Hi Daniel, I think you cannot do this. In my eyes VPN doesn't have backup definition on TL-ER604W.

Headquarter A and B connect via IPsec lan to lan. And A as a L2TP/PPTP client to lan server. A client connects to headquarter A( L2TP/PPTP server), and then it could access 192.168.10.0/24. And now...

Eh..What a weird phenomenon! Have you updated into FW180117? Because they published it on 2/9 and I just updated my device two days ago.

Bandwidth Control could limit speed of specific IP address. And it works for me

TL-R470T+ v6 has the option of WAN_ALL. There are some emulators on their website. That's very helpful. I post it for you....

well, your company share-it only could be reached from WAN1, right? Do you configure any other Load Balance feature, like Link Backup or any other? Screenshots of all Load Balance configuration will...