Cisco WAN :: 1841 - How To Do Configuration In ROMmon Mode
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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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 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 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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Sep 4, 2011
I have a little problem configuring NAT on router 1841, like this is the topology:
WAN (PUBLIC´S ADDRESS) fast0/0 fast0/0/0 PUBLIC´S ADDRESS INSIDE (192.168.1.0/24)
ROUTER ====== X.X.X.X/30============= ROUTER ======== Z.Z.Z.Z/29 ============ SW 3560==============
(ISP) .253 .254 CLIENT . 47 .48
The connection with ISP or Extra net is a metro Ethernet, so the isp gave two ip address to the client: WAN (/30)
LAN (/29) Which be the public addresses to be used by the client if you need to publish any server on the network (like WWW), so they do not have any device that will could do the nat, like an asa or linux server, so the router has to do the Nat, because the SW 3560 does not support this feature.
So... I did the following:
On router 1841:
inter fast 0/0
description WAN
no shut
[ code ]...
I create an interface Blackpool to simulate the LAN connection (192.168.1.0/24)
Inter loopb 0
ip address 192.168.1.254 255.255.255.0
ip nat inside
[ code ] ...
ON SWITCH:
interface vlan 448
description LAN-ME
ip address Z.Z.Z.48 255.255.255.248
no shut
ip route 0.0.0.0 0.0.0.0 Z.Z.Z.47
But if i try to do ping from the ip address 192.168.1.0/24 to any server´s internet the ping fails, but if i do the ping from v LAN 228 the ping is success. I will think that route map could solve the problem.
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Apr 8, 2011
I have 2 cisco 1841 routers the one is connected to my local network and the other is the stub router and it only has 2 fastethernet interfaces. fao/1 connected to the local network and fa0/0 connected to the internet and to the other router. How can i configure NAT on the fa0/0 which is sharing the internet and local network
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Dec 12, 2011
I am configuring a 1841 router for use in small out office. I will use the s0/0/0 for main WAN T1 connection. I then wanted to use the ATM0/1/0 WIC-1-ADSL card as a failover. I am using weighted static routes for failover. Fe0/0 is LAN interface. When I go into SDM and look at the ATM interface it says this configuration is unsupported?
1. Can't I just get a DSL modem and connect it to fe0/1 and not use ATM WIC and use below for failover?
2. If I have to use ATM WIC what needs to be configured for it to work with Att aDSL?
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Oct 8, 2012
I'm having 1841 Router, its configuration is not getting safed. If I reboot the router all my running-config is like default. But when I check my sh startup all the configuration which I did is displayed. Checked the config-registery too and its 0x2142 changed too 0x2102 still the same problem, when reloading the router all the running config is disappeared.
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Feb 23, 2013
my problem in configuring a cisco 1841 as VPN server using SDM, everytime i press Lunch Easy VPN Wizard botton, there were no response at all. my IOS is:
Cisco IOS Software, 1841 Software (C1841-ADVIPSERVICESK9-M), Version 12.4(15)T15, RELEASE SOFTWARE (fc3)
ROM: System Bootstrap, Version 12.4(13r)T, RELEASE SOFTWARE (fc1)
System image file is "flash:c1841-advipservicesk9-mz.124-15.T15.bin
by the way I took this IOS to other router with the same model(CISCO1841).
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Jun 20, 2012
I'm trying to get a PPPoE config working on an 1841. Running c1841-advsecurityk9-mz.124-3i.bin . I tried c1841-advsecurityk9-mz.151-4.M4.bin but it has even less protocol options.
I used a walkthrough but it suggests the following fragment which doesn't work because there is no "protocol ppoe" command available on my system. Perhaps there is a simpler way to do this? I tried c1841-broadband-mz.151-4.M4.bin but it doesn't seem to have ssh available.
vpdn enable
vpdn-group 1
request-dialin
protocol pppoe
exit
[Code]...
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Dec 15, 2010
I have the following very simple policy configured on a Cisco 1841.
policy-map Shape-2Mb class class-default shape average 2000000 interface FastEthernet0/1[code]....
I'd just like some clarification on the best ways to monitor this. Looking at the 'sh policy-map int fa0/1' i get this:
FastEthernet0/1 Service-policy output: Shape-2Mb Class-map: class-default (match-any) [code]...
some of the sections don't make much sense to me. What is the output of that command.
