Linksys WRT1900acs v2 does not have valid IP config after LEDE install

Installing and Using OpenWrt
1

I tried flashing my Linksys wrt1900acs v2 with the firmware lede-17.01.4-mvebu-linksys-wrt1900acs-squashfs-factory.img and now i can't connect to it at all. Windows tells me that my network does not have a valid IP configuration. I have tried to ssh into it but that does not work either. The lights on the front of the router still look like it it behaving normally. Have i killed it with the wrong image file?

2

This is probably related to that commit:
https://github.com/openwrt/openwrt/commit/85048a9c1fa4d37b5896d9237d28bbadbbe09d19

And fixed with this commit:
https://github.com/openwrt/openwrt/commit/7e664b7c2dc00006ba29bf947cf177b5bccdc47d

Use a newer trunk image and issue will be fixed...
Happens only on a clean flash.

Failsave mode should work anyway...
https://wiki.openwrt.org/doc/howto/generic.failsafe#triggering_by_pressing_any_hardware_button_during_boot

3

The 17.01.4 series was not affected by these commits.

4

Ups... Did not get it that he uses 17.04.
Shame on me.

Anyway. Try with fixed ip on your pc (ip 192.168.1.2 netmask 255.255.255.0) and probably with failsave mode.

5

Thanks for the reply. I have managed to boot it into fail safe mode. I set a fixed IP on the computer and windows is still saying the network does't have a valid IP config. I did notice now when i try to access 192.168.1.1 it doesn't time out, it says it can't connect to the server. So i tried to ssh into it again and it worked. I don't have much experience with linux command line apart from following a few tutorials. Is there a way to flash the stock firmware back on through ssh?

6

Looking through the file system i opened /etc profile and it is displaying a message saying
'Your JFFS2-partition seems full and overlayfs is mounted read-only.'
'Please try to remove files from /overlay/upper/... and reboot!'
Not sure if i have just opened something that is always there or it is a valid issue.

7

Thanks for the help, i managed to get it up and running with stock firmware again. After wiping the JFFs2 file system as per the openwrt generic fail safe wiki through ssh i was able to access the web GUI. There was still no valid IP config and i couldn't flash stock firmware from the web GUI, so i had to use WinSCP to copy the firmware file to the /tmp directory and flash the firmware using the sysupgrade command with -n -F flags to force the install. Hopefully this can help someone else if they have a similar issue. Again thanks for the suggestion of the fail safe boot as that is what got me to the answer.

8

How can you transfer a image with winscp if ip config is not ok?
Probably windows does only comply about no internet connection... Or you have a second active network device with the same subnet running on your pc...

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9

Did you follow the Flashing Firmware steps laid out in the WRT AC Series ToH page?

  • Did you flash via WiFi or ethernet?

What was the output from the system log? Issue: logread

  • Simply guessing at this or that is pointless, and the system log output would be required, especially the boot log portion.
    • This can be accessed either via SSH (DropBear / OpenSSH) or Serial
      • If you have not yet invested in a USB-TTL cable or USB-UART, this should be had prior to flashing any 3rd party firmware
        • Serial access is the only way to troubleshoot boot related issues (which it appears this is). This is why it's the second bullet under Introduction
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