Timeline for Ethernet PHY MAC Address - DHCP Request not responding
Current License: CC BY-SA 4.0
9 events
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| Jul 14, 2022 at 13:10 | comment | added | Chris Knudsen | Because you started another question (electronics.stackexchange.com/questions/627355/…) Please consider reverting this question back to its original form, and marking it as answered. Changing the nature of an existing question makes this forum les useful for future people searching for answers. | |
| Jul 14, 2022 at 12:36 | comment | added | Chris Knudsen | @Newbie Use Wireshark ( wireshark.org )on your dhcp server to monitor transactions on your network segment. Your LAN 8700 does not care about, nor does anything with, dhcp requests. It just tickles the transformer, and provides a bit of intelligence to the interface. DHCP is handled by an external server on your network (that you set up). You can tell if the 8700 is working with Wireshark. You can tell if your uC is working with your debugger. If I were you, I'd start simple, and confirm the system works with a fixed IP on your uC, then try enabling DHCP once it's all good. | |
| Jul 14, 2022 at 5:55 | comment | added | user220456 | Thank you, I have checked. Below is my observation : When the Renesas send the DHCP request, I have the feeling (not 100% sure, I will try to find it out) that no response comes from the LAN8700. Do you have a good hint how to find it out (I'm trying to measure it with an oscilloscope, but decoding could be a problem..)? Will add this in the above question under the edit section. | |
| Jul 13, 2022 at 23:15 | comment | added | jaskij | @Kubahasn'tforgottenMonica why bother, if you can just set up locally administered ones? | |
| Jul 13, 2022 at 19:09 | history | edited | Chris Knudsen | CC BY-SA 4.0 |
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| Jul 13, 2022 at 18:28 | comment | added | Kuba hasn't forgotten Monica | Personally, if I need some MACs for projects, I go to a thrift store and buy whatever cheap stuff has ethernet ports on it. $2.50 consumer cable modems/routers are great – you get two MACs at least. One for the Ethernet side, another for the cable side. | |
| Jul 13, 2022 at 18:27 | comment | added | Kuba hasn't forgotten Monica | I had a buddy who did electronics as a hobby and worked at an electronics recycler. He had a side passion of harvesting MAC addresses from equipment that was going to scrap. All the equipment was made irrevocably non-functional during recycling so the MACs truly were “freed”. I don’t know what he did with the list – it was many thousands MACs long. He had a little PIC+ENC battery powered dongle to plug into a port, power the device up, and spit out any source MACs on the little 2-line LCD. | |
| Jul 13, 2022 at 15:56 | history | edited | Chris Knudsen | CC BY-SA 4.0 |
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| Jul 13, 2022 at 14:38 | history | answered | Chris Knudsen | CC BY-SA 4.0 |