On 12 Dec 2001, at 19:09, Heidrun Schröder wrote:

> Hi there Listers,
>
> got DSL last weekend and can't use it like planned with my LAN of
> 3 computers through a router. Being directly connected to the DSL
> modem I can use it with that computer now at least. The router was
> set up following the instructions but maybe I missed something
> after all. Does anyone out there have an idea what might be the
> obvious mistake that "everyone" does!? I mean, I bought the router
> from the Telekom and was told I could go online through it with up
> to 32 computers licensed. So it must be possible even though I
> have been told by a friend of my son, that he knows nobody who
> managed. I am sure you list gurus manage and know how to do it. I
> am wondering if maybe the missing flat-rate for unlimited access
> could cause this problem? I had ordered it altogether but they
> just forgot it, so I will now have to wait for another month or so
> until I can get that.
>
> Maybe if the question is too general and you would need a lot of
> information about my system and LAN, there is somewhere out there a
> tutorial about how to do it and you could tell me where to look
> for it!?
>
> TIA
> Heidrun Schroeder

  I've seen several recent reports of "PPPoE works directly
connected, but not through a router".

  Ethernet LANs are typically used with an MTU (Maximum Transmission
Unit) size of 1500 bytes.  PPPoE needs about 10 bytes of overhead;
when this is added by the router, the packets are too big to be
accepted by the DSL service.
  Exactly where and how to set the MTU varies from one Windows OS to
the next, but try knocking it down to about 1480, and it will
probably start working if this is the issue.

David Gillett

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