@d0ugmac1 Thanks for your reply.

You are right. I do have GPON/FTTH as my primary WAN.

Also my secondary WAN is also a GPON/FTTH which I have set as a Dynamic IP.

Yes, the ER605 does show me the status of the link-up/down.

I have tried using open DNS in the ER605 WAN settings without any result for my problem.

Please guide.

Best Regards

Confluence wrote

My ER605 does NOT  activate the backup link.

Tried Config 1 : WAN configured in PPPoE mode by putting the ONT in bridge mode. WAN/LAN1 configured in Dynamic IP. Failover for PRIMARY WAN is WAN/LAN1. When the primary WAN goes down the router does not activate WAN/LAN1. Load balancing enabled in Transmission.

 

Tried Config 2 : WAN configured in Dynamic IP mode by putting the ONT in Route mode with PPPoE configured. WAN/LAN1 configured in Dynamic IP. Failover for PRIMARY WAN is WAN/LAN1. When the primary WAN goes down the router does not activate WAN/LAN1. Load balancing enabled in Transmission.

 

I feel this problem has been triggerred after the latest firmware upgrade mentioned below.

 

Requesting help.

 

Thanks in advance.

 

Best Regards

Rahul

  @Confluence  I have had exactly the same problem with an ER7206 router using PPPoE on WAN & Dynamic on WAN1.  The problem came down to loss of the PPPoE network signal going down but the modem continuing to output a sync signal that would indicate to the TP Link router that the WAN was still active.  Fixed the problem by using a keep alive test ping to 8.8.8.8  ...... no ping return & the WAN port then signals offline & changes to backup.

  @GaelForce 

Thanks.

You solutions seems to work. But how to I set a test alive ping in the router. I find no setting for this.

Pl. guide.

Best Regards

  @Confluence Try this on ER605 standalone.  Not visible under Omada controller

  @GaelForce Set to 'Manual & ping to something like 8.8.8.8 or similar for the PPPoE utilising WAN

EDIT