It is due to the reason that when pause frame with broadcast destination address is received, broadcast frame signal which is used by ifInBroadcastPkts counter to identify a received broadcast frame is asserted.
The following patch provides a solution to deassert broadcast frame signal when pause frame is received.
Please download the appropriate Quartus® II software version 10.0SP1 patch 1.210 from the following links:
You must either have previously installed the Quartus II 10.0 SP1 software or must install the Quartus II 10.0 SP1 software before installing this patch. Otherwise, the patch will not be installed correctly and the Quartus II software will not run properly.
After you install the patch please regenerate your Triple Speed Ethernet MegaCore® before you compile your design.