It will use Port 2-5 as LAN by default where it is available at the IP 192.168.1.1. $ sudo dnsmasq -no-daemon -port=0 -dhcp-range='192.168.1.50,192.168.1.150,12h' -enable-tftp -bootp-dynamic -dhcp-boot='lede-17.01.4-ar71xx-mikrotik-vmlinux-initramfs.elf' -tftp-root='/home/user/path/to/file'ĭnsmasq: started, version 2.79 DNS disabledĭnsmasq: compile time options: IPv6 GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack ipset auth DNSSEC loop-detect inotifyĭnsmasq-dhcp: DHCP, IP range 192.168.1.50 - 192.168.1.150, lease time 12hĭnsmasq-tftp: TFTP root is /home/user/path/to/fileĭnsmasq-dhcp: BOOTP(enp0s25) 192.168.1.78 d4:ca:6d:e3:f5:b7ĭnsmasq-tftp: sent /home/user/path/to/file/lede-17.01.4-ar71xx-mikrotik-vmlinux-initramfs.elf to 192.168.1.78 At this point release the button and close dnsmasq using Ctrl+C: Wait for ~15s you will that device is using BOOTP to fetch the file in the dnsmasq output. Press the RES button on the device and connect it to power.

Set a static ip on your wired interface (if you use NetworkManager or a similar tool use its capabilities or turn off the interface so that it won't interfere):

Lede-17.01.4-ar71xx-mikrotik-nand-64m-squashfs-sysupgrade.binĬonnect your Linux workstation directly to the first port (1) of the device to your wired interface (directly to make sure that there won't any other DHCP server interfere). Lede-17.01.4-ar71xx-mikrotik-nand-large-squashfs-sysupgrade.bin Lede-17.01.4-ar71xx-mikrotik-vmlinux-initramfs.elf Get these files (available here for the OpenWrt/LEDE 17.01 release):

Here is a simple guide to flash OpenWrt/LEDE on your RB750GL from your Linux workstation…

Mikrotik routerboard upgrade firmware