Apologies if this has already been covered:
Our network now has two gateways to different ISPs - if I add a static route with gateway=x.x.x.x,y.y.y.y PPPoE clients will not pick up the other ISP's DNS addresses.
I couldn't find anything about this in the manual....
Trisc
It is usually better to run your own DNS servers. The purpose of DNS is to convert url names to ip addresses. The faster this is done, the faster the link to the address is made and the web page loads. If the DNS servers are on your network, this happens much faster. If one of the upstream servers goes down for some reason, then you experience significant delays.
I would suggest you try using the MT box as your DNS server. Under IP-DNS, enter the addresses of the two DNS boxes to use. Enable the option to allow remote requests. This way your clients only need one DNS address. They query the MT box and it querys the DNS servers. It returns the data and stores it in the cache. Try this and see if it solves your PPPOE connection problem.