Cisco GSR, Gig Ethernet config?

[John Haskins <jhaskins () commserv ucsb edu>]

Our configuration:  a GSR12008 with two interfaces, an OC12 ATM to the WAN
and a gig ethernet to the campus, serving as a border drain.

Does someone have real experience configuring this box with SFCs and
CSCs?  Is a full switch fabric (3 SFCs) and second CSC required or
desirable for the gig ethernet interface to work?  Could we expect to
support a second gig ethernet interface?  So many questions!

Thanks,
John Haskins
jhaskins () commserv ucsb edu
Communications Services
University of California
Santa Barbara