Hello, I have run into a specific issue with Ethernet connection on a Raspberry Pi 4. I so far have been unable to find the answer elsewhere, sorry if this has already been solved.
I have a Raspberry Pi 4 running the latest Raspberry Pi OS, 64 bit (as of Feb 01 2026). I am unable to receive an IP address or internet through the Ethernet port only. The WiFi works just fine. Here is the diagnosis so far:
Diagnosis Summary:
Raspberry Pi 4 tested on multiple routers and cables (both Ethernet and power).
Ethernet PHY negotiates correctly: link detected, 1 Gb/s full duplex (ethtool shows normal operation).
Interface reports UP, LOWER_UP, confirming physical layer is functional.
Device consistently fails to obtain an IP address (DHCP timeouts). Device also does not receive internet if requesting a static IP, though it does seem to get the requested IP address (not sure if the IP is usable even through local pings).
Issue persists after a fresh OS reinstall (Raspberry Pi OS, 64-bit).
Wi-Fi operates normally.
Failure is reproducible across different routers/networks, ruling out router, cable, or DHCP server issues.
I'm quite confused how to go about diagnosing this issue as there does not seem to be a clear culprit, at least to my level of understanding. I'm wondering how to go about solving this? Thank you in advance.
I have a Raspberry Pi 4 running the latest Raspberry Pi OS, 64 bit (as of Feb 01 2026). I am unable to receive an IP address or internet through the Ethernet port only. The WiFi works just fine. Here is the diagnosis so far:
Diagnosis Summary:
Raspberry Pi 4 tested on multiple routers and cables (both Ethernet and power).
Ethernet PHY negotiates correctly: link detected, 1 Gb/s full duplex (ethtool shows normal operation).
Interface reports UP, LOWER_UP, confirming physical layer is functional.
Device consistently fails to obtain an IP address (DHCP timeouts). Device also does not receive internet if requesting a static IP, though it does seem to get the requested IP address (not sure if the IP is usable even through local pings).
Issue persists after a fresh OS reinstall (Raspberry Pi OS, 64-bit).
Wi-Fi operates normally.
Failure is reproducible across different routers/networks, ruling out router, cable, or DHCP server issues.
I'm quite confused how to go about diagnosing this issue as there does not seem to be a clear culprit, at least to my level of understanding. I'm wondering how to go about solving this? Thank you in advance.
Statistics: Posted by LupinTheThird — Fri Feb 06, 2026 5:16 pm — Replies 1 — Views 37