IOS restoration method

How to restore ios:
PC settings: (set before ROMMON settings)
IP address 192.168.0.2
Mask 255.255.255.0
Gateway 192.168.0.1 (the IP address of the router)
In the rommon status, enter (case sensitive)
Rommon 1> IP_ADDRESS = 192.168.0.1 (IP address of the router)
Rommon 2> IP_SUBNET_MASK = 255.255.255.0 (vro mask)
Rommon 3> DEFAULT_GATEWAY = 192.168.0.2 (Gateway, which is the IP address of the PC)
Rommon 4> TFTP_SERVER = 192.168.0.2 (pc ip address)
Rommon 5> TFTP_FILE = c2600-i-mz.120-7.T.bin (name of the uploaded file)
Rommon 6> sync (SAVE)
Rommon 7> set (view)
Rommon 8> tftpdnld (Transfer File) prompts to select y

After the upgrade, rommon> reset
Then enter the normal mode
Remember: Some XM devices, it is best to # copy tftp flash again in Normal Mode: Upgrade once, it will be normal.
 
There are a lot of brothers who have problems upgrading ios. Here is a note for IOS upgrade.
1. Pre-Upgrade: confirm the current system resources, including mem and FLASH.
2. Check the IOS version number and feature set of the current running version. Note that the current version does not contain T, the T series in cisco IOS generally have many new features and support for new hardware. In general, the new features supported by 11.3T will not be merged into the main release version until 12.0. It is important to note that versions of 12.0T can only be merged to a specific version of 12.1, and so on.
3. for IOS to be upgraded (mainly mem/flash), check that the current resource meets the requirements of the new version. Confirm that the feature set meets the requirements.
4. Back up the original IOS and configuration files. Make sure there are no errors during the backup process.
5. Upgrade IOS.
6. confirm that the new IOS is written to FLASH.
7. Use boot system (IOS) or set boot system (cat OS) to modify the Startup File name. The names of startup files vary slightly from platform to platform. (if there is a previous configuration, no or clear is required)
8. Save the configuration and confirm that the startup parameters are correctly configured.
9. reload.
This article is from the "Believe in yourself" blog