Draytek Vigor3910 Series, User Manual

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Vigor3910 Series User’s Guide 442
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If WAN connection cannot be up, check if the LEDs (according to the LED explanations listed
on section
I-1 ) are correct or not. If the LEDs are off, please:

Change the Physical Type from Auto negotiation to other values (e.g., 100M full duplex).

Next, change the physical type of modem (e.g., DSL/FTTX(GPON)/Cable modem) offered
by ISP with the same value configured in Vigor router. Check if the LEDs on Vigor router
are on or not.

If not, please install an additional switch for connecting both Vigor router and the modem
offered by ISP. Then, check if the LEDs on Vigor router are on or not.

If the problem of LEDs cannot be solved by the above measures, please contact with the
nearest reseller, or send an e-mail to DrayTek FAE for technical support.

Check if the settings offered by ISP are configured well or not.
When the LEDs are on and correct, yet the WAN connection still cannot be up, please:

Open WAN >> Internet Access page and then check whether the ISP settings are set
correctly. Click Details Page of WAN1~WAN8 to review the settings that you configured
previously.