> ## Documentation Index
> Fetch the complete documentation index at: https://dragonwingdocs.qualcomm.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Configure Ethernet with RJ45 port

Ethernet/RJ45 port is enabled as a downstream port of PCIe to USB controller
(`renesas`). Ensure that the `renesas_usb_fw.mem` file is available at the
`/lib/firmware` directory.

* If the `renesas_usb_fw.mem` firmware isn't available at the `/lib/firmware`
  directory, then [update USB and Ethernet controller firmware](./how-to-update-usb-ethernet-controller-firmware).

* To check if the USB to Ethernet controller is enumerated, run the following
  command:

  ```bash theme={null}
  lsusb
  ```

  ```text Sample output theme={null}
  Bus 002 Device 003: ID 0b95:1790 ASIX Electronics Corp. AX88179 Gigabit Ethernet
  Bus 002 Device 002: ID 05e3:0625 Genesys Logic, Inc. USB3.2 Hub
  Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
  Bus 001 Device 002: ID 05e3:0610 Genesys Logic, Inc. Hub
  Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  ```

* Connect an RJ45 cable to the device:

* Check the Ethernet IP address:

  ```bash theme={null}
  ip address
  ```

  `10.219.0.106` is the IP address.

  ```text Sample output theme={null}
  enP1p4s0u1u1 Link encap:Ethernet HWaddr A6:CD:9B:FD:C1:B5

  inet addr:10.219.0.106  Bcast:10.219.1.255  Mask:255.255.254.0
  inet6 addr: fe80::a370:7a00:8131:5a03/64 Scope:Link
  UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
  RX packets:1071 errors:0 dropped:0 overruns:0 frame:0
  TX packets:132 errors:0 dropped:0 overruns:0 carrier:0
  collisions:0 txqueuelen:1000
  RX bytes:60711 (59.2 KiB)  TX bytes:18342 (17.9 KiB)
  ```