[c-nsp] 6500/Sup720-3BXL FIB TCAM tuning

[Pete Templin]

I had a maintenance window this evening to upgrade a router and attempt 
to tune the FIB TCAM to be ready for continued IPv4 growth beyond the 
512k default on this platform.  I'd apply the commands to tune the FIB 
TCAM, reload, and upon reboot I'd have errors about a FIB Protocol 
Allocation mismatch.  I'd tweak my numbers a bit (random guesses as to 
why I was tripping this error), and re-check status, where I'd see this:

router#sh mls cef max

Reload scheduled in 1 minute and 2 seconds
Reload reason: FIB Protocol Allocation mismatchFIB TCAM maximum routes :
=======================
Current :-
-------
  IPv4 + MPLS         - 512k (default)
  IPv6 + IP Multicast - 256k (default)

User configured :-
---------------
  IPv4                - 768k
  MPLS                - 64k
  IPv6                - 48k
  IP multicast        - 48k

Upon reboot :-
-----------
  IPv4                - 768k
  MPLS                - 64k
  IPv6                - 48k
  IP multicast        - 48k

router#

Whether I made my numbers add up to 1024k (knowing that I have to 
double-count the numbers for v6 and multicast) or below 1024k, it'd 
continue complaining and forcing reboots until I punted and simply 
removed all of the related recarve commands.

Has anyone successfully tuned this, and if so could you share the 
software version and tunings used? We're running 
advipservicesk9_wan-mz.122-33.SXJ2 if that matters.

Thanks,

Pete