[mpls-linux-general] mpls labels in ethernet destination address : silly or interesting ?

[<sk...@en...>]

has anybody thought about embedding MPLS labels in ethernet headers,
instead of using a shim ? I thought about using last four bytes of
destination MAC address to carry MPLS labels. it would require
the receiver to work in promiscuous mode, or to set the multi/broad
cast bit of the destination MAC address, or to find some hack in
the NIC driver code to allow some kind of filtering.

would there be some interest in doing that way, or is there
some major pitfall I did not think of ?