Introduction to the router IOS operating system

There are still many things worth learning about the router IOS operating system. Here we mainly introduce the detailed knowledge of the router IOS operating system and the recovery file. First, let's take a look at the Flash on the vro. Flash can be vividly compared to the hard disks of our commonly used PCs, but it is far from the large capacity of the hard disk. It is mainly used to save IOS software and maintain the normal operation of the router.

If Flash is installed on the router, It is the default location used to guide the router IOS operating system. As long as the Flash capacity is large enough, you can save multiple IOS image files to provide multiple boot capabilities. Flash is mainly installed on the SIMM slot of the host, or a PCMAIC card. During the use and configuration of a vro, The vroios IOS operating system may be lost due to operation errors or system faults, leading to the failure of the vro to work properly. When the router IOS operating system is lost, the router will not be able to enter the normal working state, but you do not have to be nervous and panic, the following uses the Cisco 26 series router as an example, this section describes how to quickly restore the IOS operating system of a vroios. You can find a PC and the corresponding cable. Of course, the PC should have the corresponding fttp software and the IOS image file you need.

But before you begin to recover IOS, you should pay attention to the following issues: when connecting a PC running tftp server to a vro, you must use the first Ethernet port of the IOS operating system of the vroios. When using a connection cable, you must use a crossover cable, because this is the connection between DTE and DCE. The IP address of the tftp server can be defined at will, but must be in the same network segment as the IP address defined by the router. Well, if you are ready. Now we can start to restore: