![]() Supported link modes: 10baseT/Half 10baseT/FullĪdvertised link modes: 10baseT/Half 10baseT/Full Control receive queue selection for multiqueue devicesĭisplay the physical status of an Ethernet port in Linuxįor example, get info about eno1 Ethernet device:.Update or set DMA ring sizes and interrupt moderation.Control checksum offload and other hardware offload features.Set or get speed, duplex, autonegotiation and flow control for Ethernet devices.Find identification and diagnostic information.Display info about network adapter status.It provides the following information from the Linux CLI: How to query or control network driver and hardware settings in Linuxįor wired Ethernet devices, you need to use a command called ethtool. It also displayed my mac address 40:9f:38:28:f6:b5. The above command indicates that my Ethernet is up and running with 192.168.2.24/24 IP address. # Say eno1 or wlp1s0 is your NIC name, then # So wlp1s0 is my Wireless and eno1 is my Ethernet Connection. 2 virbr0-nic network Ethernet interface 0/ 100/1f.6 eno1 network Ethernet Connection I219-LM Macb0: link up, 100Mbps full-duplex (lpa: 0x41e1) Macb0: Autonegotiation timed out (status=0x7849) Gmac0: Autonegotiation timed out (status=0x7949)ĮRROR: Need valid 'usbnet_devaddr' to be setĪt drivers/usb/gadget/ether.c:2362/usb_eth_init() Note that there also a rotation scheme that automatically changes the active port when the ports are down: U-Boot> printenv ethact Gmac0: link up, 1000Mbps full-duplex (lpa: 0x2800) (I don't know what happens with an IP address acquired by DHCP using one port, and then the active port is changed.) U-Boot> printenv ethact There is also only one static IP address assignment, i.e. Obviously you can only (easily) access one port at a time. U-Boot refuses to delete or overwrite this variable once it has been set.Įth1addr: Ethernet MAC address for second ethernet interface (= eth1 in Linux).Įth2addr: Ethernet MAC address for third ethernet interface (= eth2 in Linux). This variable can be set only once (usually during manufacturing of the board). scripts do not change).Įach Ethernet port is assigned its own MAC address, using the following environment variables: ethaddr: Ethernet MAC address for first/only ethernet interface (= eth0 in Linux). ![]() This preserves the command syntax with older versions of U-Boot, and the syntax is consistent regardless of the number of available ports (e.g. The U-Boot network commands, such as ping and tftpboot, will use the Ethernet port defined by the ethact variable. Use the setenv ethact to change the active Ethernet port. Use the printenv ethact command to view the current selection. "Net: macb0, gmac0, usb_ether"), the environment variable ethact is used to define the selected Ethernet interface that is active. When more than one Ethernet interface is available (as reported by the "Net" device list on startup, e.g. No, recent versions of U-Boot can support more than one Ethernet port on the board. Is there an inherent restriction where u-boot only supports a single ethernet port? Salient code is eth_current_changed() and eth_set_current() in net/eth.c. Yes, in recent versions of U-Boot (going back to at least 2012.10). Can u-boot support more than one ethernet port?
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