The R6400v2 is now supported by Freshtomato. You will need to flash the initial first, then flash the full version. Advanced tomato is no longer in development and did not support this router.
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i am not sure this supports v2 router. I messaged the guy at his website (advancedtomato) and got no reply yet.
any update on this as I have V6400v2 I would like to flash with tomato
The R6400v2 is now supported by Freshtomato. You will need to flash the initial first, then flash the full version. Advanced tomato is no longer in development and did not support this router.
Full discussion and support can be found here:
https://www.linksysinfo.org/index.php?forums/tomato-firmware.33/
Here is the initial file:
https://bitbucket.org/snowman58/freshtomato-arm/downloads/freshtomato-R6...
Here is the AIO:
https://exotic.se/freshtomato-arm/v2019/2019.3/K26ARM-NG/freshtomato-R64...