# Troubleshoot Ethernet issues

You can use the following log types to log and debug issues related to
Ethernet.

| Log type | Purpose |
| --- | --- |
| `dmesg` | Debug issues related to the kernel driver |
| `tcpdump` | Verify the packet transfer |

To debug the issues that may occur during Ethernet bringup, do the
following:

1. Collect the `dmesg` logs to debug the issues related to kernel driver.

dmesg > /var/log/dmesg_logs.txt
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2. Collect the `tcpdump` logs to verify the packet transfer.

tcpdump -i any -s 0 -w /var/log/tcpdump.pcap
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3. Pull the file after the test.

scp  root@<device_ip_address>:/var/log/tcpdump.pcap .
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scp  root@<device_ip_address>:/var/log/dmesg_logs.txt .
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Note

When prompted for a password, enter `oelinux123` to authenticate the file transfer via SCP.
4. Collect the output from ethtool, ifconfig, netstat, and IP route
tables for debugging.

    For more information about these tools and their operations, see Perform Ethernet operations.

Last Published: Mar 18, 2026

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