Dual WAN with VLANs across 3 Netgear switches

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Intensifi wrote:

Note: For all switches I am currently using 802.1Q basic configurations. 

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With the basic 802.1q config, there is no way to configure a trunk, a connection handling more than one VLAN, on a single link. However, this is what you need to link up more than one switch.

I suggest using the Advanced 802.1q config, keep the primary VLAN easily workable for most connected devices, read keep the default VLAN 1 untagged for all ports and the trunk links. Add one additional VLAN, like VLAN 2, and mark trunk ports for tagged connections. For the ports you need as so called access ports where you want only this VLAN 2 (untagged ), and define thee ports as PVID 2 so frames coming in on these ports are assigned to the VLAN 2. For devices connecting the second router - and I tend to suggest not to use the WAN port - much more than the LAN port of the second VLAN.