Hi,
with a policy-map you could apply a policer like this:
7609(config-pmap-c)#police ?
WORD 8,000-10,000,000,000 Bits per second
aggregate Choose aggregate policer for current class
cir Committed information rate
flow police each flow
rate Specify police rate, PCR for hierarchical policies or SCR for
single-level ATM 4.0 policer policies
I don't think there is a platform limitation.
more infos:
http://www.cisco.com/univercd/cc/td/doc/product/core/cis7600/software/122sr/swcg/qos.htm#wp1328303
HTH
Andrea