>   This sounds reasonable.
Seconded.

>   Note, from what I understand, the same problem occurs for a number of other
> interface types: 
> 
>   1) GigE, which has to do 802.3 and not EthernetII if you want jumbo frames.
>   2) CiscoHDLC type stuff.
>   3) Ethernet over ATM types.
>   4) any of the above with VLANs.

5) PPPoE


Martin