Preface
This page explains how to retrieve the Cisco 3600 Series routers (romon # > prompt) stuck in ROMmon.
Components used
This article is not limited to specific software and hardware versions.
The information provided in this article is created from the device in a specific laboratory environment. All devices used in this article begin with a default (default) configuration. If working on a real network, make sure you use it before knowing the potential impact of all commands.
Finding effective mirrors in flash memory
The first thing you need to do is send itThe dev command discovers which devices are available on your router:
rommon 1 > dev Devices in device table: idname flash:flash slot0:PCMCIA slot 0 slot1:PCMCIA slot 1 eprom:EPROM rommon 2 >
Secondly, sendThe dir [ device ID ] command is available for each flash or PCMCIA device, and then look for a ® valid Cisco IOS software image:
rommon 3 > dir flash: File size Checksum File name 5407884 bytes (0x804b4c) 0x6ba0 c3640-is-mz.121-5 rommon 4 >
Try to guide from this mirror. If the file is valid, this brings you back to normal operation mode:
rommon 5 > boot flash:c3640-is-mz.121-5
program load complete, entry point: 0x80008000, size: 0x804a30
Self decompressing the image : ###########################################...
If the files are not valid, you must use any of the following procedures to download the new one:
Use another router to get a valid Cisco IOS software image to PCMCIA card
In the case of having a similar router or in the case of having a compatible PCMCIA flash card file system (see at least one other routerPCMCIA file system compatibility table), you can also use the flash card to retract the router.
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If the two routers are the same (same series), you can boot from the other router with the flash card that you want to reclaim. You can then download the normal way to valid mirrors (seeSoftware Installation and Upgrade Process)。
3600 routers run their Cisco IOS software from Dynamic RAM (DRAM), so you can remove the PCMCIA card when the router is running.
If the two routers are different but have a PCMCIA flash card file system compatible, you can use another router to load the Cisco IOS software to a flash card, and you can then move it to the router you manage to retrieve.
Download using Xmodem from ROMmon
You can also download a new Cisco IOS software through the console port, using Xmodem. goDownload process using ROMmon's Xmodem console。
In addition, you canpassConsole port executionROMmon image download using Xmodem with improved console speed。
Article entry: csh Editor in charge: csh