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  1. Home>
  2. Help>
  3. Cisco Router Errors
PRTG Logo

 

There are a lot of Cisco router
errors out there. Way too many, right?

You as sysadmin know that for sure – service configuration errors, interface overrun errors, ROMmon mode problems. All these Cisco router errors sometimes drives you crazy.

Here's a list of the most common errors around Cisco routers and the proven solution to them:

  • Cisco router error: Error opening tftp
  • Cisco router error: interface overrun
  • Cisco router error: rommon mode problem
  • Cisco router error: Error Code 448 or Dialog (%1) aborted and was deleted

And you’ll find the solution to get rid of ALL Cisco router errors – forever: Test PRTG as your new monitoring tool and get started within minutes!

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Cisco router error

"Error opening tftp"
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Quick fix

The service configuration error „%Error opening tftp” occurs during initial hardware bootup through Cisco IOS software.

To solve the problem, issue the no service config global command:

Router#config terminal
Enter configuration commands, one per line:
Router(config)#no service config
Router(config)#exit
Router#copy running-config startup-config

The error message will not come up again at the next bootup of the Cisco router.

Best solution:

  • https://www.cisco.com/c/en/us/support/docs/routers/10000-series-routers/49683-serviceconfig-error-msgs.html.
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Proper fix

Switch to PRTG: PRTG offers fully integrated Cisco network monitoring to monitor Cisco routers, switches, and ports.

Find out how Cisco Monitoring can help you get rid of those errors

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Cisco router error

"interface overrun"
icon time

Quick fix

ASA interface overrun errors occur when a packet is received on the network interface, but cannot be stored due to a lack of capacity. The error can be caused both on a software and on a hardware level.

  1. Check if the Adaptive Security Appliance (ASA) experiences CPU hogs that cause the problem. Try to reduce CPU hogs.
  2. Determine if the ASA is oversubscribed due to the traffic profile of the interface traffic rates.
  3. Check if the problem is caused by intermittent traffic bursts. If this is the case, implement flow control to the ASA interface.

Best solution:

  • https://www.cisco.com/c/en/us/support/docs/security/asa-5500-x-series-next-generation-firewalls/115985-asa-overrun-product-tech-note-00.html#
Icon Check

Proper fix

Switch to PRTG: PRTG offers fully integrated Cisco network monitoring to monitor Cisco routers, switches, and ports.

Find out how Cisco Monitoring can help you get rid of those errors

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Cisco router error

"rommon mode problem"
Icon Time

Quick fix

There are several problems that can cause the Cisco router to get stuck in ROMmon mode. Most commonly, the error is caused during the boot process.

  1. If your router gets stuck in ROMmon mode during the boot process, examine the value of the configuration register by entering the confreg command.
  2. Change the value of the configuration register as shown below to stop the router to go into the ROMmon mode after reloading.
Open code
   rommon 2 > confreg
      Configuration Summary
  enabled are:  
  load rom after netboot fails
  console baud: 9600
  boot: the ROM Monitor
  do you wish to change the configuration? y/n [n]: y
  enable "diagnostic mode"? y/n [n]:  
  enable "use net in IP bcast address"? y/n [n]:  
  disable "load rom after netboot fails"? y/n [n]:  
  enable "use all zero broadcast"? y/n [n]:  
  enable "break/abort has effect"? y/n [n]:  
  enable "ignore system config info"? y/n [n]:  
  change console baud rate? y/n [n]:  
  change the boot characteristics? y/n [n]: y
  enter to boot:
   0 = ROM Monitor
   1 = the boot helper image
   2-15 = boot system
      [0]: 2
      Configuration Summary
  enabled are:
  load rom after netboot fails
  console baud: 9600
  boot: image specified by the boot system commands
      or default to: cisco2-C2600
  do you wish to change the configuration? y/n [n]: n
  You must reset or power cycle for new config to take effect.
  rommon 3> reset

Best solution:

  • https://www.routerfreak.com/router-stuck-rommon-mode/
Icon Check

Proper fix

Switch to PRTG: PRTG offers fully integrated Cisco network monitoring to monitor Cisco routers, switches, and ports.

Find out how Cisco Monitoring can help you get rid of those errors

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Cisco router error

"Error Code 448" or "Dialog (%1) aborted and was deleted"
Icon Time

Quick fix

If you encounter Cisco router error code 448, you receive the message “Dialog (%1) aborted and was deleted”. Error 448 is not a routing error, but occurs when the customer leg disconnected for the call at the routing client.

  1. Go to the program menu and select ICM Admin Workstation > Schema Help > Contents > ICM Master Help Option > Help Option.
  2. Select your router’s name and click on ICM error. Wait for the error popup window to appear. Scroll through the error message.
  3. Apply patches through SR2 or hotfix 162 for ICM 4.6.2 to adjust the way error code 448 is used for abandoning calls. Check your router to make sure that the problem is solved.
Icon Check

Proper fix

Switch to PRTG: PRTG offers fully integrated Cisco network monitoring to monitor Cisco routers, switches, and ports.

Find out how Cisco Monitoring can help you get rid of those errors

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With PRTG you'll never have to deal with Cisco router errors again. Ever.

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PRTG monitors your Cisco devices out of the box

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PRTG features special sensors designed just for Cisco devices

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PRTG integrates technologies such as SNMP and NetFlow

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PRTG increases the security of your network and the quality of your service

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