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# Ethernet

The NXP i.MX6UL CPU has two 10/100 Ethernet MACs.

On the ConnectCore 6UL SBC Express:

- Ethernet1 port is connected to a Microchip LAN8720a PHY

On the ConnectCore 6UL SBC Pro:

- Ethernet1 and Ethernet2 ports are connected to Microchip LAN8720a PHYs

Kernel configuration | CONFIG_FEC
Kernel driver | drivers/net/ethernet/freescale/fec_main.c
Device tree binding | Documentation/devicetree/bindings/net/fsl-fec.txt

Note In the following table, the first column shows the U-Boot environment variables that hold the MAC address of each network interface:

- 'ethaddr' holds the MAC address for ENET1, Linux probes this second and sees this as eth1
- 'eth1addr' holds the MAC address for ENET2, Linux probes this first and sees this as eth0

U-Boot environment variable | Ethernet controller | Linux interface
--- | --- | ---
ethaddr | ENET1 | eth1
eth1addr | ENET2 | eth0

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Ethernet updated on 01 February 2018 01:57:00 PM