Cisco WAN :: 1841 - Router Automatically Goes To ROMmon Mode
Feb 9, 2012
I have one problem in my Client end router cisco 1841.
Everyday we switch on the router it will automatically goes to ROMMON mode.
So i take remotly and check wheather the IOS is corrupted or not.
So i use the command dir flash: to check IOS is available or not. i found the IOS is there.But it is not boot from IOS.
So i use the coomand boot xxxx.bin to boot from IOS.and finally it booted.
They told to use the coomand confreg in the ROMMON mode.
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Mar 19, 2011
On new 1841 Testing Router, I deleted the flash & did the reload. After reloading, instantly I entered into the Rommon mode. I have a backup of the flash in my TFTP Server, which is connected to the 1841 Router. how can I restore my flash file into my 1841 Router. I can not get myself out of Rommon mode. I also now even can not ping the TFTP Server as well. Do I have to configure in the Rommon mode ?
how to restore the flash image via TFTP Server on my 1841 Router.
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Mar 4, 2012
we have 55 of the 1841 routers here, and one of them always boots to ROMMON from a very cold (down 1 hour or more) start. The image on all 55 is c1841-ipbasek9-mz.124-24.T4.bin. 32 MB Cisco brand flash. Here's what's been done thus far:In ROMMON changed to 0x2102. Then 'reset' and the image boots fine. Change config-reg to 0x2102. Save config. Reload and image boots fine again. Wait an hour or more and boots to ROMMON.Boot from ROMMON to USBflash0: Format the CF then copy over the bin file. Change to 0x2102 and save. Reload and image boots fine again. Wait an hour or more and boots to ROMMON.Swapped CF with another unit. Again, works fine to reload, but shut down and restart an hour or more later and boots to ROMMON. Format this CF and copy over image while on router. Image boots fine. Wait an hour or more and boots to ROMMON.In each case of very cold start the configuration register has reverted to 0x0 {why it boots to ROMMON}Tried dx mode with 0x8001. Nothing seen that is unusual to me, but I'm not an expert by any means.It doesn't seem to a CF card problem, but could be a connection to the CF card and then something behind that.
Here is the output of diagnostic boot mode:
Cisco 1841 (revision 7.0) with 116736K/14336K bytes of memory.
Processor board ID FTX1231W0JA
2 FastEthernet interfaces
2 Low-speed serial(sync/async) interfaces
DRAM configuration is 64 bits wide with parity disabled.
191K bytes of NVRAM.
[code].....
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Jun 9, 2011
loading a new bin file onto a Cisco wirless access point ,the access point i have found is only in rommon stage
Access point model is : ap1231g-e-k9.
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Apr 4, 2012
I upgrade to a Flash 32mbs memory stick, as I reboot the 2600 Cisco router, it appear in the ROMMON mode, nonetheless, I followed some wrong procedure by changing components on the ROMMON command line. however now the router reboot or start with symbol only V2V2v2a, and I can no longer enter the ROMMON Mode or key anything in. I have a copy of the IOS on my TFTP server.
[Code]....
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Dec 10, 2011
I'm currently pursuing to take my CCNA and am currently studying for it, but have recently encountered a problem with one of my 1760 routers that I can not solve.Yesterday I went to boot up my router like normal, however when I went into hyperterminal I noticed the router was in Rommon mode. Thinking I could change the configuration registry, I tried to bypass the NVRAM by using confreg 0x2142. However this still causes the router to go into Rommon mode. I am getting an error that states that there is insufficient memory to load the IOS image. [code]
I have used the dir flash: command and can see the IOS image, and try to boot from it (boot flash:iosimagename) but it will still go back into rommon mode. I also just swapped the RAM from my other 1760 into this 1760 and it booted up and went into normal configuraiton mode without any issues. However, the other router now will not load it's IOS image and I get the exact same error.I'm at a loss here, and have searched to figure out where or how I can just wipe the router clean to try and start fresh, but cannot get out or Rommon mode. The only thing I can think of is that the RAM went bad since it wont boot up either machine.
