FVS336Gv2 - No stable internet connection

The web interface for these units can be slow, but that doesn't mean that the router is running slow--it's just the way it is.  I've gotten used to it now because the router performance more than makes up for it.

If you've made static routes and messed around with any of the configuration settings on the netgear--stop.  That's where something might have been messed up.  Undo everything to bring it back to factory default or just factory default it.

Once you have done the factory default, connect it to the dsl router and see what wan ip address you are getting.  The dsl unit sounds like it has a router built-in, so you will probably be getting a 192.168.x.x. address.  The important thing here is that your netgear lan cannot be the same 192.168.x.  You will need to make sure the lan is something different.

Start with this and then reply back with any issues.