Dead RB 450 - firmware upgrade - how to

RouterOS General
1

Hi,
I accidentaly killed my routerboard 450 when i tried to upgrade RouterOS.

I would like to flash the firmware and then install the new RouterOS.
But i can’t connect to him at the boot time with Windows HyperTerminal (WinXP).

I’ve got RB 450 connected to PC with crossover Ethernet cable (IP: 172.16.0.10 Netmask: 255.0.0.0) and serial to USB cable.
I installed USB to serial cable drivers, then set the Prolific USB-to-Serial COM7 port to: 9600b/s, 8data bits, no parity, 1 stop bit, hardware flow control (or none).
I never worked with HyperTerminal before and i dont know how to connect → new connection to COM7 with VT100J emulation didn’t work = status in status bar is connected but i can’t see anything at terminal window.
I tried to unplug RB from power source, then plug again and then i hit a key on keyboard (it should show the boot menu) but nothing happened.

How can i determine if even the serial cable is working (Windows says in device manager, that it is ok)?

Thanks for reply

2

The settings are 115200-8-N-1 with hardware flow. VT100 emulation is correct.

3

I tried 115200-8-N-1 with the same result.

4

OOPS! Did I fail to mention the serial cable must be a null-modem cable (like serial version of ethernet crossover).

EDIT: NewEgg has DB9 null-modem adapters.
http://www.newegg.com/Product/Product.aspx?Item=N82E16812200087

5

OK, is there some option how to emulate this via software?

I found: http://sourceforge.net/forum/forum.php?forum_id=895871 , but I’m afraid that it is something little bit different (thisPC to thisPC).

6

I don’t think so. Serial ports are pretty much hardwired. Almost impossible to turn them around. One pin is strictly send, another is receive.

EDIT: What is the box doing? Is it beeping on start? Does it double-beep when booted?

7

It’s just a single beep and RJ-45 port diods brifly blinking. Then the active RJ-45 port normally glows.

8

Looks like you may need that null-modem cable/adapter. Just so you know, it takes a while for that upgrade to complete. Are you waiting a couple of minutes after power-on?

EDIT: Also search this forum for “netinstall”. I have not used it, but it may help you.

9

A Cisco rollover cable with DB9 adapter works for the serial port.

http://www.roc-noc.com/product.php?productid=58&cat=8&page=1

You might be experiencing a problem with the serial>USB adapter.

I made sure that my laptops had real serial ports when I bought them since we use serial cables often to configure switches and routers.

Good luck,

Tom