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Sep 22, 2010
I've ended up in rommon mode on my new"old" RMA'ed ASA5505, and I'm stuck there, I'v tried to erase Disk0 and all that, and tftp'ed a new image into the box, but when booting I get the message :
INFO: Unable to read firewall mode from flash
WARNING: Unable to write firewall mode to flash, this is normal if flash is not formatted
Running Activation Key: 0x00000000 0x00000000 0x00000000 0x00000000 0x00000000
This activattion key is invalid, use default settings only
i2c_write_byte_w_suspend() error, slot = 0x0, device = 0x40, address = 26 byte count =1. Reason: I2C_UNPOPULATED_ERROR
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Jun 4, 2013
Is it possible to use the mgmt port when in rommon mode? I use the Mgmt port when IOS is loaded and it works fine. I reboot the router, issue a break to put it in rommon and have set some variables but my Mgmt port never has link and I cannot ping it from the network. In rommon mode it looks like this:
PS1=rommon ! >
MCP_STARTUP_TRACEFLAGS=00000000:00000000
BOOT=bootflash:asr1000rp1-adventerprisek9.03.07.03.S.152-4.S3.bin,1;
IP_ADDRESS=10.71.50.101
IP_SUBNET_MASK=255.255.255.0
DEFAULT_GATEWAY=10.71.50.3
BSI=0
RANDOM_NUM=1133006948
RET_2_RTS=13:38:27 EDT Wed Jun 5 2013
RET_2_RCALTS=1370453907
?=0
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Feb 23, 2012
i try to recover cisco ASA 5505 IOS in Rommon mode but i have this message : [code]
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Dec 7, 2012
I have configured Cisco 1841 router. My problem is what if every first time a user opens the browser will display a web page server. My web server ip address is 10.10.1.5. [code]
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Dec 16, 2012
I have 6509 E. Actually what happen it last 3-4 times it reload its self and got stuck in rommon mode, i tried to boot it with boot by connecting a console cable on supervisor 720 2b. What and where is problem and why is stuck in rommon after reload.
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Oct 5, 2008
I am trying normal password recovery for (cisco routers) for IAD 2400 but iam unable to get in rommon mode ?
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Dec 12, 2012
I have a Catalyst 4506e that works fine but if reload, it boots in rommon mode. I can start it with a boot command, but by default, i must type a command. My config-register is 0x2102.
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Jan 24, 2012
I have a 3550 switch that was replaced at a remote site with no IOS. This is a switch not a router so tftpdnld does not work.
[Code]...
The problem is the switches interface never comes up so try to connect to the tftp server. 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. 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, how to use XMODEM over ssh.
But I'm fairly certain that there has to be a way to just copy it from tftp? I have a 3550 local and when I put it in rommon mode it stops the port check at port, port 1 goes from green when you plug it in to off then port 2 changes to amber and the rest green. So just by the look of this I would believe tftp would work; you just need to use port 1.
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Jan 28, 2011
How can i Upgrade Catalyst 2960 switch software in Rommon mode (switch:)
Right now flash is empty.
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Sep 17, 2012
I'm configuring a console server for configuring remote devices. This is working well except for the fact that if a target device is in ROMMON mode, the console server refuses to displays the target device console. It does open the connection but the ROMMON prompt is not shown on the console server . This is essential for this device as we will need to use it to reset passwords remotely and thus need to be able to access ROMMON mode from the console server.
Parts used are a 2951 router and a HWIC-8A serial card. Posted my config below:
[code]
Current configuration : 4389 bytes
!
[Code].....
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Nov 28, 2012
We have a cisco catalyst 6509 with Supervisor Engine . After power outage, the switch always start in Rommon mode. Configuration register is 0X2102, we want to it always start in normal mode. What should i do?
