I'm using now OpenWrt for quite a long time and especially I'm happy with my Linksys WRT1900ACS. I was pushing back the update to the new 21.02.x branch as the device is affected by the swconfig vs. DSA change, such it will take more time to get everything up and running again.
Today I tried and used the sysupgrade for 21.02.1. I unchecked to reuse the old config as of the switch to DSA and checked the forced update. The router did the update and came back with the known standard address and I started setting up the device again based on the old config.
What I noticed is that WAN interface was working, got a proper IPv4 ad IPv6 address, but the LAN and Wifi connected devices didn't got an internet connectivity. Device diagnostics where also fine (regarding ping, traceroute, nslookup).
I checked the description here: https://openwrt.org/docs/guide-user/network/dsa/converting-to-dsa and I have in my 19.07.8 config the
config switch option name 'switch0' option reset '1' option enable_vlan '1' config switch_vlan option device 'switch0' option vlan '1' option ports '0 1 2 3 5t' config switch_vlan option device 'switch0' option vlan '2' option ports '4 6t'
But there is no kind of VLAN config or bridging between LAN and WAN in the new 21.02.1 configuration. Now I wonder, does the default config of the OpenWRT SW doesn't configure routing between WAN and LAN? I was guessing that should be a standard for a router device.
I tried to add the configurations from the named description:
config device option type 'bridge' option name 'br0' list ports 'lan1' list ports 'lan2' list ports 'lan3' list ports 'lan4' list ports 'wan' config bridge-vlan option device 'br0' option vlan '1' list ports 'lan1:u*' list ports 'lan2:u*' list ports 'lan3:u*' list ports 'lan4:u*' config bridge-vlan option device 'br0' option vlan '2' list ports 'wan:u*'
Then rebootet the router and reset the network interface on my windows, anyhow the situation stayed the same.
Windows PC just got an IPv4 address from the internet network range. IPv6 was not assigned, so prefix handling also seems not to be standard in the configuration.
I now switched back to 19.07.8 and rolled back my config from backup cause I was trying for a few hours but need internet at some point (e.g. to create this new topic ).
Does somebody have a sample config, so to come to a standard forwarding behavior of the router? I do not have any special needs like several separated networks and I know how to work on a command line. (Hope I don't need to have a deeper dive into DSA just to be able to update from 19.07.8 to 21.02.).
Any help is welcome!