> Routeriai kaip jau minejau 2 bandyti. Su abiejais tas pats. Setingu 
> jokiu 100->10 nera ar bent jau nematau. Standartinis dd-wrt. Ir kaip 
> rasiau, paskui nekeiciant jokiu setingsu pavyko paleist 100.

taigi abiejuose galuose tariasi ar veikt ar 10, ar ant 100, ar ant 1000.
nebutinai tavo routerio portas veikia "ant ribos", gal ju switch'o
portas kartais pagrybauja ir susikaupus klaidu numusa greitaveika.

jei labai labai knistu tai galima butu bandyt elementaru switchiuka
iterpti tarp routerio ir ju sniuro.. paprastai switchiukai
kaip ir parodo lemputem tik dabar realiai a) 1000 vs b) 10/100

bet valdomuose gali rast "link speed".. pvz 23psl::
https://static.tp-link.com/2017/201712/20171222/1910012338_Easy%20Smart%20Switch_UG.pdf

* Speed/Duplex: Select the Speed and Duplex mode for the port.
The device connected to the switch should be in the same Speed and
Duplex mode with the switch. Available field values are “Auto”,
“10M HD”, “10M FD”, “100M HD”, “100M FD” and “1000M FD”.
"HD" stands for Half-Duplex and "FD" stands for Full-Duplex.
"Auto" means auto negotiation.

* Flow Control: Allows you to On/Off the Flow Control feature.
When “On” is selected, the switch can synchronize the speed with its 
peer to avoid the packet loss caused by congestion.

Tik tiek, kad valdoma switchiuka organizuotis tik kazkokiai 
diagnostikai, tai truputi ne i tema.. nebent kitur jo reiktu. ~22 Eur:

http://www.skytech.lt/tlsg105e-tplink-tlsg105e-5port-gigabit-easy-smart-switch-desktop-p-208472.html