Sipeed NanoCluster is a palm-sized cluster board with seven slots for Raspberry Pi CM4/CM5, Sipeed LM3H, and/or Sipeed M4N system-on-modules. It features a RISC-V Gigabit switch, independent UART and power control for each module, and supports up to 60W USB-C PD or PoE.
This article details how the author successfully set up a Pi-hole DNS server using a $15 Raspberry Pi Zero 2 W, highlighting its low cost, low power consumption, and surprisingly capable performance for handling DNS requests and ad blocking for a home network.
I editted /etc/udev/rules.d/70-persistent-net.rules and swapped the MAC addresses of eth0 and eth1. the rebooted!