1. Managing Cisco IOS Software
Module 5
Managing Cisco IOS Software

2. Router startup- A review
Powers up using a ____________ to find and check all hardware
During boot sequence, following loaded into RAM:
___________________ loads initial base instructions
The _______________________
A _______________________
If one is not available, the _________________ _______________ - which prompts the user for a basic router configuration.

3. Bootstrap program Loads initial base instructions
Located in _____________

4. Search process involved in finding ________ image file
Part of the router's boot sequence involves "deciding" from where to obtain the IOS version.
The order is: ________________________ _________________ to see if a particular source for the IOS has been designated in the startup file.
If no special configuration register settings have been used, then the router defaults to…

5. Search process cont… Look in______________________
If loading the IOS from Flash fails, then the router tries looking for a __________________
If this fails, loads a limited version of IOS from _________________________

6. Configuration register values
The order in which the router looks for IOS information depends on the _________________________ in the configuration register

7. Configuration register values cont…
___________________________________ setting with the _______________________ command: ____________________
Ex: Router(config)# config-register 0x100F
Configuration register is 16-bit (4 hex digits)
__________________ of the config register form the _____________________
0000 = = = = F

8. Configuring the IOS locations and file names
If the config register indicates to check in NVRAM (the config file) - default setting
Use the __________________ command to indicate __________________________

9. Configuration File Commands executed line by line
Starts routing processes, supply addresses for interfaces, set media characteristics etc.
Found in one of following places- checked for in this order:
1st NVRAM
2nd TFTP Server
3rd Console (setup)

10. Troubleshooting IOS boot problems
Causes of IOS boot-up problem
Configuration file has _____________________ _____________________________________
__________________________________
Use the last line of the show version command for the configuration register value
____________________________
Hardware failure

11. Recall
There are 2 types of software required for a router or switch to function. What are they?
Where are each by default found?
What is the startup configuration called when it is loaded into RAM?.

12. IOS Naming convention

13. Configuration File backup…

14. Another easier method of backup
Capture the output of the show running-config command
Practice this and see the class demo
Don’t forget to take out the “extra stuff” from the text file version

15. How about copying the IOS to Flash?

16. If the IOS image gets erased or corrupt
________________________________________
ROMmon mode can be identified from the rommon 1 > prompt
In our 2500 series router, it is simply the _____ prompt
If an IOS image is located in flash try to boot from that image (run that image) with the following command:
>____________________:c2600-is-mz.121-5

17. Labs Chapter 5 essential labs:
Managing Configuration files with TFTP – 5.2.3
Password Recovery Procedures – 5.2.6a
(see supplement for this lab)