3750 rommon The below is all the command I have Oct 22, 2007 · This chapter describes how to configure Remote Network Monitoring (RMON) on the Catalyst 3750-X or 3560-X switch. While transferring a new image over to the Cisco 3750 Switch teraterm seems to of added some garbled information into … Apr 30, 2013 · hello, Ios of my switch was damaged. The switch had been part of a stack, lost power, and got caught in a boot loop. I initialized the flash and I ran the following commands: switch: dir usbflash0: Directory of usbflash0:/ 2 drw- 0 . Especially recommended for those who going to deploy . SE12. I try using the ip_address but it will not take it. i already download the ios from cisco and i have tftp server. Boot sequence control, ROMmon recovery, and password reset using 0x2102 & 0x2142. Switches also have a bootstrap. I've tried to issue the Ctrl-Break command but it does Jan 25, 2012 · I read on google it can't be done on a switch to copy from tftp to flash in rommon mode on a switch and to use XMODEM. I have attached here the log file and scren shot file, is here any one who knows how to upgared rommon mode switch, please have look on my case and support me. Hi guys, I got Cisco 3750 from e-waste. I am interested in how can I first format the flash on the VXR and then transfer the new IOS trough TFTP. 2. However, it is highly recommended to plan & to prepare how to do a rollback in the worst case scenario, for example: if the router fails to boot properly due to corrupted image file or due to usage of new flash memory, etc. Due to the bootloader and ROMMON being locked, and the recovery password, I am unable to access the CLI environment. Aug 11, 2010 · We have a 3750 switch and can't enter rommon. tar image later via TFTP. i set to baud rate to 115220 and i changed back to baud rate 9600 after copie Recover a Cisco Switch Missing IOS Using XMODEM | 2960 / 3560-X / 3750-X and More STP Tech 268 subscribers Subscribe Recover a Cisco Switch Missing IOS Using XMODEM | 2960 / 3560-X / 3750-X and More CCNA CCNP Switching Lecture 04 Mac address table and Learning. I would also recommend upgrade to a newer IOS than 12. power up the switch when pressing the mode button. Get in to rommon easy Has any one found that setting the baud rate on the serial terminal to 1200 and repeatedly press space for 10 seconds after turning on a device will get you in to rommon if you have difficulty otherwise So far works on 3750G 3750X 7200VXR and 2800 routers What are your thoughts Aug 26, 2023 · While working with Cisco ASR 1000 series routers, you may find yourself in a situation where the router (or a Route Processor, in the case of modular routers) will only boot into ROMMON mode: Aug 31, 2022 · If you are having problems with uploading the IOS image in ROMmon mode, here is the complete guide on how to do so step by step. Learn how Cisco Configuration Register works. for each one, I fired it up, did a minimal config, downloaded the ios image I use in all my 3750s, gave it the following commands: boot system switch all flash:c3750e-ipbasek9-mz. RMON is a standard monitoring specification that defines a set of statistics and functions that can be exchanged between RMON-compliant console Oct 11, 2020 · Hi everyone! I did play hard with my c 3750 v2 and have decided to put myself in a trial. Here are my only option from rommon after using help break set/show/clear Nov 9, 2010 · When I connect to the 5505 through the console cable/port I am have to break the boot and go into a rommon #0>so from here how to I simple reset the box to the factory defaults and start over??? If I recall pressing/holding Mode just puts into ROMMON mode and won’t reset it. bin image suitable for your device flash size (actually, the smaller size the faster device will get it. On t Oct 23, 2025 · This tutorial explains how to back up the Cisco IOS from the running router and how to restore the Cisco IOS image file from the TFTP server using the ROMMON mode of the router. Mar 19, 2007 · I was looking to upgrade some Cisco3750G switches to the latest IOS version and would like to upgrade the ROMmon software to the latest version also. Aug 27, 2008 · This chapter describes how to configure Remote Network Monitoring (RMON) on the Catalyst 3750 switch. After reloading the switch, I’m stuck with an error saying “hardware not supported by firmware…”. Any ideas on how to reset it? Whether you bought your lab gear online or