This depends on the NM that is used.
For the 2611, the NM-2W (Supports 8 Mbps aggregate across
4 ports) is the only WIC that can support
the MFT and 2 channel groups per WIC. The
2611 switching speed is 15k packets per
second fast switched. If the 2611
can handle this, it likely won't be able
to handle much more on the box.