There are some situations that the router may be inaccessible, sometimes the router is only busy with other tasks, or the WUI service is stopped accidentally. However, in some cases, the router does not work properly due to the firmware on the router is damaged, we will need to install the firmware to the router again to get it back to work.
Here are some actions we can perform to do the basic situation check:
1. Do the router LED lights flash as normal (ACT light flash periodically)?
a. Yes → Go to Step 2
b. No → Try Method B
2. Ping the LAN IP of your router, if you
a. CAN get the reply → Go to Step 3
b. CAN’T get the reply → Try Method B
3. Telnet to the router (LAN IP), if you can establish the session
a. successfully → Try to reboot the router manually, if the situation not improve, try Method A
b. failed → Try Method B
If the router is inaccessible, but the LAN clients can still access the internet, and the router is still handling the other tasks and providing service, this may cause by failure of the HTTP server of the router. We can try to install the firmware file via FTP, please refer to How to upload firmware to my Vigor Route via FTP? We suggest to use FTP method first because we can upload .all file by this method, and will keep all your configuration after re-flash the firmware file. Besides, if your router is locked in the server room or rack, this method does not require you to get to the router physically.
However, if this method does not get your router back, please try the Method B.
If the router is inaccessible, and its LED lit in a strange pattern, for instance, the ACT LED is constantly on, the LED are lightning, or it keeps cycling through all the LED, this is probably an indication that the firmware on the router is damaged. This might happened after a failed firmware upgrade; however, router can be restored by re-flash firmware via TFTP.
To restore the router to working state, please re-flash the firmware via TFTP mode (See How to upload firmware to my Vigor Router via TFTP? for the instructions.) Remember it need to upload .rst file for recovering the router, and please note that the .rst file will reset your router to factory default.
After the firmware re-flash and router reboots, if the ACT LED blinks approximately once per second, this shows that the router has returned to normal state, and it will accessible again on 192.168.1.1.
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