Putty Serial Break Sequence Cisco Serial Break Length

An RJ45 Console port resembles an Ethernet port and is labeled CONSOLE on the back of.

When plugging that into a computer it assigns a COM port number to it that is not COM1.

If this is the case for you, you need to know where to look to find the correct COM port number when setting up the connection with PuTTY.

Right-click on the Windows logoStart menu and click on Device Manager to open it.

In this case you would need to use COM4 for the Serial line to make the connection.

If you do not wish to save the connection settings, skip to Step 14.

I am connecting to Cisco devices via the console port and wish to break into ROMMON.

How do I send a controlbreak key sequence Thanks in advance.

John.

Is this information helpful to accomplish what you are looking to do.

Ive tried simply entering ctrl-Break (which works using HyperTerminal in XP SP2).

Ive tried mapping F12 to TNBreak.

No joy. For now, I just fire up HyperTerm and assign it to Serial Port 1, through which I connect to the router.

After sending the break, I disconnect from HyperTerm, and connect via CRT (also using Port 1), and carry on.

If the break is not the correct length, the device will miss that a break was being sent.

TNBREAK is a telnet function to send a break when connected via the telnet protocol.

Putty Serial Break Sequence Cisco Serial Break Length

Does setting the serial break length to what the device needs allow the break to work properly.

I have no idea what the required break length is (for Cisco routers and switches), but Ill find out and give it a try.

Odd, though, that HyperTerminal works just fine -- same PC, same Cisco stuff.

Hmmm. I did have autonotify set -- instant e-mail -- but never received an e-mail.

Cisco says (in ) that the Break signal is usually 100 ms to second.

My CRT config is set to 100ms.

Ill try longer and see what happens.

I am using a USBserial converter (it turns out I no longer own a PC with a serial interface), but again, HyperTerminal works OK, CRT does not.

Please let me know what happens when the break length is changed.

What terminal emulation are you using What protocol are you using If Telnet, have you tried mapping a key (Terminal Emulation Mapped Keys) to TNBREAK.

I have a Serial connection with a console cable to console port in Cisco.

Are there any other options to send a break key to a cisco router from CRT version 6 Thanks in advance Mark.

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