Posted: Tue Dec 12, 2017 8:57 Post subject: Archer C7 V2 installed to DD-WRT version r33986 5GHz problem
First let me confess I'm a bit of a noob to this so could have done something stupid!
I followed instructions to install DD-WRT on my Archer C7 v2 (UK purchased) router. First installing factory to DD-wrt then upgrading firmware to version r33986 as I thought seemed to be the right build from scouring the forums/info.
All went smoothly and I connected to it wirelessly now but only on the 2.4Ghz band. Though the interface shows the second 5GHz band it is not visible, has a mac address of w�7�w�F on interface ath1 and comes up as radio: "unknown" and channel "unknown".
I am sure there is something dumb I have done. Can anyone advise or assist me?
Posted: Sat Dec 16, 2017 17:31 Post subject: Archer C7 v3 - same problem
Had the same exact problem on Archer C7 v3 with the garbled characters listed for the 5GhZ HW Address using version build r33986 from 12-04-2017 and other settings messed up also (no Channels in dropdown, for example).
Updating to very latest build r34080 from 12-14-2017 fixed the problem.
Just be sure to do another 30/30/30 after updating. It definitely had some jacked up nvram settings because of the bug in r33986 that caused authentication problems on 5GhZ even after updating. After 30/30/30 it worked fine. I know this is standard advice, but just in case you ignore it and it doesn't work, do a 30/30/30 before you try anything else.
It does seem that you need to set 5GhZ Wireless Network Mode to AC/N-MIxed for it to work however. Left on Auto, I could not see it in available networks. This info was found on a couple other forum topics as well.
Hope info helps anyone trying dd-wrt on Archer C7 v3.