# 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
        Copy to clipboard
2. Collect the `tcpdump` logs to verify the packet transfer.

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

scp  root@<device_ip_address>:/var/log/tcpdump.pcap .
        Copy to clipboard

scp  root@<device_ip_address>:/var/log/dmesg_logs.txt .
        Copy to clipboard

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](https://docs.qualcomm.com/doc/80-70030-26/topic/perform-ethernet-operations.html#perform-ethernet-operations).

Last Published: Jun 23, 2026

[Previous Topic
Configure Ethernet features](https://docs.qualcomm.com/bundle/publicresource/80-70030-26/topics/configure-ethernet-features.md) [Next Topic
References](https://docs.qualcomm.com/bundle/publicresource/80-70030-26/topics/references.md)