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Nov 27, 2011
I have a Cisco 1841 router with an HWIC-ADSL module installed. My ADSL connection is PPPoA with a dialer interface and I have been provided 6 ip's from my provider to use on this service. Previously I have connected Fa0/0 on the 1841 straight onto my network and used NAT and ACL's on the 1841, I would now like to change this and have Fa0/0 connected to a Palo Alto firewall and use the Palo Alto to provide NAT, Firewall & site to site VPN functions. What config would I require on the 1841 to allow me to use one of my ISP IP addresses on the Palo Alto to allow it to be a VPN endpoint? Do I need to configure the 1841 in bridge mode?
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Aug 5, 2012
I am trying to configure a Cisco 1841 to allow the users to access the internet. This is my first step with ppp. All the rest of the configuration is ok but I don't know how to setup the interfaces Dialer0 and ATM0/0/0.
Need very basic configuration that I can analyze and use on my device?
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Jan 24, 2013
I have a Cisco 1841 Router with ADVANCE IPSERVICE IOS .The said router does not safe config, even after saving the config? As soon as the power cycled all the config will be lost? what can be done to correct this ?
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Jul 17, 2011
In an IPSec port to DUT scenario, with Mode-Config set so as the DUT sends the IP address to the port, I get to a situation in which the DUT continuously enter the "Need config/address" state for the port, even if the port sends its ACK packet to every set IP address from the DUT.
The DUT is a Cisco 6500 Version 12.2 (33) SXI3, having Mode-Configuration configured to provide clients with IP addresses from a local pool. I enabled the "debug crypto isakmp" on Cisco, and below is an extract form the log file:
5d23h: ISAKMP:(80653):Need config/address /* My comments here: This is the first Address configuration message from Cisco to port */
5d23h: ISAKMP: set new node 1768971286 to CONF_ADDR
5d23h: ISAKMP: Sending private address: 94.94.0.164
5d23h: ISAKMP:(80653): initiating peer config to 171.159.1.113. ID = 1768971286
5d23h: ISAKMP:(80653): sending packet to 171.159.1.113 my_port 500 peer_port 500 (R) CONF_ADDR
5d23h: ISAKMP:(80653):Input = IKE_MESG_INTERNAL, IKE_PHASE1_COMPLETE
5d23h: ISAKMP:(80653):Old State = IKE_P1_COMPLETE New State = IKE_CONFIG_MODE_SET_SENT
above debug messages that Cisco produces I can not realize why Cisco resends the IP adderss configuration message for remote peer. Any other methods to use so as to get the reason behind this behavior? Or any explanation to the above behavior?
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May 1, 2012
For the establishment of a WiFi Hot Spot with 5 Cisco 1242AG and 5 antenna AIR-ANT1728, I want to know what the config is the most suitable.
- One antenna in root mode and the other 4 in repeater mode
- Or 5 antennas in root mode
Between each terminal distance is about 100 meters outside?
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Oct 4, 2011
I have followed these guides for setting and have enabled this feature. Works great too. The only issue I have is the last step to in the deployment guide is to disable the controller based IDS signatures. I would like to be able to do this via a template in WCS. I have found where to do this via WCS controller webpage and also the controlller itself, but I'm looking for a way to push this change all at once. I have 26 wlcs so it would be nice to just do it once and apply to all of them. [URL]
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Dec 11, 2011
How do you set up a linksys routers internet configuration type to public/bridge mode? my model is WRT45g
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Sep 14, 2011
I just received a Cisco Aironet 1130 AG wi-fi router to configure and when I entered the router through console, I am not able to get into config mode. It says:
AP588d.09a7.93e4#conf t
^
% Invalid input detected at '^' marker.
Also,
AP588d.09a7.93e4#sh start
startup-config is not present
Also, this is what I see in my flash:
AP588d.09a7.93e4#sh flash:
Directory of flash:/
3 -rwx 217 Mar 01 2002 00:07:10 +00:00 env_vars
4 drwx 128 Jan 01 1970 00:02:03 +00:00 c1130-rcvk9w8-mx.bin
I need to configure this device and set up for wi-fi access in my organisation network.
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