Altera DE2-115 User Manual page 58

You will need to perform a hardware reset after any change for enabling new settings.
and Table 4-22 describe the working mode settings for ENET0 PHY (U8) and ENET1 PHY (U9)
respectively.
In addition, it is dynamically configurable to support 10Mbps, 100Mbps (Fast Ethernet) or
1000Mbps (Gigabit Ethernet) operation using standard Cat 5e UTP cabling. The associated pin
assignments are listed in
its datasheet and application notes, which are available on the manufacturer‟s website.
Table 4-21 Jumper Settings for Working Mode of ENET0 (U8)
JP1 Jumper Settings
Short Pins 1 and 2
Short Pins 2 and 3
Table 4-23. For detailed information on how to use the 88E1111 refers to
Figure 4-27 Connections between FPGA and Ethernet
Figure 4-28 Working mode setup header for Ethernet PHY
ENET0 PHY Working Mode
RGMII Mode
MII Mode
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Table 4-21