Hi,I am using Stratix 5 FPGA development kit. I am trying to check ethernet loopback test mentioned in the "an647_Single-Port Triple-Speed Ethernet_onboardPHY_RefGuide.pdf".Also we have downloaded the required RTL from the Altera website, compiled the design & downloaded the .sof file. We followed the instructions mentioned in the above document. But when i am configuring the PHY through config.tcl script, it shows PHY Link down and other messages shown below. % source config.tcl ============================================================================== Starting TSE MAC Configuration System Console ============================================================================== Info: Opened JTAG Master Service Info: Configure TSE MAC TSE MAC Rev = 0x00000d00 TSE MAC write Scratch = 0xaaaaaaaa TSE MAC read Scratch = 0xaaaaaaaa Command Config = 0x0000803b MAC Address 0 = 0x22334450 MAC Address 1 = 0x0000ee11 Frame Length = 0x000005ee Pause Quanta = 0x0000ffff RX Section Empty = 0x00001ff0 RX Section Full = 0x00000010 TX Section Empty = 0x00001ff0 TX Section Full = 0x00000010 RX Almost Empty = 0x00000008 RX Almost Full = 0x00000008 TX Almost Empty = 0x00000008 TX Almost Full = 0x00000003 MDIO Address 0 = 0x00000000 MDIO Address 1 = 0x00000000 Regiter Status = 0x00000000 TX IPG Length = 0x0000000c TX Command Status = 0x00000000 RX Command Status = 0x00000000 Info: Closed JTAG Master Service ============================================================================== Starting Marvell PHY Configuration System Console ============================================================================== Info: Opened JTAG Master Service Info: Configure On Board Ethernet PHY Chip Configure PHY. Set PHY SPEED to 1000Mbps Enable PHY Auto-Negotiation Enable PHY In Full Duplex Mode PHY read Control Register = 0x00001140 PHY read AN Advertisement Register = 0x00000001 Advertise PHY 1000BASE-T Full Duplex PHY read 1000BASE-T Control Register = 0x00000e00 Set PHY Synchronizing FIFO to maximum Set PHY HWCFG_MODE for SGMII to Copper Without Clock PHY read Extended PHY Specific Status Register = 0x00008484 phy link down! phy speed and duplex resolve failed! PHY operating in Half Duplex mode. PHY operating Speed 1000Mbps Info: Closed JTAG Master Service ============================================================================== Starting TSE PCS Configuration System Console ============================================================================== Info: Opened JTAG Master Service Info: Configure TSE PCS TSE PCS rev = 0x00000d00 TSE PCS write scratch = 0x0000aaaa TSE PCS read scratch = 0x0000aaaa TSE PCS if_mode = 0x0000000b TSE PCS control register = 0x00001140 Waiting Link Up..... Link is established! Partner Ability: copper link interface is down. Copper operating in Half Duplex mode. Copper operating Speed 10Mbps Info: Closed JTAG Master Service Please let me know if i am missing anything in proper configuration.Also find attached the design for your reference. Please also check from your side and let us know the feedback at the earliest possible time. Thanks in advance.