Hello Thorsten,

documentation for PA-2FE-TX can be found here:

http://www.cisco.com/en/US/docs/interfaces_modules/port_adapters/install_upgrade/ethernet/pa-2fe_tx.fx_install_config/3474ovr.html#wp1030786

IEEE 802.3u

flow control 802.3x

I usually see flow control on gigabit ports.

flow control is not mentioned in the document above.

So or it is supported by default or it is not supported.

On switches you can see additional counters like output pause frames, input pause frames in sh interface typex/y

Hope to help

Giuseppe