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Network Configuration

Goals

  • default WAN port is used for link to local network with router
    • dhcp yes
  • default LAN port is used for direct connection to laptop
    • either without ICS (Internet Connection Sharing) and link local addresses (169.254.xxx.xxx) without gateway
    • or with ICS and DHCP (192.168.137.xxx) and with gateway (laptop)
Situation Windows Ethernet NanoPi SSH Internet NanoPi
home, connected to Router doesn't matter DHCP (192.168.2.x) 192.168.2.x with end0 over Router
direct Laptop, ICS 192.168.137.1 DHCP (192.168.137.x) nanopi-r3s-lts.local with enp1s0 over Laptop
direct Laptop, no ICS 169.254.x.x 169.254.x.x nanopi-r3s-lts.local no

/etc/netplan/30-ethernets-dhcp.yaml:

network:
  version: 2
  ethernets:
    end0:
      dhcp4: yes
      dhcp6: yes

    enp1s0:
      dhcp4: yes
      link-local:
        - ipv4
        - ipv6
      optional: true

sudo apt update
sudo apt install avahi-daemon

# check
systemctl status avahi-daemon --no-pager

# typically NOT needed
sudo systemctl enable --now avahi-daemon

disable EEE (Energy Efficient Ethernet)

sudo ethtool --set-eee end0 eee off
sudo ethtool --set-eee end0 eee on
sudo ethtool --show-eee end0