[c-nsp] tag-switching on the 6500?

[lists at hojmark.org]

> While trying to turn up a 6509 (sup2/msfc2/pfc2) running
> 12.2(18)SXD3, I've found that while TDP appears to work, our 
> 7500s fail to switch some packets tagged by the 6509.

MPLS is only supported on the Sup2 when using OSMs. It's not supported for
LAN interfaces with the Sup2.

With Sup720-3B and 3BXL, the LAN interfaces are supported also.

-A