poddmo

I just solved persistent network name for my Armbian 23.02.2 Focal with Linux 5.15.93-rockchip64 on NanoPi R4S with a systemd .link file. I came up with this generic .link file for NanoPi R4S based on https://wiki.debian.org/NetworkInterfaceNames and the man page for systemd.link(5). user@nanopir4s:/etc/systemd/network$ cat 10-persistent-net.link #/etc/systemd/network/10-persistent-net.link [Match] #MACAddress=04:91:62:11:22:33 Path=platform-fe300000.ethernet [Link] Name=enx0 The naming of the CPU-based ethernet device (fe300000.ethernet RTL8211E) was subject to a race at boot with the PCIe ethernet device (r8169 RTL8168h/8111h). user@nanopir4s:~$ sudo dmesg | grep -E 'eth|rtl|816|fe300' [ 2.335890] pci 0000:01:00.0: [10ec:8168] type 00 class 0x020000 [ 3.118663] rk_gmac-dwmac fe300000.ethernet: IRQ eth_wake_irq not found [ 3.118683] rk_gmac-dwmac fe300000.ethernet: IRQ eth_lpi not found [ 3.118810] rk_gmac-dwmac fe300000.ethernet: PTP uses main clock [ 3.119098] rk_gmac-dwmac fe300000.ethernet: clock input or output? (input). [ 3.119112] rk_gmac-dwmac fe300000.ethernet: TX delay(0x28). [ 3.119123] rk_gmac-dwmac fe300000.ethernet: RX delay(0x11). [ 3.119140] rk_gmac-dwmac fe300000.ethernet: integrated PHY? (no). [ 3.119213] rk_gmac-dwmac fe300000.ethernet: cannot get clock clk_mac_speed [ 3.119222] rk_gmac-dwmac fe300000.ethernet: clock input from PHY [ 3.125215] rk_gmac-dwmac fe300000.ethernet: init for RGMII [ 3.126451] rk_gmac-dwmac fe300000.ethernet: User ID: 0x10, Synopsys ID: 0x35 [ 3.126474] rk_gmac-dwmac fe300000.ethernet: DWMAC1000 [ 3.126484] rk_gmac-dwmac fe300000.ethernet: DMA HW capability register supported [ 3.126494] rk_gmac-dwmac fe300000.ethernet: RX Checksum Offload Engine supported [ 3.126502] rk_gmac-dwmac fe300000.ethernet: COE Type 2 [ 3.126510] rk_gmac-dwmac fe300000.ethernet: TX Checksum insertion supported [ 3.126519] rk_gmac-dwmac fe300000.ethernet: Wake-Up On Lan supported [ 3.126630] rk_gmac-dwmac fe300000.ethernet: Normal descriptors [ 3.126640] rk_gmac-dwmac fe300000.ethernet: Ring mode enabled [ 3.126648] rk_gmac-dwmac fe300000.ethernet: Enable RX Mitigation via HW Watchdog Timer [ 3.161734] r8169 0000:01:00.0 eth0: RTL8168h/8111h, f2:ca:e6:11:22:33, XID 541, IRQ 91 [ 3.161771] r8169 0000:01:00.0 eth0: jumbo features [frames: 9194 bytes, tx checksumming: ko] [ 3.442048] r8169 0000:01:00.0 enp1s0: renamed from eth0 [ 8.069286] rk_gmac-dwmac fe300000.ethernet enx0: renamed from eth1 [ 17.312235] Generic FE-GE Realtek PHY r8169-0-100:00: attached PHY driver (mii_bus:phy_addr=r8169-0-100:00, irq=MAC) [ 17.517652] r8169 0000:01:00.0 enp1s0: Link is Down [ 17.569528] rk_gmac-dwmac fe300000.ethernet enx0: PHY [stmmac-0:01] driver [RTL8211E Gigabit Ethernet] (irq=90) [ 17.573204] rk_gmac-dwmac fe300000.ethernet enx0: Register MEM_TYPE_PAGE_POOL RxQ-0 [ 17.574462] rk_gmac-dwmac fe300000.ethernet enx0: No Safety Features support found [ 17.574550] rk_gmac-dwmac fe300000.ethernet enx0: PTP not supported by HW [ 17.575063] rk_gmac-dwmac fe300000.ethernet enx0: configuring for phy/rgmii link mode [ 21.020601] r8169 0000:01:00.0 enp1s0: Link is Up - 1Gbps/Full - flow control rx/tx [ 21.270522] rk_gmac-dwmac fe300000.ethernet enx0: Link is Up - 1Gbps/Full - flow control rx/tx First I tried by MAC address then tried the more generic path_id user@nanopir4s:~$ sudo udevadm test-builtin net_id /sys/class/net/enx0 Load module index Parsed configuration file /usr/lib/systemd/network/99-default.link Parsed configuration file /usr/lib/systemd/network/73-usb-net-by-mac.link Parsed configuration file /etc/systemd/network/10-persistent-net.link Created link configuration context. Using default interface naming scheme 'v245'. ID_NET_NAMING_SCHEME=v245 ID_NET_NAME_MAC=enx049162112233 ID_OUI_FROM_DATABASE=Microchip Technology Inc. Unload module index Unloaded link configuration context. user@nanopir4s:~$ sudo udevadm test-builtin path_id /sys/class/net/enx0 Load module index Parsed configuration file /usr/lib/systemd/network/99-default.link Parsed configuration file /usr/lib/systemd/network/73-usb-net-by-mac.link Parsed configuration file /etc/systemd/network/10-persistent-net.link Created link configuration context. ID_PATH=platform-fe300000.ethernet ID_PATH_TAG=platform-fe300000_ethernet Unload module index Unloaded link configuration context.