@Ebarlev There are two options for using VR600 in your case: 1. You could try to set VR600 as an AP (using one of its LAN ports for uplink to HALNY) thus avoiding double NAT in your LAN - check this...

@FreakyMood TD-W8961N can only make a WDS connection with another TD-W8961N - check this guide.

@GaryBurc To avoid a double NAT in yor network and use the AX72 64 IP address reservation limit you have to set VR2100 in bridge mode and use AX72 as a router - check this story. In this case you...

@arphillips You can browse the TR-69 related page for more detailed information.

@Soulzito Check this reply concerning your question.

@Kestrel4 The barrel outer / inner diameters are most probably 5.5 mm x 2.1 mm.