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TP-LINK AP500 AC19000 - Basically - it's junk with the current firmware.
on 23 April 2016
RE: AP500 AC19000
This product appears to still be in its first iteration of firmware and in one evening I seem to have encountered a number of bugs. As a previous owner of the TPLINK WA901ND, I expected a similar experience but with better throughput. I got the opposite.
Set as Multi SSID - I noticed that in spite of setting the AP with a static IP, it was repeatedly running DHCP requests for a particular IP address (192.168.1.215) filling the log with failed attempts. My DHCP server confirmed that it was receiving this request. Why does it need to do this if I've manually assigned one already? This hints at poor quality code to me.
In Multi SSID mode - I could no longer whitelist MAC addresses per SSID as I could on the 901ND. This is a step back in functionality on a much more expensive box. I also don't appear to be able to manage the unit outside of the subnet it resides in (yes I did set a gateway), which is poor.
But the odd thing that I simply cannot fathom is why it appears that anything running through this AP has repeated problems trying to make DNS queries. Frequently, pages take an age to load - waiting for name resolution to finish. Sometimes they never load and just timeout. One minute it works and the next minute it doesn't.
I did wonder whether it was something to do with my internal DNS servers - but nslookup checks against external DNS servers (e.g. 126.96.36.199) seemed to get the same issues - name resolution hung and hence, pages failed to load.
The moment I put my WA901ND back - without changing anything else in my infrastructure, everything just worked again.
In its current form, the AP500 AC1900 is, in my humble opinion, a complete turkey. For the money TP-LINK are asking for it (3 times the WA901ND), they're having a laugh, and I certainly don't have the time to waste hanging around for them to churn out better version of the firmware to fix their rather odd problems.
Mine is going back in the box and I'll be asking for my money back.