The method of router system recovery

In fact, like computers, routers are operating system, but generally we do not use it, since there is an operating system, then the computer will also have the same system crash situation, the following to Cisco router as an example of how to carry out system recovery.

First, we introduced here is Cisco router using erase Flash command, with the console port connection, the computer needs a TFTP server software, the way to restore iOS

1, the computer settings:

IP address 192.168.0.2;

Mask 255.255.255.0;

Gateway 192.168.0.1, which is the IP address of the router.

2, in the Rommon state of input:

Rommon 1 >ip_address=192.168.0.1 router's IP address;

Rommon 2 >ip_subnet_mask=255.255.255.0 router's mask;

Rommon 3 >default_gateway=192.168.0.2 Gateway, is the IP address of the computer;

Rommon 4 >tftp_server=192.168.0.2 is the IP address of the computer;

Rommon 5 >tftp_file=c2600-i-mz.120-7.t.bin The name of the uploaded file;

Rommon 6 >sync Preservation;

Rommon 7 >set view;

Rommon 8 >tftpdnld Transfer file, appears prompted to select Y.

Second, upgrade the iOS notice

1, before the upgrade work: Confirm the current system resources, including Mem,flash.

2, confirm the current version of iOS version number, feature set, you need to pay special attention to with T,cisco iOS in the T series are generally with a lot of new features, new hardware support. Typically, the new features of 11.3T support will not be merged into the main release until 12.0. A version of 12.0T to 12.1 will be merged, and so on, which requires special attention.

3, to upgrade the needs of iOS, to confirm the current resources to meet the requirements of the new version. Confirm that the attribute set meets the requirements.

4, backup the original iOS and configuration files. Verify that no errors occurred during the backup.

5, upgrade iOS.

6, confirm that the new iOS has been written into Flash.

7, use the boot system (IOS) or set boot system (cat OS) to modify the startup file name, the different platform for a slight difference.

8, save the configuration, and the last time to confirm the boot parameters configured correctly.

9, Reload.

Cisco router upgrade process and attention to the matter, I believe you know how to deal with, there is a need for users to set up.