Question about Cisco 3745 Series IOS Advanced Security Feature Pack Full Version

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Is any way to download ios from tftp server at rommon mode in cisco 3745

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Have a look at http://cio.cisco.com

Posted on Nov 26, 2009

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1841 router in rommon mode cannot install flash


Basically you will need to use TFTP to get the IOS back on. HERE is an article from Cisco that explains how to do it. I have done this before and even though it takes a while to reload the IOS (because in my case I had to use a serial connection at 9600 baud) it does work.

Aug 25, 2012 | Cisco (1841) Router (cisco1841)

1 Answer

Dear Sir I have a CISCO WS-C2948G-L3 switch with me, when I power it up I get the following message :- ROMMON: Cold Reset frame @0x00000000 ROMMON: Reading reset reason register ROMMON: Valid...


It looks like the IOS is bad or not not there.
You need to instal a new IOS onto the switch.


For more help during installation you can refer
http://www.cisco.com/en/US/products/hw/switches/ps663/products_tech_note09186a00800949c3.shtml#cat4k

Dec 09, 2010 | Cisco WS-C2948G-L3 Catalyst 2948G-L3...

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Hi all. Now i'm lose IOS of cisco 2691. help me! and give me how to load IOS to Cisco 2691 by tftp. thanks alot


Recovering Cisco IOS Software imagesIf your Cisco router experiences difficulties and no longer contains avalid Cisco IOS software image in flash memory, you can download a newCisco IOS image using one of the following ROM monitor commands:
blank.gifxmodem—(AllCisco 2600 series routers) Use this command to copy a Cisco IOS imagefrom the console, if the computer attached to your console has aterminal emulator with Xmodem capability. See the "Copying an Image from the Console Using the xmodem Command" procedure.
note.gif Note blank.gifDownloadinga Cisco IOS image from a console is very slow. This procedure should beused only in an emergency and is not recommended for normal Cisco IOSimage upgrades.

For the fastest possible download from a console, set the console speed to 115200 bps by using the confreg ROM monitor command. See the "Configuration Register Commands" procedure.
blank.giftftpdnld—(ExceptCisco 2691) Use this command to copy a Cisco IOS image from a TFTPserver that is accessible through the FastEthernet 0/0, Ethernet 0/0,or Token Ring 0/0 port. See the "Copying an Image from a TFTP Server Using the tftpdnld Command" procedure.
note.gif Note blank.gifThetftpdnld command is not available on the Cisco 2691 router. Therecommended method for installing a Cisco IOS image on a Cisco 2691router is from a CompactFlash memory card loaded in the externalCompactFlash memory card slot. See the "Entering Boot Commands" procedure.

P.S.: If this information was helpful, please rate this solution.

Mar 12, 2009 | Cisco 2691 Series IOS

1 Answer

Auto backup IOS of router.


If you want to back up your Configuration on any Cisco Router, You can just use RANCID (http://adi-sunardy.net/2008/12/24/how-to-automating-cisco-router-switch-firewall-backups-on-fedora/). 
Or, some other solution:
  • ciscowork
  • ziptie
  • solarwind 
  • cirrusmanager
Or follow these instruction: http://www.techexams.net/forums/ccna-ccent/22447-how-setup-tftp-server-backup-restore-2500-ios.html
Or You can read this: http://blogs.techrepublic.com.com/networking/?p=532
Hope it'll help

Mar 11, 2009 | 2wire HomePortal® 1800HW Router...

1 Answer

I have a problem with a cisco catalyst 2948G-L3. A have erase of mistake the bootflash. I have tried in some way to download a new IOS, i have the IOS bu i cannot download it in the flash because the...


Two ways to do that are xmodem (slow) or Tftp from rommon mode. (fast)
Place the IOS image in your tftp server directory and start tftp server.
Then enter the following in the switch exactly as below as all are case sensative:
rommon 1> IP_ADDRESS=xxx.xxx.xxx.xxx
rommon 2> IP_SUBNET_MASK=xxx.xxx.xxx.xxx
rommon 3> DEFAULT_GATEWAY=xxx.xxx.xxx.xxx
rommon 4> TFTP_SERVER=xxx.xxx.xxx.xxx
rommon 5> TFTP_FILE=full file name of ios as it reads
rommon 6> TFTP_CHECKSUM=0
this one is in lower case
rommon 7> tftpdnld

If you dont have a tftp server below is a link to a free one
http://www.solarwinds.net/Tools/Free_tools/TFTP_Server/

You will need the .bin IOS image for this and not the .tar file. The .tar file contains router cluster management files that you must issue the archive tar command to load all of the files. Can do that if needed after router is back online.

P.S.: If this information was helpful, please rate this solution.

Feb 24, 2009 | Cisco Catalyst 2948G-L3 Networking Switch

1 Answer

Cisco 1721 router problem


Does the router boot to rommon mode everytime you turn it on?

There are two reasons why the router could be booting to rommon mode

1. There isn't a valid ios image loaded in flash memory
2. The configuration register is set to a number that ends with '0'

Change the configuration register setting to a number that ends in '2'. (i.e. 0x2402)

You do this with the command: confreg 0x2402 <hit enter key> (in rommon mode)

Reboot the router and it will first search for boot system commands in the startup config, if none found it will boot to the first valid ios image in flash memory.

If there isn't a valid ios image in flash memory, the router will continue to boot to rommon.

Apr 12, 2008 | Computers & Internet

2 Answers

Boot Loop


you may have to reload the OS of the router.
i dont suppose you can kick it into romon mode can you? (usually done by hitting the pause break button on boot.)

if you can you should be able to use Xmodem to reload the OS (as long as you have a copy of it located on your computer)

Mar 11, 2008 | Cisco 1603-R Router

2 Answers

Problem in installing the asdm image ASA 5520 ver 7.1


I had this same issue on my ASA 5520.

1. Copy the config and IOS image to a tftp server.
2. Format flash (disk0)
3. set rommon server, ip addy, and file settings.
4. tftpdnld
5. Once the system has booted to the image copy the asa image file, asdm image file, and config to flash
6. configure asdm image default location and reload

Feb 27, 2008 | Cisco ASA 5520 Firewall

1 Answer

FAIL UPGRADE


run wireshark,  if you see it trying to access 10.0.0.1 via TFTP, IOS was wiped,  just set a tftp server on that address and it will download the dfault image.  search cisco to find out the name of the file it is looking for, or look through the wireshark packets

Oct 07, 2007 | Aironet 1100 802.11a/b/g LWAPP...

2 Answers

Erasing the flash....


Toast...looks like you killed your entire IOS installation...it will have to be reloaded to the flash...

Aug 21, 2007 | Cisco Aironet 1131AG 802.11a, 802.11g/b...

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