have a switch that's down and can't come up, you need to know the Cisco ROMMON procedure. One of the most common tasks performed in ROMMON mode is retrieving an IOS image from a TFTP server to restore or upgrade a Cisco device’s Dec 1, 2022 · I have 3 new (used but new to me) C3750-e. Is it possible to reset the password or preserve the configuration without deleting it? Im stuck in ROMMON mode and im pretty sure my NVRAM is bad (it says NVRAM corrupt). Expand Post Probably, you just need to wait through a boot cycle, and it will present you with a rommon> prompt (if needed), force the switch into rommon with the mode button procedure. it was successfully copied. Upload IOS via TFTP in ROMMON It is recommended to maintain your network devices with updated IOS. 150-2. i tried ctrl+breake to go to rommon mode, but i cant. See Cisco Catalyst Fixed Configuration Layer 2 and Layer 3 Switches - Cisco for details. bin command. Jan 16, 2012 · The ROMMON CLI allows you to change speed to another value but then the change you would do in IOS back to 9600 is not synchronized with the ROM as this was never supposed to happen. The IOS is corrupted an I rebooted the switch => he comes to the boot prompt . a like the AP Procedure(press butom and hold on) 3750-x switch is having an advanced feature for rommon recovery. Becaus… Feb 18, 2021 · i had to recover my cisco switch WS-C3750V2-48PS-S by copy image file to flash by using copy xmodem::c3750-ipservicesk9-mz. SE11. After bootup starts, we tried Control + C, Control + Break and tried the Br Hello Everyone, Is there another way to get into ROMMON mode with the 3750G? Right now i have the faceplate open and the mode button pressed down with a paper clip and doing the the mode recovery operation only shows all the leds staying on. 30sec); the procedure is also described in various FAQs related to password recovery of 2960/3560/3750 switches. It goes to the "switch:" prompt when I power up the switch. Nov 25, 2008 · My site tech fumbled the IOS upgrade on a 3750 switch and now its stuck in ROMMON> I cant find the link to the Cisco document that discusses troubleshooting a 3750 switch that is stuck in ROMMON -- including ROMMON commands. I’d try to find your USB to console cable. For CCNA. May 25, 2010 · Whatever register I set the router goes into ROMMON mode. Apr 27, 2007 · Hi, I have a problem with a 3750 switch in a stack . I receive: switch: xmodem Unknown cmd: xmodem Not sure why I am getting this. Sep 25, 2012 · Hi very annoying, but I want to recover the password or set the cisco 3750 to the default password, as forget it. The "MAC_ADDR" environment variable is not set. I was just wondering if there is anything I can try before I go and buy a memory stick Catalyst 3750 Switch Bootloader Commands During normal bootloader operation, you are not presented with the bootloader command-line prompt. Recover from lost or forgotten enable secret/password or user account password without factory reset. But it didn't work, Is the May 23, 2025 · ROMMON Mode: In Cisco networking, the ROMMON (ROM Monitor) mode is a low-level operating mode that provides limited functionality, allowing administrators to troubleshoot or recover the device in case of issues such as a missing or corrupt IOS image. follow the procedure, we can set the ipaddress even in the rommon prompt and transfer the image. 122-55. when it start and falls into rommon mode, I can´t access to the flash. dat. (keep the mode button pressed while power-on for ca. pressing the mode button for 30 sec then you are in Rommon mode. Unless otherwise noted, the term switch refers to a Catalyst 3750-X or 3560-X standalone switch and to a Catalyst 3750-X switch stack. Nov 20, 2007 · Hello, 1760 router image file is to large for the available memory. dat files), you have to enter "flash_init" from ROMMON, because the boot process will be interrupted before initializing access to the flash. May 14, 2013 · Hi, I have this c3750v2 with a corrupted IOS and was not able to boot. The Supervisor module image can sometimes Feb 18, 2011 · hi folks how to reset the 3750 to factory default,a. This happened because I wanted to add this Not sure how to reset your Cisco 3750 series switch? Don't worry, with this guide from GreenTek Solutions, you'll be up and running in no time! Learn the steps needed to reset your switch easily. How do I re-upload the IOS back to this switch? Can I do it via TFTP? The Cisco old