On Sat, Aug 02, 2003 at 11:27:55PM +0200, Quentin Garnier wrote:
> I've repeatedly ask for that change. The only answer I got was
> 'it's a flaw in the design of PPPoE'.

Well, the PPPoE standard (RFC 2516) is pretty explicit in this point.
Section 7 (LCP Considerations) says:

   The Maximum-Receive-Unit (MRU) option MUST NOT be negotiated to a
   larger size than 1492.  Since Ethernet has a maximum payload size of
   1500 octets, the PPPoE header is 6 octets and the PPP Protocol ID is
   2 octets, the PPP MTU MUST NOT be greater than 1492.

So it's a flaw in their PPPoE implementation to actually allow this large
frames, and it's a configuration flaw at their router to not return need-frag
ICMPs.

I have no problem for us accepting such broken input when a special option
is present, as long as this option is pretty clear documented to be 
depreciated and in violation of relevant standards.

I know how hard it is to find even semi-competent ISPs, it's a big problem
here in  germany too.

Martin