The xps_ll_temac has a parameter to select the PHY type (C_PHY_TYPE).
It also includes different PORT declarations. Which PORT is used depends upon the PHY type that was selected.
There is currently no DRC to ensure the PORTs and PHY type match. The issue will not be seen until the system attempts to build.
This issue will be fixed in the 'xps_ll_temac_v1_01_b' in the EDK 10.1 Service Pack 2 (sp2). It will be available at: