![]() ![]() ![]() Our bootcode.bin is stored in /srv/tftpboot/rpi as this is the tftp-root we configured for dnsmasq. The RPi 3B+ looks up bootcode.bin or bootsig.bin from the tftp boot directory. ![]() This official Raspberry Pi document helps to check and upgrade the Pi's firmware if needed. On older RPi 3B+ models netboot was not enabled by the default firmware. These stages are not necessarily matching the stages that are referred and can be found in other documentation describing network booting of Linux computers. The information about the boot process is also valid for RPi 4B units. We identify 4 stages for the boot process. In the next section we will describe what else is required on the netboot server in order to boot RPi 3B+ and RPi 4B MicroMEC nodes. With this we have verified that the RPi received an IP address, and dnsmasq tried to push a file to the RPi. ![]() May 2 18:24:38 localhost dnsmasq-tftp: file /srv/tftpboot/bootcode.bin not found Monitor /var/log/daemon.log on the MicroMEC netboot server # tail -f /var/log/daemon.log Initial test of the MicroMEC netboot serverĬonnect an RPi 3B+ (without an SD card) to the switch. We have separate documents detailing how to prepare the rootfs on the netboot server: RPi 4B nodes will mount the rootfs via nfs (the iscsi boot is currently unsupported). The dnsmasq configuration looks like this: # cat /etc/nfĭhcp-range=192.168.4.10,192.168.4.250,255.255.255.0,12hĭuring the netboot the MicroMEC RPi 3B+ nodes will mount their root file systems from the netboot server via iscsi. Traffic between the MicroMEC nodes and the Internet will be routed via that gateway.ĭnsmasq acts as a DHCP and TFTP server to enable network booting of the MicroMEC nodes. The gateway IP address above is a dynamic IP address for the other NIC. Our netboot server static IP configuration is as simple as that: # cat /etc/network/interfaces This Ethernet based setup mimics the fast fiber or 5G connections between MECs in a real life deployment. This NIC will be connected to a network switch.Īll the MicroMEC nodes will connect to the same switch via Ethernet.
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