my very 1st router (with DDWRT FW mod), since I switched to the new ISP (RCS-RDS), had issues connecting via PPoE
the same router with default firmware connected properly, but I wanted DDWRT because of few features default firmware did not offer, so I switched it with a newer model
few months back, "the newer model" just stopped working - absolutely dead, no blinking LEDs .. nothing
so, I bought about the cheapest router I could get my hands on in such short time - the 605L
ps: if I don't reply back to this topic, all is well