Share on whatsapp. Share on telegram. Table of Contents. Ingrid Belosa is a networking enthusiast from Croatia. She is here to help you with grasping networking concepts. What do you think about this article? Save me March 2, at am. Simon Gawar May 15, at pm. Akinola October 16, at am. Mike December 11, at pm. Leave a Reply Cancel reply Your email address will not be published. About us. Entering confreg without an argument displays the contents of the virtual configuration register and a prompt to alter the contents by describing the meaning of each bit.
In either case, the new virtual configuration register value is written into NVRAM but does not take effect until you reset or reboot the router. The following display shows an example of entering the confreg command:. You can use console download, a ROM monitor function, to download over the router console port either a software image or a configuration file.
After download, the file is either saved to the mini-Flash memory module or to main memory for execution image files only. Note If you want to download a software image or a configuration file to the router over the console port, you must use the ROM monitor command. Because the ROM monitor console download uses the console to perform the data transfer, error messages are only displayed on the console when the data transfer is terminated.
If an error does occur during a data transfer, the transfer is terminated, and an error message is displayed. If you have changed the baud rate from the default rate, the error message is followed by a message telling you to restore the terminal to the baud rate specified in the configuration register.
This information includes the reason for terminating the image, a stack dump of up to eight frames, and, if an exception is involved, the address where the exception occurred; for example:.
EPROM is not suitable for routers because it generally requires an external device such as an ultraviolet light shone through a window on the chip to erase it. What is the boot process for the router on the next reload? Why do routers have only a few interfaces?
It is possible to have multiple networks on the same interface with VLANs. Originally Answered: Will a router have more than one IP address? To manually boot into the ROMmon mode, you will need to reboot the device and break the boot sequence. By default, when the router reloads, it will read the configuration information from a file in its NVRAM.
Cisco commonly refers to this file as the startup configuration file. Most commonly, the error is caused during the boot process. If your router gets stuck in ROMmon mode during the boot process, examine the value of the configuration register by entering the confreg command. Flash is erasable and reprogrammable ROM. Skip to content Android Windows Linux Apple. Home » Linux.
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