Although Cisco networking 2,500 series have a long life's grand plan, but they are usually used in a lab environment. However, there were a few times and still today 8+-year production run of luck. Drive maker could plead guilty to upgrade many tasks will be more conducive to networking business sees it as $$$. Why upgrade work is fully functional and has been 8+ years of device? All corrupt IOS or no image on 2500 series routers are usually used for this process. It is common to buy router Flash memory erasure, in which case you will need to perform an image restoration process.
Lab Prerequisites:
- You need a corrupted image or not the Cisco IOS image in all 2,500 series routers. If you want to simulate the lab can wipe your device and restart Flash. Please note that you need to clear it before backing up the Cisco IOS image, unless you have another image you want on hand can be loaded onto the device.
- A console connection to the device is required.
- You need to install on your PC to restore the image on the TFTP server.
- By breaking the boot sequence use keys CTRL + pause break boot into ROM models of Cisco routers
- Change the configuration register boot ROM (BOOT) images. The configuration register is to use 0x2141
- By issuing I initialize a router command
- For Ethernet interfaces assigned IP address and configure a default gateway (if required)
- Copy the Cisco IOS image from the TFTP server to the Flash memory.
- Change the configuration register back to its default value, and heavy equipment to ensure that the IOS image on the device to normal startup and recovery.
Lab Instruction:
Step 1. By breaking the boot sequence boot the router to ROM mode the keystrokes CTRL + pause break
Copyright (c) 1986-1996 by cisco Systems
2500 processor with 14336 Kbytes of main memory
Abort at 0x10CFA0A (PC)
>
Step 2. Change the configuration register boot ROM (BOOT) images. Configuration registers are used by 0x2141
>o/r 0x2141
Step 3. Initialize the router by issuing the i command
>i
System Bootstrap, Version 11.0(10c), SOFTWARE
Copyright (c) 1986-1996 by cisco Systems
2500 processor with 14336 Kbytes of main memory
[OUTPUT TRUNCATED]
Press RETURN to get started!
Step 4. assign an IP address to the Ethernet interface, and configure a default gateway (if required).
Press RETURN to get started!
Router(boot)>enable
Router(boot)#config t
Router(boot)(config)#interface e0
Router(boot)(config-if)#ip add 10.1.1.20 255.255.255.0
Router(boot)(config-if)#no shut
Router(boot)(config-if)#exit
****NOTE: The line below is optional if your TFTP server is not on the same network****
Router(boot)(config)#ip default-gateway 10.1.1.254
Router(boot)(config)#end
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