Cyclone V GT development board ethernet

I am trying to use Ethernet in a project. I am using an open core listed below,

https://opencores.org/project/ethmac/overview

I have used this core on DE2-115 board, but now when I am using the same core on Cyclone V GT development board, I am facing an issue. As following pins are not connected to any pin Cyclone V board.

ENET_LINK100

ENET_RX_ERR

ENET_RX_COL

ENET_CRS

ENET_TX_CLK

ENET_TX_ER

ENET_CLK25

Kindly help If some has used this core.

Thank you.