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Altera_Forum's avatar
Altera_Forum
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15 years ago

Need help : implement Gigabit Ethernet

Hello, I'm new on this forum, so I hope that I'll be clear with my question. I'm currently working on Cyclone III FPGA Development Kit with the EP3C120F780C7N. For my project I have to etabli...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

The message you have in wireshark is the ARP request. The PC doesn't know your board's mac address yet, so it is broadcasting the Ethernet packet (but the destination MAC should be ff:ff:ff:ff:ff:ff, not zeroes...)

If you don't get any reply, it can be for two reasons:

[list][*]the TCP/IP stack doesn't receive the ARP request

[*]it receives it and send a reply, but this reply isn't received by the PC[/list]

It can have multiple causes, you could start by putting signaltap probes on the MII interface, and between the MAC and SGDMAs, to see if anything is going on over there.