doc only mention about xmodem transferred. To access the files in flash from ROMMON (for example to delete the startup-config and vlan. To bypass this problem is just by let the router boot-up with the IOS Feb 6, 2014 · How-To Recover a Cisco Switch from Boot Loader 3560/3750 February 6, 2014 / Balaji Bandi / 0 Comments Recovering from a Software Failure Method 1: Transferring IOS image using TFTP Switch software can be corrupted during an upgrade, by downloading the wrong file to the switch, and by deleting the image file. Nov 26, 2008 · Solved: i am working with 3750 Switch and its ios was removed now it is in Switch: mode, someone plz help me to upload the ios. I want to tftp the IOS image but I can't set the ip address on the router. disk 9 drw- 0 Aug 22, 2019 · There is small boot file I think called ROMMON that could get damaged or overwritten . I've done a similar recovery on AIR-CAP2702I-Z-K9 but it is a newer device with TFTP available in ROMMON. Nov 16, 2009 · dear experts, I am unable to boot successfully 3750 switches, i tried the recovery procedure then through x-modem i uploaded the ios image and it was successful during the ios image upload through xmodem it is showing total retries 80 and last error: got retry request then the image is uploaded to switch and the message succesully copied to ios image , but the switch boot and stops in the Sep 13, 2006 · This page explains how to recover a Cisco 3600/3700/3800 Series Router stuck in ROMmon, rommon prompt. I tried to ctrl+break it, but it doesn't work either. bin flash: c3750-ipservicesk9-mz. Does anybody have an alternative ? Otherwise it will take ages via Sep 10, 2011 · While the ROMMON allows for quite sophisticated debugging and tracing of the IOS operations (provided you also have developer information a particular IOS image build), the Catalyst bootloader is only capable of basic recovery functions. Nov 14, 2005 · I was hoping to do a rommon, then download the file from hypertrm but it doesnt seem to work? any other ideas, thanks delete -- Delete file (s) dir -- List files in directories flash_init -- Initialize flash filesystem (s) format -- Format a filesystem fsck -- Check filesystem consistency help -- Present list of available commands Aug 5, 2008 · Can anyone answer whether or not the tftpdnld command is on a roadmap for future releases of 3560/3750 switch rommon code? We have run into several circumstances where this seemingly simple command would have saved us numerous hours of waiting on a 9600 baud transfer. May 1, 2012 · This chapter describes how to identify and resolve software problems related to the Cisco IOS software on the Catalyst 3750-X or 3560-X switch. Since IOS 12. Where do you find the 37 Aug 4, 2011 · Solved: Tell me please is there any way to boot catalyst 3750 (3560, 2960) switch from tftp? 1 day ago · Cisco Catalyst 3750-X & 3560-X password recovery process. It has always worked in the past. Configuring RMON This chapter describes how to configure Remote Network Monitoring (RMON) on the Catalyst 3750-X or 3560-X switch. bin write mem reload the first 2 switches, worked no problem. You have to do further wiping of the config after you’re in. Nov 30, 2015 · Hi, how can I get Rommon in cisco 3750X? I was trying below steps but not to do something: 1. for 3750-x switch we do not have to waste time like that. May 27, 2012 · Dear all, I am having big problem with cisco 3750V2 switch, the switch in rommon mode now, I have try to upgrade through Xmodem but no. Feb 17, 2014 · How do you reset or bring back to defaults the results from typing “set” while in cisco rommon mode. Any ideas how to get into rommon? Also tried some break key sequences at bootup that had no effect. The router boots into rommon. unplug the power cord. Jan 16, 2025 · Hello, I have an issue with my 3750E switch. Jun 22, 2009 · Core Issue These are three ways the router can enter ROM Monitor (ROMmon) mode (rommon#>): Reload, initialize, or power cycle the router with the configuration register boot field set to 0 Reload, initialize, or power cycle the router without having a Cisco IOS Software image to boot from Press th May 10, 2016 · Hello, I have tried copying an IOS image from USB to flash on a 3750X-48P-L Cisco switch. Dec 4, 2024 · This document describes how to recover Cisco Catalyst fixed configuration switches from a corrupt system image or an incorrectly set boot variable. Can u get switch to Switch mode (aka ROMMON mode) ? Press and hold mode button while powering on switch or press and hold mode button within 1st 10 sec after power on Oct 11, 2020 · Quick guide for Xmodem feature (file transfer via Console line) for old devices alike c3750 Prerequisites: 1) . press the mode button and hold it. I saw this first on a Cisco Catalyst 3750-X, and it took about 20 minutes to upgrade…ouch! May 20, 2011 · Dear Team, I have multiple os stored in my flash, as my upgraded os is crashed I want fall back to old os stored in flash, Is this possiblie to change the boot system from rommon. Step 1 Connect your PC to the switch Ethernet management port. this is what happens when start: The password-recovery mechanism is enabled. for other switches we used to do xmodem recovery. Depending on the nature of the problem, you can use the command-line interface (CLI), the device manager, or Network Assistant to identify and solve problems. I have recieved a new 3750 switch with a newwer ROMmon version on it can the ROMmon be copied from the switch and if so how. At the same time even if you break again into ROMMON you cannot set another speed or unset it. I'm trying to copy the file via tftp in rommon mode but he doesn't seem to know the command tftpdnld. I'm trying to factory reset it, but a mode button doesn't work and I don't know the enable password. if possible what are the steps Thanks Manu B. k. If Feb 12, 2010 · Right at the moment I'm sitting in one of our wireclosets, watching an c3750 (hopefully) recovering its mind to its old function and behavior - through an XModem transfer of its current IOS. The reason: I want to be prepared for unpleasant surprises that may occur in the future for any reason. However in rommon there is no way to set up the TFTP varibables? Can a 3750 be booted from a TFTP server, and if so is it possible to set this up from the ROMMON? Load into ROMMON mode and clear the startup config and vlan. Jul 8, 2010 · Guys, I've a 3750-E Series PoE-48 switch, I've put the wrong IOS on it and it keeps rebooting. Unless otherwise noted, the term switch refers to a Catalyst 3750-X or 3560-X standalone Apr 22, 2025 · This document describes the steps to upgrade the software image on Cisco Catalyst 3750 series switches with the command-line interface (CLI). I guess you tried it already. The password recovery functionality is enabled, and we tried connecting with hyperterminal on both a Dell Inspiron laptop and also tried a Dell 2970 running Windows Server 2003. Anyone have any off hand? Thanks Apr 25, 2015 · Today, I updated the IOS of our Cisco Catalyst 3650 switch using a 3750 Catalyst image. Jun 22, 2009 · Cisco Community Technology and Support Networking Networking Knowledge Base Cisco Catalyst switch in ROMMON mode ("switch:" prompt) after a software upgrade Bookmark | Subscribe Nov 30, 2007 · I am trying to xmodem an image to flash but when I enter the command in rommon to xmodem. Unless otherwise noted, the term switch refers to a standalone switch and to a switch stack. RMON is a standard monitoring specification that defines a set of statistics and functions that can be exchanged between RMON-compliant console systems and network probes. It's different on different platforms, but the process is similar. My problem is I do not have access to it, I ssh into a 3640 which is an access server for all devices and that is how I have console to it, if any one has suggestions on how to use XMODEM over ssh please let me know. 2 (50), some switches will automatically upgrade the bootstrap when you upgrade the IOS image. 3. RMON provides you with Nov 7, 2010 · I was wondering, when you set up the the boot varibable on a 3750 switch you have the option of setting TFTP as the source for the IOS file. System just keeps reseting. Sep 3, 2013 · I unplug the power, hold the mode button for over 30 seconds while powering on but the system still won't go into rommon mode. can you please help me with the steps? thanks Abhishek Nov 7, 2020 · Introduction Recover Switch from a Corrupt or Missing Image in ROMmon Mode Recover Switch from a Continous Reboot Recover from a Corrupt or Missing Image Feature Information for Recovering a Switch Introduction This section explains how to recover a Catalyst 9400 Series Supervisor from a missing or corrupted system image, or an incorrect boot variable. 4. xeoclb zndnz jranyqwt qyjdih cvzbj xaxhyrc zkqw nwi qye ukuxzn czzd jkdqtbo rvqobx oojg izwzio