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NetVanta 3120 and 3130 Reset Button and Bootstrap Operations

NetVanta 3120 and 3130 Reset Button and Bootstrap Operations

The NetVanta 3100 Series routers utilize a reset button instead of a console port like other AOS units. This document covers resetting the 3100 series unit in certain situations as well as bootstrap operation in the absence of the console port.

Sections included in this document

Hardware and Software Requirements

Reset Button Operation

Bootstrap Operation


Useful Links

Hardware and Software Requirements

The information included in this document only applies to the NetVanta 3120 and 3130 units. Note that though the reset button and bootstrap mode are present on every unit, the operation of those may slightly change depending on the current firmware version on the unit. The individual sections below indicate any firmware version requirements and differences.

For more information about AOS firmware versions and version format, please see .

Reset Button Opertaion

The reset button resides in a "pin-hole" on the back of the 3120/3130 as shown below (Note that the picture below is a NetVanta 3130 with DBU. The port density on your unit may be slightly different but the reset button will still be in the same place):


This button should be pushed using a paperclip or something of similar girth. If attempting to hold the button down does not seem to be initiating any of the below steps, make sure the button is being held down with constant pressure. The button is very sensitive and a slight release of pressure can cause it to depress.

If you desire to reset the NetVanta 3120/3130 back to the factory default configuration, the reset button should be pressed and held for 30 seconds while the unit is up and running. When the factory default operation has been initiated, the lights on the front of the unit will light in a left-to-right pattern. The unit will then reboot itself and apply the default configuration before finishing the boot sequence. Once you have verified the factory default operation has been initiated by observing the light sequence from above, do not remove power from the unit or press the reset button again. Interrupting the factory default sequence could cause flash corruption.

In certain situations, a user may not be able to access the unit, but does not desire to reset the unit's configuration. An example would be incorrect firewall rules restricting access, or the loss of knowledge of the IP address currently on the unit. In this case, the reset button can be used to regain access to the unit without erasing the current configuration. To initiate this, press and hold the reset button for 5 seconds while the unit is fully booted. This will remove the AOS Firewall Access Policies off any of the unit's interfaces and will reset the IP address of VLAN 1 on the unit to  The unit can then be accessed using switchport 1 provided an address in this same subnet is applied to the connecting PC (for example,

With the release of AOS version 18.2, the reset button can be used to manually generate an Exception Report. An Exception Report is a "snapshot" of the AOS unit's current memory and processor operations that is normally generated if an AOS unit must reboot to restore a critical process. In certain situations, like a network outage requiring the reboot of the router or during troubleshooting of a possible lockup condition, an exception report can be a critical tool for ADTRAN Technical Support to help diagnose a problem. However, if the router does not reboot itself during a lockup condition, an exception report will not be generated. In these cases, the reset button should be used to create an exception report by pressing and holding the button for 10 seconds. Upon 10 seconds, the unit will automatically reboot itself. Especially during situations where the router must be rebooted to restore network access, the reset button should be used so that an Exception Report will be generated and can be provided to ADTRAN Technical Support.

If you need help retrieving the exception report from the flash of the unit to provide to ADTRAN Technical Support, please see .

Bootstrap is a recovery and utility mode that can be entered before an AOS unit begins to boot the current operating AOS version. There are certain recovery operations that can only be initiated in Bootstrap Mode.

To access Bootstrap Mode, power the unit off first using the power switch on the back panel of the unit. Before toggling the switch to the on position, you must be ready to push the reset button, but also in a position where you can properly observe the STAT light on the front panel of the unit. Once this has been situated, toggle the power switch back to the on position.

Shortly after the unit powers on, the STAT light will start flashing green for 5 seconds. During this period, press the reset button and let go (do not hold the button down). You should see the STAT light change to a solid amber. This means the unit is now in Bootstrap. If the STAT light does not turn amber and you see the lights flash in the normal boot sequence pattern, Bootstrap Mode was not entered properly. Do not turn off the unit again to reattempt entering Bootstrap Mode until the router has fully booted (STAT light is solid green and all ports with active connections show solid green or amber). Failure to heed this warning may result in corruption of a unit's flash or unit failure.

Bootstrap Operation

The following sections cover NetVanta 3120/3130 operation in Bootstrap Mode that differs from a typical AOS unit only. Before continuing, it is important to note that telnet has been built into bootstrap operation for these units to provide a method to access Bootstrap Mode. Once the unit is in Bootstrap, the unit can be accessed using the IP address, provided the connecting PC is in the same /24 subnet (for example: and is connected to one of the four switchports on the rear panel.

If the access credentials have been lost, but you do not wish to factory default the configuration, the unit's passwords can be reset in Bootstrap Mode. Once you have entered Bootstrap mode using Initiating Bootstrap Mode, use the following commands to bypass the telnet and enable passwords:

bootstrap#bypass passwords


Once boot has been entered, you will lose access to the unit as it will initiate the boot sequence. Once the unit has fully booted, it can be accessed via telnet. Once connected, the unit will not prompt for a password. Similarly, accessing privileged mode will not require a password as well. Note that if you are using the local user database to authenticate telnet users, this step will have no effect. The configuration will either need to removed and recovered using the next section or defaulted using Resetting the Unit to a Factory Default Configuration.

This step will not reset any administration to the GUI. All of these credentials will still be located in the unit's configuration. Steps used to change these passwords once inside the unit are shown below. This must be done via command line:

To change the enable password, use the following command:

(config)#enable password <password>

To change or add a user to the local user database (for GUI or SSH access):

(config)#username <username> password <password>

To change the telnet password:

(config)#line telnet 0-4

(config-telnet0-4)#password <password>

  • Retrieving or Adding a Configuration

In certain instances, like when the flash has been reformatted when trying to recover a configuration from a unit for which you do not have the access credentials, recovering a configuration or adding a configuration to flash can help. To do this, first access Bootstrap Mode. Connect at Retrieving or adding a configuration will require that a TFTP server or a unit running a TFTP application be accessible on the network. If the TFTP server resides on a separate subnet, you will need to use the ip route <next-hop IP> command to add a default gateway.

bootstrap#ip route <next-hop ip>

To retrieve a configuration file from the flash of the unit, use the following command:

bootstrap#copy flash tftp

After pressing enter, the unit will ask for the TFTP server's IP address and the source and destination file name.

Address of remote host?

Source filename?

Destination filename?

Once you have input these parameters, the file transfer should initiate.

To add a file to the flash of the unit:

bootstrap#copy tftp flash

After pressing enter, the unit will ask for the TFTP server's IP address and the source and destination file name.

Address of remote host?

Source filename?

Destination filename?


If your NetVanta 3120/3130 unit does not seem to be booting up correctly, the STAT light is a very important troubleshooting tool. When the STAT light is green, this indicates normal operation. If the unit's STAT light is green, but you are having problems connecting to the unit or the unit does not seem to be working properly, consider resetting the unit without resetting the configuration using Accessing the Unit Without Resetting the Configuration.

If the STAT light shows amber, this means the unit is in bootstrap mode. Access the unit using any of the above sections and check to see if the unit needs a fresh firmware file or configuration file. In this case, reformatting the flash may be recommended as well using .

If the STAT light shows bright red, contact ADTRAN Technical Support as this may indicate a critical problem with the unit.

Useful Links

To view the hardware installation guide for the NetVanta 3120 and NetVanta 3130, please see .

To view the NetVanta 3100 Series Quick Start Guide, please see and .

Version history
Last update:
‎08-29-2013 01:35 AM
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