I have given up with it, just using it as a repeater to boost my BT router (wifi), too much hassle all these beta firmwares that seem to solve nothing. 

@naz_eg 

I find it hard to believe that the VR2100 has been out for around 1 year and yet it still has unresolved critical issues

I even found the box for it so tempted to send it back now to Amazon 

@Zajic 

Why there's another DNS settings in LAN Settings then? GUI is terrible.

@PaulPP 

No point in flogging a dead horse.  I doubt these critical issues will be resolved any time soon, if at all.  The VR2100 is a very dissapointing product hence I returned mine back to Amazon and left a review to suit.

@naz_eg I have not absolute idea.  Maybe bug.

EDIT: But this is the smallest problem now.

I had the second problem after 2 hrs the last rebood today. The download speed dropped to 0.1Mbit and had to reboot manually. The CRC errors raised significantly again as u can see.

https://static.tp-link.com/beta/2021/202102/20210222/Archer_VR2100V1_210219.zip 

This bag of rubbish dropped connection yet again. Might just get my rock solid Billion 8800nl back out. At least that is reliable unlike this garbage. The only reason I bought the VR2100 was for the "supposedly better" WIFI but TP-Link can,t even stop that from dropping out!

Here are my logs TP-Link and please don,t embarrass yourselves by making out the problems are with my ISP. The problems only started after connecting the VR2100.

This router was clearly not ready to be released to users.