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Aug 7, 2012
I have a 512MB USB Flash device and was able to boot the IOS on the C2960 from it.After that i tried to Copy the IOS file from the USB to the system flash, but it could not find the USB Device.At plugging in the device the systems tells me: "Transfer type 2 not supported" I configured the USB device in NTFS and FAT both are able to boot with the ROMMON, but the normal system does not accept them and i know i can do the copy over a TFTP from my laptop, but it is strange that rommon accepts the usb device and the system does not?
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Oct 21, 2012
I have one cisco 4507R+E.My question is if the IOS of the acive SUP crushed and the switch is running through it's second SUP then how to restore the IOS of the first SUP.Also how to access the ROMON mode of the crushed SUP when switch is running through second SUP.
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Jun 28, 2011
I used to have ATT DSL but we recently switched to U-Verse. I have a Trendnet TEW-452BRP 54g wireless router than was handling the PPPoE function. It was set to work flawlessly with my wireless cards. No dropped connections, speed or security issues. It always connected quickly from wake up and on start up. Now we have a 2Wire i38HG wireless router/gateway and it's been difficult to properly set my network up as before. I use the Trendnet behind the 2Wire as my wireless router. Took me a while to figure out what to do, but DHCP is disabled on Trendnet so 2Wire does what it needs to. This option works fine for me. The only problem is that at first my wireless card would not automatically connect to the network through the Trendnet when it is in range like I had it set to do previously. When I would force it to, after 3 times it would magically connect on it's own. I made some changes in the Trendnet (Mainly disabling dynamic DNS and NAT) and that seems to have made a difference. To be honest, I don't know if that is significant or not or if it actually made a longterm difference but it seems like it has. So my problem is now that when I put my laptop to sleep and have it wake up, it does not automatically reconnect. It takes about 2 minutes then it does on its own. I read the event viewer and this is the info it gave me - Your computer was not able to renew its address from the network (from the DHCP Server) for the Network Card with network address 0x0018DE0682D8. The following error occurred: 0x79. Your computer will continue to try and obtain an address on its own from the network address (DHCP) server.
Level - Warning
OpCode - IpLeaseRenewalFailed
Source - Dhcp-Client
Then after 2 minutes -
Your computer was not assigned an address from the network (by the DHCP Server) for the Network Card with network address 0x0018DE0682D8. The following error occurred: 0x79. Your computer will continue to try and obtain an address on its own from the network address (DHCP) server.
Level - Error
OpCode - IpAddressNotAssigned
Source - Dhcp-Client
After this, it connects by itself. I don't believe I have configured the 2Wire or Trendnet properly, so I need some guidance and suggestions on this matter.
Laptop - Intel Core Duo 1.66ghz, 2gb Ram, Win7 Professional with SP1, Intel PRO Wireless 3945ABG
2Wire - 192.168.1.254
Trendnet - 192.168.1.1
- I did not change the IP of the Trendnet and I am not sure if I have to.
From the 2wire - Private Network
Router/Gateway Address192.168.1.254
Subnet Mask255.255.255.0
Private Network DHCP Info
Range192.168.1.64 � 192.168.1.253
[code]....
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Feb 10, 2013
I have a Dell Inspirion M5110. Windows 7, 64 bit.
When ever I open the lid to the laptop it takes 5-10 mins before it will automatically connect to a network. Diagnose this network does not find anything, nor provides any troubleshooting. Typically if I open the network connections center and disable the wireless, let it sit for 30 secs or so, and re-enable, it will finally connect.
I know it's not my router, as the laptop does the same thing at work, and multiple different friends house.
I've confirmed that DHCP is set to automatic connect. I've also checked Device Manager/Network adapters/ and unchecked the box "allow the computer to turn off this device to save power"
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Feb 16, 2012
I'm having a little trouble with a router I have got my hands on to practice for my CCNA.Im connected via serial>USB adapter and via XP HT on Win7. Router boots and I then break the boot sequence with ctrl-break. But then it does not go into ROMMON mode. It simply says this:
-System Bootstrap, Version 5.2(8a), RELEASE SOFTWARE
-Copyright (c) 1986-1995 by cisco Systems
-2500 processor with 2048 Kbytes of main memory
How I get it into ROMMON to reset the password on it.
