Description

When the XAUI v6.1 Core example design files are generated in Core Generator, CHAN_BOND_LIMIT is currently set to 31 on all GT11s. This should be reduced to 7 to meet requirements. The current setting of 31 is outside the 802.3ae spec. The setting of 31 also means that the CLK_COR_MIN_LAT and MAX_LAT settings are outside the parameters set in the GT11 User Guide.

Solution

Changing to 7 will resolve this problem. This will involve changing the "transceivers.v/vhd" file in the example design.  

In the verilog file, change the line "synthesis attribute CHAN_BOND_LIMIT of GT11" from "31" to "7", and the same for the defparams (there are 4 instances of each of these). 

In the vhdl file, change the CHAN_BOND_LIMIT generic from 31 to 7 (there are 4 instances of this as well).