| A | B |
|---|
| Boot System Commands in NVRAM | Where the router looks to determine where the Cisco IOS software will boot. |
| Designated Fallback Sources | You can specify these to tell the router where to boot from. |
| Flash | Where router will first boot the IOS (by default) if there are no boot commands in NVRAM. |
| TFTP Server | Where the router boots (by default) if the Flash is empty. |
| router(config)#config-register | Command to change the default configuration setting. |
| 0x...0 | Configuration register tells to boot from ROM monitor |
| 0x...1 | Configuration register tells to boot from ROM |
| 0x...2 | Configuration register tells to examine NVRAM for boot system commands. |
| router#show version | Command used to check boot field/configuration register setting and displays information about the Cisco IOS software image file.. |
| router(config)#boot system flash [filename] | Command used to tell router to boot from FLASH. |
| router(config)#boot system tftp [filename] [ip address of tftp server] | Command used to tell router to boot from TFTP network server. |
| router(config)#boot system rom | Command used to tell router to boot from ROM. |
| router#copy running-config startup-config | Command to save the configuration file to NVRAM. |
| Perform before copying software between TFTP & flash | Ping TFTP, Verify sufficient room in Flash memory, Specify a filename for IOS image. |
| router#show flash | Command used to check the amount fo system memory available and views the name of the system image file. |
| 3 parts of IOS naming convention | Platform on which image runs, Special capabilities, Specifics where image runs & is compressed or not. |
| cpa25 | Of example cpa25-cg-1, identifies the platform on which image runs. |
| cg | Of example cpa25-cg-1, identifies the special capabilities. |
| 1 | Of example cpa25-cg-1, identifies where the image runs & if it is compressed. |
| router#copy flash tftp | Command to copy IOS image stored in flash to a network server. |
| router#copy tftp flash | Command to copy IOS image from a network server to flash. |
| router(config)#int e0 ip address subnet mask | Command used to configure an Ethernet port. |
| router(config)#router rip | Command used to configure a routing protocol. |
| RXBOOT | Mode to recover passwords |
| Ctrl+Break | Key command to break into router during the cold boot. |
| 0x2142 | Configuration register entered on a Cisco 2500 series router during password recovery procedure. |