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Dec 21, 2012
Im trying to get into Rommon, Im reading thats the BREAK button, which im assuming obviously its the pause/break button on my keyboard, im pressing it till my finger turns blue a billion times and still no rommon noodles for me.
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Nov 24, 2012
I do not have a cross over cable and have to use xmodem. I set the baud rate to 115200 and I can see everything fine. Using Tera Term when you send the file via xmodem it freezes and closes on packet #3 or about 384 bits. When simply clicking the send file button you get the error-
*** Reserved LVL 7 Interrupt ***
PC = 0xfff0bc98, Vector = 0x500, SP = 0x80004c4c
Not sure what to do from here. I have tried everything.Error you get when you boot the router:
System Bootstrap, Version 12.2(1r)XE1, RELEASE SOFTWARE (fc1)
TAC Support: [URL]
Copyright (c) 2001 by cisco Systems, Inc.
C1700 platform with 32768 Kbytes of main memory
loadprog: bad file magic number: 0x0
boot: cannot load "flash:"
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Feb 13, 2013
Cisco router 3945 when unpacked from the box and powered on , it was not able to find boot loader image and booted in ROMMON mode. tried to boot from the external flash and tftp but still not able to.
We replaced router chassis 2 times and both the times faced the same problem.
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Feb 26, 2013
How can we know that 6500 and 7600 series switch and router are running in native mode or in hybrid mode.
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Aug 14, 2012
So I have recently bought a modem which has Wi-Fi in it..I use every holidays! When I bought the modem, I set the modem correctly by putting its CD in my PC & following it..But the last week when I opened the internet, the internet was telling that DNS server failed to look-up.. or something like that in my Google Chrome.So I put the disk in my PC.. And again I set the modem correctly by following CD's instructions..Then the internet started to work again..Now today also when I opened the internet the same manner it shows a message.. set the modem again..So my question is why is this happening ??And yea also the Wi-Fi's password setting has been also changing from WPA to Open..Is there a way to set this modem correctly.. without being setting the modem everytime.
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Apr 5, 2012
I would like to know on how can i setup my cisco 877 router at my small office. Here are the things that i need to do:
1. I need enter the internet static ip address 61.10.xx.xx/subnet mask/gateway/dns provided by my ISP.
2. I need to configure the cisco router DHCP so that the 4 computers can obtain an IP automatically. Howow can i accomplish this setup.
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Apr 8, 2011
I am using using 2 broadband with tp-link dual wan router 10 pc using the broadband.does any one know about the router who controls bandwith there is option available in Tp-Link Dual wan router but its not working...is there any router which automatically takes bandwith and allow as per my details.
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Aug 10, 2012
I have an iBoss router at home that is secured. Occasionally, I'll noticed, I am no longer connected to the iBoss router and connected to an unsecured router named linksys?
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May 31, 2012
I purchased the DIR-615 last week, and have experienced intermittent loss of internet connectivity, and automatic rebooting numerous times a day. A solid connection is up for 90% of the time; but you never know when connection will be lost. When connection is lost it automatically comes back after about 5 minutes with the router rebooting itself. I though I would ask for assistance here prior to taking it back to Fry's. I was previously using a 6 year old Linksys, and had no problems for years until it recently decided to die.
Specific information:
DIR 615
Hardware Version I1
Firmware Version 9.01NA (I updated from 9.0)
[Code].....
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May 7, 2012
I recently got an E1000 router brand new V2.1 from a friend. Seems to run great, only problem both my Mac Book Pros (running snow leopard and lion) will not reconnect automatically to the wifi after waking up from sleep.
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Mar 2, 2013
Region : Sweden
Model : TL-WR740N
Hardware Version : V4.20.0
I have a TL-WR740N. If router is on and I turn on my laptop it will not automatically connect to the router. I must turn off the router and then turn on again to get connection to the Laptop. I think I have missed something in configuration of the Laptop.
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