[StealthNet]

DIR 859 v3.0-r46259

Hi there!

I am trying to pin down a root cause for this:

I have a DIR859 with wifi disabled and configured as a NAT router between my LAN and the ISP fiber modem.

Real IP is on the ISP external interface;
Between it's internal interface and the DIR859 WAN port, a private LAN is configured (192.168.0.0/24). ISP modem is doing NAT;
DIR859 does another NAT for another private LAN (intranet 10.0.0.0/24) and it is configured as a gateway (advancec routing).

ISP rates: 200 Mbps down / 100 Mbps up.

I used this for years now with QOS enabled (HFSC, FQ_CODEL_FAST, 190/95 Mbps) and it seemed to work as it should.

Two weeks ago, I noticed a dramatic decrease in performance.

Down and up limited to 30 ~ 40 Mbps.

I upgraded from r46069 to r46259 to try to solve the issue, same results.

Disabling QOS solves the issue.

I know I am being a bit vague... not that I have the expectation to solve it with so little info, but just to ask where I should look for to understand this change in behavior.

Any ideas would be greatly appreciated.

Thanks in advance!

[blkt]

I do not have this router but here are the hw specs. https://wikidevi.wi-cat.ru/D-Link_DIR-859_rev_A1

This model is most the recommended on the forum. https://wikidevi.wi-cat.ru/Netgear_R7800

https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=304977&start=60

Check to see if SFE is enabled. Try more efficient QoS config like msoengineer talked about in the thread.

If sure nothing has changed for the config maybe configure everything manually from scratch after reset.

[StealthNet]

Maybe I found a way out...

In the QOS page, I was trying to use MAC priority and Netmask priority. After deleting those, performance went back to normal (tested from a different machine from the ones specified).