Recovering a cnWave60GHz device – Forgotten IP address / Forgotten password / Factory Reset
For situations with cnWave60GHz platforms when connectivity has been lost and so they cannot be managed, there is a Recovery Mode available that can restore control.
Recovery Mode requires a direct connection to the unit; only the wired/fibre connections are available for recovery.
A portable device (e.g. a laptop) is required to run a web browser to connect to the Recovery Web-GUI. Permission on this device needs to be at the admin level, it may be required to change/add an IP address. For the remainder of the procedure it is assumed that the device is a laptop.
A software upgrade (.img) file for the case where a unit is failing to boot to operational mode.
- Form an Ethernet connection to the unit. This may be via a switch.
- While in Recovery Mode, the unit will be at http://169.254.1.1, the laptop should be configured to an appropriate IP address, e.g. 169.254.1.100 ( the remainder of the procedure will assume that the laptop is at 169.254.1.100 ).
- If the unit is powered off, turn it on and wait (say) 30 seconds. If it is on, skip to next.
- Power off the unit briefly – i.e. turn it off and then back on again within 5 seconds.
- If the LEDs of the main Ethernet port can be observed, wait for the 2 LEDs to light red. If not, wait approx 10 seconds from power-on. This is the time taken to boot to Recovery Mode.
- In a web browser on the laptop, browse to http://169.254.1.1.
NOTE : This step may take several attempts; while in Recovery Mode, the unit will look at each interface in turn for a connecting browser. If the laptop makes the request for the webpage while the interface is inactive (because another is in focus instead), the request will fail. The solution is to retry at the browser if the page (below) does not begin to display in the few seconds after the request is made.
NOTE ALSO: Web browsers remember if a web server uses https and if will override a request to go to http at the same IP address. Since the Recovery page uses http, if the browser being used for recovery has ever successfully navigated to https://169.254.1.1 (e.g. the main Web GUI of the unit being recovered), then the browsing history should be deleted before attempting recovery. This will allowing the browser to connect directly to the http server.
SUGGESTION : make a bookmark of the link above for ease of entry.
The main Recovery Mode webpage looks like:
Figure 1: Recovery Mode Main webpage
- If there is no contact with a web browser, Recovery Mode will exit after 1 minute and will continue to a normal boot. Hence if Recovery Mode is desired but the webpage was not successfully requested and served, repeat the procedure from step 4.
- If a webpage is served from Recovery Mode, the user has 60 seconds to compete the recovery activities.
NOTE : Refreshing the webpage will restart the countdown timer.
NOTE : Since cnWave60GHz V3000s run the same Recovery Mode software as V5000s, references to “v5000” from a V3000 while in Recovery Mode is normal and should not be considered a problem. See the “Device Identification” section below for the definitive means of identifying a unit.
With reference to Figure 1:
The top-left corner of the webpage maintains a countdown to the time when a normal boot will be triggered if no more action is taken.
NOTE : Refreshing the webpage will restart the countdown timer.
The top-middle of the webpage displays the MAC address of the connected port of the unit being recovered. It is important to ensure that this is the expected unit. For confirmation, the MAC address is derived from the ESN of the unit which is printed on the label of the unit.
NOTE : While the main port will match the printed ESN, the Aux and SFP ports are at offsets of +0xF000 (hex) and +0x1E000 (2 x 0xF000) (hex) respectively.
Clicking this button will cause an immediate reboot to “Safe Boot”. This will boot the unit to the main operating system but with IP address 169.254.1.1. This will allow access to the main Web-GUI of the unit to correct any misconfiguration that has occurred. For example, a Factory Reset can then be triggered. Once the main operating system has finished booting (single green LED on main Ethernet port), on the Laptop browse to https://169.254.1.1/ Use “admin” as the username to log in, the password field is ignored in Recovery Mode “Safe Boot”.
Please Note: “Safe Boot” should not be used in conjunction with any other options in Recovery Mode. The image-handling options further down will take precedent over this
Triggers an immediate, normal boot. Removes the need to wait for the countdown to expire. If the user is finished in Recovery Mode (or has entered it by mistake), this provides a means of exiting immediately.
In the event that the desired software load (.img file) is not programmed onto the unit (or it has become corrupt and will not boot cleanly), the desired .img file can be uploaded to the unit via the TFTP protocol.
TFTP Server IP: When in Recovery Mode, this is most likely to be the laptop, but can be any other machine that is connected via Ethernet at the time and has a IP in the 169.254.0.0 network. This IP address must be set to that of the TFTP Server (169.254.1.100 for the Laptop).
TFTP filename: The name of the desired file (relative to the root directory of the TFTP server service). The value in this field is limited in length to 64 characters.
Upgrade-TFTP: Once the IP address and the filename have been entered, the upgrade (over TFTP) is triggered by clicking this button.
In the event that the desired software load (.img file) is not programmed onto the unit (or it has become corrupt and will not boot cleanly), the desired .img file can be uploaded to the unit via the HTTP protocol.
HTTP filename: If the desired software load .img file is on the Laptop, the user can browse to the .img file, to select it.
Upload and Program: Once the .img file has been selected, the upgrade (over HTTP) is triggered by clicking this button.
The unit should then remain powered while upgrading. The software-upgrade process normally takes 5-6 minutes, therefore 10 minutes should be allowed in order to include a safety margin before attempting to get to the Recovery Mode again
Software Version: Displays the platform and the version string of the current SW image
IP: Current IP address (fixed in Recovery Mode)
Netmask: Current Network mask(fixed in Recovery Mode)
Gateway: Current IP gateway address (fixed in Recovery Mode)
This section provides a list of software images currently available on the unit. The numbers of the buttons do not imply any order and is simply a means of identifying the buttons. If the Software Version in the “Device Information” section does not show the desired software version, but the desired software version is available in this list, the desired software version can be selected by clicking the corresponding button.
If the SW version is changed, the unit should then remain powered while upgrading. The software-upgrade process normally takes 5-6 minutes, therefore 10 minutes should be allowed in order to include a safety margin before attempting to get to the Recovery Mode again