Fix for Orangepi-r1plus-lts network interface logical names that changed and broke networking.
The problem was caused by one of the network interface logical names changing from eth0 to end0. Fixed with a rename in /etc/udev/rules.d/70-rename-lan.rules which is already created from a hook in the board config file (to rename the other network interface).
On network:0 the logical name: end0 should be eth0
root@orangepi-r1plus-lts:~#
*-network:0
description: Ethernet interface
physical id: 9
logical name: end0
serial: 8a:af:66:80:41:ea
size: 1Gbit/s
capacity: 1Gbit/s
capabilities: ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=st_gmac driverversion=6.1.29-rockchip64 duplex=full ip=192.168.0.136 link=yes multicast=yes port=twisted pair speed=1Gbit/s
*-network:1
description: Ethernet interface
physical id: a
bus info: usb@3:1
logical name: lan0
serial: 8a:af:66:80:41:0a
size: 1Gbit/s
capacity: 1Gbit/s
capabilities: ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=r8152 driverversion=v1.12.13 duplex=full firmware=rtl8153b-2 v1 10/23/19 ip=192.168.0.138 link=yes multicast=yes port=MII speed=1Gbit/s