Hello,
I am not sure that I am posting in the right place, but this is about the WRT1900AC. I have a new unit (actually a refurbished from Linksys straigh from the box as purchased onthe store) and it is a V1 (the serial number starts with 13J10.
I flashed it with Chaos Calmer (openwrt-15.05-mvebu-armada-xp-linksys-mamba-squashfs-factory.img) and everything went fine. I logged into it and the first thing I want to do is to create a small netwrok on the LAN side (192.168.3.0/24). So I set the unit to 192.168.3.1 with the proper mask (255.255.255.0). On the WAN side, I set it to obtain a DHCP address from my intranet (192.168.1.0/24). I apply the change and everything works OK: the WAN got an IP address (192.168.1.119) with a gateway at 192.168.1.254 and a DNS at 192.168.1.4 (these are the normal setting of all the computer at home). A laptop conencted by wire to the LAN side got a IP of 192.168.3.174: all is fine!
I can HTTP to the WAN fine, and I can HTTP to the LAN fine also.
Now problems starts: from the laptop, I cannot access the web or by network: I cannot get out of the 192.168.3.0/24 network. If I try to get to google on the laptop, it doesn ot work. But, if I go to Network/Diagnostic, I can ping dev.openwrt.org fine, a traceroute and a snlookup works also fine!
Obviously, there is something that does not work with the gateway portion of my OpenWRT settings. I played a lot with it, and I am sure that it is more or less the way it was after the flash and the settings described above. I assume that by default OpenWRT is setup as a gateway, as long os the WAN can connect properly and the LAN is on a different network. Am I right here.
I realized also when playing around that the Network/Wireless is not there: there is no way to setup the wireless. This is very odd!
Now, as I palyed a little bit with it, I decided to put it back to default: thre is not "Perform reset" on the System/Backup/Flas Firmaware page. I cannot put it back to the default of OpenWRT!
So I decided to refalsh it with the sysupgrade file (openwrt-15.05-mvebu-armada-xp-linksys-mamba-squashfs-sysupgrade.tar). It applies the update, it flashes (I assume), then nothing! My laptop looses connection and cannot get an IP back! (I have not tried on the WAN side). I then assumed that it is bricked (OMG). Then I tried the Backup Firmware Recovery descibed on the page http://wiki.openwrt.org/toh/linksys/wrt1900ac: I did not follow exactly the process but eventually the router power LED is solid: I plug my laptop in the LAN side, and zoom I get the address 192.168.3.174 and I am back at where I was before updating the firmware: I have OpenWRT with my settup descibed above (192.168.3.1 on the LAN and 192.168.1.119 on the WAN.
So, as I am bold, I decided to put back the linksys firmware: I flas with the file FW_WRT1900AC_1.1.10.167514_prod.img.
BTW: on both time I flashed, I uncheck the Keep settings!
After the flash with the Linksys firmware, nothing is happenning: my laptop cannot get an IP! I am back at a bricked router (OMG again)!
I then do the process to do the Backup Firmware Recovery: this time I do it to the letter! I am back at OpenWRT with the same settings: I have OpenWRT with my settup descibed above (192.168.3.1 on the LAN and 192.168.1.119 on the WAN.
Now, can someby shed some light here: I am stuck at OpenWRT with some settings that I made, and I do not find any way to go back to a fresh OpenWRT installation: I cannot falsh with the sysupgrade file, I cannot tell the router to go to the default settings, ad I cannot flash back the Linksys firmware. Also, the gateway does not work properly and I do not have any access to the wireless!