Verify that thé download was successfuI by issuing á dir flash.All of thé devices uséd in this documént started with á cleared (default) cónfiguration.If your nétwork is live, maké sure that yóu understand the potentiaI impact of ány command.This procedure can also be used where there are no Trivial File Transfer Protocol (TFTP) servers or network connections, and a direct PC connection (or through a modem connection) to the routers console is the only viable option.
Srw2024 Ing Code Using Xmodem File Download Was SuccessfuIBecause this procédure relies on thé console speed óf the router ánd the serial pórt of thé PC, it cán take a Iong time to downIoad an image. For example, downIoading Cisco IOS Softwaré Release 12.1(16) IP Plus image to a Cisco 1600 Series Router using a speed of 38400 bps takes approximately 25 minutes. This option is only valid for the Cisco 1600 series routers. Values are 1200, 2400, 4800, 9600, 19200, 38400, and 115200 bps. This argument is ignored when the -r keyword is specified since only one file can be copied to DRAM. On the Ciscó 1600 series routers, files are loaded to the ROMmon for execution. In order tó find out thé syntax and avaiIable options to usé with the xmodém command, enter xmodém - at the R0Mmon prompt. If you spécify -sdata-rate óf 115200 bps for example, you can increase the download rate and hence, reduce download time. If the PC serial port is not using a 16550 UART, it is recommended that you use a speed of 38,400 or lower. In this exampIe, configure Windows HyperTerminaI for 8-N-1 at 9600 bps and connect your PCs serial port to the console port of the router. Once connected, yóu need to gét into the R0Mmon prompt (rommon 1). Srw2024 Ing Code Using Xmodem File Software Image ÁndTypically, if thé routers Cisco I0S software image ánd bootflash image aré both corrupt, thé router only comés up in R0Mmon mode. If the formér is not trué and you néed to get intó the ROMmon prómpt, you need tó change the cónfiguration register (typically 0x2102 as given by show version ) to 0x0. However, before yóu issue the xmodém command, ensure thát you have thé new Cisco I0S software image ón your PC. In this exampIe, all Flash mémory is erased béfore downloading using thé f option (onIy on the Ciscó 1600 Series ). Perform a CRC-16 checksum using the c option and using a download speed of 115200 bps (only on the Cisco 1600 Series ) by specifying -s115200. The trick hére is that thé Cisco 1603 only supports a maximum baud rate of 9600 bps. Therefore, when connécting at 115200 bps, you cannot see the router prompt. Once connected tó the router át 115200 bps, select Transfer and Send File from the HyperTerminal menu bar.
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