Hello Scott,
what supervisor and MSFC are you using ?
sup1/MSFC,
sup2/MSFC2
for sup1/MSFc
http://www.cisco.com/en/US/products/hw/switches/ps700/products_tech_note09186a008015504b.shtml
for sup2/MSFC2
on sup1/MSFC1 MLS is flow based traffic driven on sup2/MSFC2 MLS is CEF based
http://www.cisco.com/en/US/tech/tk827/tk831/technologies_tech_note09186a0080094b27.shtml#broken
But the following doc can be a better fit for your needs
http://www.cisco.com/en/US/products/hw/switches/ps708/products_tech_note09186a00804916e0.shtml
Hope to help
Giuseppe
if you are using EIGRP:
CSCdt54036 Bug Details
Packet loss with default network learned via EIGRP in MSFC2
Cat6509 with MSFC2 running 12.1.5b(E7) and using EIGRP as the routing protocol
has been observed to cause packet loss when using the default network for the
return path of the packets. Using a default route instead of default network
will not have
@any packet loss.
This issue is resolved.
The bug CSCdt65160 is a clone of this one.
In order to fix this bug the CatOS image on the supervisor needs to be
upgraded to 6.1(3) or above.