How do you send a "Break" on puTTY to a cisco 2600 Terminal server

[michaelseare]

I have a cisco 2621XM Terminal server connected to A router.  The Terminal server has 32 ports and connected to 32 cisco deviceses. I was trying to login one of my Router which is cisco router 7609 that has a sup-720. The sup-720 failed and I was trying to upgrade the IOS on the sup-720. when I reload it and send a "BREAK" from the puTTY it didn't work.  Is there any way I can send a BREAK from the puTTY or push any key that works.

Thanks.

[paolo bevilacqua]

Ravi Singh wrote:
Standard Break Key Sequence Combinations During Password Recovery
you can use the key combination of CTRL+Break.
or
right click on the header of putty / Special Commands / Break.

Just as others before, you are not understood the question.

That is, how to send break from a Cisco asynch interface, not how to send break from Putty with serial connection.

Read answer by myself.

[Bab L]

Legend. Thank you. Ive been using Putty ofr year never realised the Break command. I couldn't get any of my Mac buttons to work with the VM. It solved my problems.

[tobyarnett]

Break Sequence for Cisco devices

The change in computers that have moved away from serial ports and an actual “break” key on the keyboards makes it difficult for many people to get a Cisco device to drop to rommon mode on startup for recovery procedures. Now that laptops do not come with serial ports by standard and require a USB to serial adapter for network engineers to console into devices this has also caused issues with traditional break sequences.

The most common programs like HyperTerminal, Putty, and SecureCRT have a break sequence which is “Ctrl-Break”. The fact that many computers, laptops, and keyboards do not have a “break” key makes it very difficult to drop into rommon when accessing a Cisco device from the console port.

A rarely known trick to accessing the rommon mode of a Cisco device can be done without the use of the “break” key. It is more involved, but considering that most people will reload a switch/router numerous times in frustration to get the rommon prompt that this trick is actually a faster method.

Simulated Break Sequence for Cisco Devices:

The best method that I have found to work time after time is a simulated break sequence. This is a very straight forward method. Start with the router (or device – will reference router for simplicity) powered on. Access the routers console port with the standard console connection settings:

9600 baud rate

No parity

8 data bits

1 stop bit

No flow control

Once the prompt is up. Press enter to get some commands to the device even if it is to get the “login” to fail from a failed login attempt. Once done, change your console settings to the setup below.

1200 baud rate

No parity

8 data bits

1 stop bit

No flow control

Once the baud rate is changed then you will no longer see any new responses on your screen. Power cycle the router and immediately press and hold the space bar. Keep it pressed for about 10 – 20 seconds. Change your Baud rate back to 9600 and press enter. You should be in rommon mode. If not then repeat and hold the space bar down longer.

This process has worked for me on every device I have tried it on. Try it next time your stuck looking for the break key on your keyboard. For those that do have the Break key here are the known sequences below. IF those don’t work – try the above.

Good luck!

[ericcamacho58406]

• yes I was wondering if you could help me. I bought 3 1721 cisco routers used. the original owner didn't give me his password. im having trouble wiping them back to factory setting. I've done tried using "break" from the keyboard all the different ways to do and left clicking to special command. nothing has work. I spent countless hours trying to get to rammon so I can factory reset it. if you know any other way to reset the router can you please help me out. 

thank you- eric 

[Super_Fly]

Thank you, thank you, thank you!

[tobyarnett]

Known Break sequences for various programs just so that it is out there of what it should be.

[JuanGutierrez4919]

I've tried everything without succes, please help me with this. I have used differents console Putty (CTRL-Break), TeraTerm(SendBreak o Alt-B), Hyperterminal(Break) I am not able to avoid the following:

System Bootstrap, Version 15.2(3r)XC, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 2012 by cisco Systems, Inc.

Total memory size = 512 MB
C892FSP-K9 platform with 524288 Kbytes of main memory
Main memory is configured to 32 bit mode

Readonly ROMMON initialized
program load complete, entry point: 0x4000000, size: 0x18c40
program load complete, entry point: 0x4000000, size: 0x18c40

IOS Image Load Test
___________________
Digitally Signed Production Software
program load complete, entry point: 0x4000000, size: 0x40fe200
Self decompressing the image : ################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################################ [OK]
*** No sreloc section
Smart Init is enabled
smart init is sizing iomem
TYPE MEMORY_REQ
Onboard devices &
buffer pools 0x022ECEC0
-----------------------------------------------
TOTAL: 0x022ECEC0

Rounded IOMEM up to: 34Mb.
Using 6 percent iomem. [34Mb/512Mb]

Restricted Rights Legend

Use, duplication, or disclosure by the Government is
subject to restrictions as set forth in subparagraph
(c) of the Commercial Computer Software - Restricted
Rights clause at FAR sec. 52.227-19 and subparagraph
(c) (1) (ii) of the Rights in Technical Data and Computer
Software clause at DFARS sec. 252.227-7013.

cisco Systems, Inc.
170 West Tasman Drive
San Jose, California 95134-1706

Cisco IOS Software, C800 Software (C800-UNIVERSALK9-M), Version 15.3(3)M2, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2014 by Cisco Systems, Inc.
Compiled Thu 30-Jan-14 02:12 by prod_rel_team

This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to
export@cisco.com.

Installed image archive
Cisco C892FSP-K9 (revision 1.0) with 488524K/35763K bytes of memory.
Processor board ID FTX183783ZX
10 Gigabit Ethernet interfaces
1 Virtual Private Network (VPN) Module
DRAM configuration is 32 bits wide
255K bytes of non-volatile configuration memory.
250880K bytes of ATA System CompactFlash (Read/Write)

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Would you like to enter the initial configuration dialog? [yes/no]:
% Please answer 'yes' or 'no'.
Would you like to enter the initial configuration dialog? [yes/no]: agree to comply with applicable laws and regulations. If you are unable
% Please answer 'yes' or 'no'.
Would you like to enter the initial configuration dialog? [yes/no]:
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Would you like to enter the initial configuration dialog? [yes/no]: to comply with U.S. and local laws, return this product immediately.
% Please answer 'yes' or 'no'.
Would you like to enter the initial configuration dialog? [yes/no]:
% Please answer 'yes' or 'no'.
Would you like to enter the initial configuration dialog? [yes/no]:
% Please answer 'yes' or 'no'.
Would you like to enter the initial configuration dialog? [yes/no]:
% Please answer 'yes' or 'no'.
Would you like to enter the initial configuration dialog? [yes/no]: A summary of U.S. laws governing Cisco cryptographic products may be found at$f U.S. laws governing Cisco cryptographic products may be found at:
% Please answer 'yes' or 'no'.
Would you like to enter the initial configuration dialog? [yes/no]:
% Please answer 'yes' or 'no'.
Would you like to enter the initial configuration dialog? [yes/no]: http://www.cisco.com/wwl/export/crypto/tool/stqrg.html
% Please answer 'yes' or 'no'.
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% Please answer 'yes' or 'no'.
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Would you like to enter the initial configuration dialog? [yes/no]: DRAM configuration is 32 bits wide
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% Please answer 'yes' or 'no'.
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% Please answer 'yes' or 'no'.
Would you like to enter the initial configuration dialog? [yes/no]:
% Please answer 'yes' or 'no'.
Would you like to enter the initial configuration dialog? [yes/no]: 250880K bytes of ATA System CompactFlash (Read/Write)
% Please answer 'yes' or 'no'.
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Then the load stops and I cannot do it anything.

Please help this is driving me crazy!!!!

Thanks in advance

[kravetc]

Try "CTRL + SHIFT + 6 + B"