/port number to configure an interface:
Card, subcard, and port numbering all start at 0 and increment by 1, from top to bottom, and from left to right.
Note In the subsections that follow, the Catalyst 8540 MSR chassis is shown because it is the most robust system. The Catalyst 8540 MSR chassis has 13 slots and supports redundant route processors and switch cards. The Catalyst 8510 MSR and LightStream 1010 chassis have only 5 slots and do not support redundant route processors or switch cards. But the numbering scheme concept is the same, regardless of which chassis you have.
Card numbering starts at 0 and increments by 1 from top to bottom, as shown in Figure 1-1. The card number slots are silkscreened on the left side of each slot.
Subcards are numbered from 0 to 1, left to right. Subcards include half-width port adapters and full-width interface modules (such as an OC-12 interface module).
Two half-width port adapters can occupy one chassis slot. Figure 1-2 shows that the two half-width port adapters in slot 0 are numbered subcards 0 and 1, from left to right. The port adapter in the left slot is numbered subcard 0, and the port adapter in the right slot is numbered subcard 1.
When you apply this numbering scheme to full-width interface modules, the subcard number is 0, because only one full-width interface module fits in a card slot. See Figure 1-2.
So, the subcard portion of the card/subcard/port CLI variable is either 0 or 1 for half-width port adapters, and 0 only for full-width interface modules. For example, in 0/0/1 the second 0 represents subcard 0.
The CPU interface on the processor card is addressed as either ethernet 0 or atm 0, depending on the type of configuration. The other interfaces on the processor card start with 0 and increment by 1. See Figure 1-3.
Port numbering for each subcard starts with 0 and increments by 1, from left to right, as shown in Figure 1-4.
Figure 1-5 shows a Catalyst 8540 MSR chassis populated with several half-width port adapters and full-width interface modules. In this example, 12/0/3 is called out in the last interface module installed in the chassis. The 12/0/3 interface number is derived by:
If you want to undo a command you entered or disable a feature, you can enter the keyword no before most commands; for example, no atm router pnni.
You can display various aspects of the ATM switch router configuration by entering more commands. You can only use more commands in user EXEC and privileged EXEC modes.
To display the current running (unsaved) configuration, enter the more system:running-config command:
To display the saved configuration (stored in nonvolatile random-access memory [NVRAM]), enter the more nvram:startup-config command.
To see a complete list of available more commands, enter the more ? command:
Enter the copy system:running-config nvram:startup-config command to save your configuration changes to NVRAM so that they will not be lost if there is a system reload or power outage:
Depending on the size and complexity of the configuration file, it might take a minute or two to save the configuration to NVRAM. After the configuration has been saved, the following displays:
The ATM switch router contains two types of configuration files: the running configuration and the startup configuration. The running configuration is the current (unsaved) configuration that reflects the most recent configuration changes. The startup configuration is the saved configuration in NVRAM and is used when the system initializes. The two configuration files provide a safeguard against configuration mistakes. If you make a mistake while configuring the ATM switch router, you can revert back to the saved startup configuration by entering the copy nvram:startup-config system:running-config command. Or you can reboot the ATM switch router (without saving the configuration changes) to use the startup configuration in NVRAM.
Now that you have learned some Cisco IOS software basics, you can begin to configure the ATM switch router.
Proceed to the next chapter, "Getting Started," to begin configuring the ATM switch router.
Posted: Mon Mar 3 11:29:47 PST 2003
All contents are Copyright © 1992--2002 Cisco Systems, Inc. All rights reserved.
Important Notices and Privacy Statement.
