| A | B |
|---|
| configuration file information | A router uses the following information from the configuration file when it starts up: 1) Cisco IOS software version; 2) Router identification; 3) Boot file locations 4) Protocol information; 5) Interface configurations |
| privileged EXEC configure | configure from a virtual (remote) terminal, a modem connection, or a console terminal. |
| configure terminal | configures manually from the console terminal |
| configure memory | loads configuration information from NVRAM |
| copy tftp running-config | loads configuration information from a network TFTP server into RAM |
| show running-config | displays the current configuration in RAM |
| copy running-config startup-config | stores the current configuration from RAM into NVRAM |
| copy running-config tftp | stores the current configuration from RAM on a network TFTP server |
| show startup-config | displays the saved configuration, which is the contents of NVRAM |
| erase startup-config | erases the contents of NVRAM |
| copy running-config tftp command steps | · Step 1 -- Enter the copy running-config tftp command; Step 2 -- Enter the IP address of the host that you want to use to store the configuration file. Step 3 -- Enter the name you want to assign to the configuration file. Step 4 -- Confirm your choices by answering yes each time. |
| commands that manage the contents of NVRAM: | · 1) configure memory -- Loads configuration information from NVRAM; 2) erase startup-config -- Erases the contents of NVRAM. 3) copy running-config startup-config -- Stores the current configuration from RAM (the running configuration) into NVRAM (as the startup or backup configuration). 4) show startup-config -- Displays the saved configuration, which is the contents of NVRAM. |
| specific configuration modes | Interface; Subinterface; Controller; Map-list; Map-class; Line; Router; IPX-router; Route-map |
| If you type exit | the router will back out one level, eventually allowing you to log out |
| Pressing Ctrl-Z | leaves configuration mode completely and returns the router to privileged EXEC mode |
| Global configuration modes | Global configuration commands apply to features that affect the system as a whole. config-router or config-if |
| Configuring routing protocols | Router (config-router)# |
| Interface configuration commands | Because all router interfaces are automatically in the administratively down mode, many features are enabled on a per-interface basis. |
| By default, Cisco routers are | DTE devices, |
| clockrate | Configures the clock rate for the hardware connections on serial interfaces, such as network interface modules |
| bandwidth command | overrides the default bandwidth that is displayed in the show interfaces command and is used by some routing protocols such as IGRP. |
| media-type 10BASE-T | there are two connections on the outside of the box for Ethernet interfaces-an attachment unit interface (AUI) connector and a 10BASE-T connector. The default is AUI, so you must specify media-type 10BASE-T if you want to use the other connection. |
| Password configuration methods | · 1) line console 0 -- establishes a password on the console terminal ; 2) line vty 0 4 -- establishes password protection on incoming Telnet sessions; 3 )enable password -- restricts access to privileged EXEC mode; 4) enable secret password (from the system configuration dialog to set up global parameters -- uses a Cisco proprietary encryption process to alter the password character string 5) You can further protect passwords from being displayed by using the service password-encryption command. This encryption algorithm does not match the Data Encryption Standard (DES). |
| banner motd command | configure a message-of-the-day banner to be displayed on all connected terminals. This banner will be displayed at login and is useful for conveying messages that affect all router users (e.g. impending system shutdowns). |
