As always I flashed a new snapshot through luci, connect via ssh, set password and try to install luci. It looks like this time my Linksys wrt1900ac v2 can not get an inet connection. The Linksys is connected via lan 1 to my isp router. I set isp router to 192.168.1.2, Linksys is 192.168.1.1. I can access via SHH and my Windows PC connected via lan 2 to Linksys has inet.
BOTH NETWORKS CANNOT BE 192.168.1.0/24. You MUST renumber one of the LANs, as this is why you don't have Internet!
There is no difference, LuCI is not included with SNAPSHOT. Therefore, you need Internet to install it. To do so, you must have a different network on both sides of your LEDE, if not, you will not route to the Internet (the default gateway).
It looks like you have two, separate 192.168.1.0/24 subnets and no way to route them. Generally that is s configuration most avoid with vigor. Changing one or the other to 192.168.n.0/24 or bridging them are generally used practices.
OK I changed my isp router to 192.168.0.1 and 255.255.0.0 the Linksys with lede is 192.168.1.1 and my notebook is connected via lan cable to the Linksys but still no chance to install luci through ssh. Any ideas? How can I flash back a lede with luci?
If you connect by a lan port you have to go to the LAN settings and set it up so that:
the router lan is in the same subnet but different IP than the main router.
add an "option gateway" to the lan with the main router's IP
add an "option dns" to the lan with the main router's IP or other DNS server
Then go to /etc/config/dhcp and turn off the DHCP server on the LAN by adding an "option ignore 1" and setting the IPV6 settings to "disabled"
With these settings the OpenWrt router is another device on your LAN and it has Internet access through the main router. Turning off the DHCP server is important to prevent other devices from getting incorrect DHCP settings from the OpenWrt router.
Finaly I get my 1900AC V2 to work with latest LEDE.
Now there is a different problem, 2,4GHz wireless is working but 5Ghz was enabled but when I changed channels and txpower and saved it will never turn on again. Even when I disable and enable it will still stay off.