Recover iOS for cisco3550 switch with Xmodem

1 , connect the switch console port and the computer serial port 1 with the control line, connect with the terminal software with Xmodem function (Win2000 and XP Super terminal will take this function). 2 , set the connection mode for the serial port 1 (if the other serial port is connected to choose another serial port), the rate of 9600, no calibration, no flow control, stop bit 1. Or you can click the default settings. 3 , the connection after the computer returns the switch has no iOS interface, the general prompt is: switch: 4 , unplug the power cord after the switch 5 , press and hold the mode key on the left side of the switch panel (the general switch has a key), and plug the switch into the power supply behind the switch. Until you see the Ethernet port LEDs that do not have wiring on the switch panel are lit and several system LEDs on the switch are always lit. 6 : Enter copy instruction: Switch:copy Xmodem:flash:image_filename.bin My actual instructions are: Switch:copy Xmodem:flash:c3500xl-c3h2s-mz.120-5.wc5.bin The following prompt appears: Begin the Xmodem or xmodem-1k transfer now ... 7 , the system prompts constantly appear c This letter can begin to pass the file 8 , click the HyperTerminal menu: Transfer---Send a file, select the Xmodem or xmodem-1k protocol in the Protocol option, and then select the iOS image file (*.bin) to start the transfer. 9 , because can not change the rate, so the transmission is very slow, my approximate transmission of about 40 minutes, please wait patiently. Ten , after the transfer is complete prompt: File "Xmodem:" successfully copied to "Flash:c3500xl-c3h2s-mz.120-5.wc5.bin" Switch One , enter at the prompt Switch:boot Enable the new iOS system - and re-power to complete the recovery work.

This article from "Liu Xiao Rabbit" blog, declined reprint!

iOS for cisco3550 switch recovery with Xmodem