Disconnect all the Ethernet cables from all the ports.
Connect one of those eight "bad" ports to your laptop.
See if the port works when it is the ONLY active port.
If not, move the cable to the next of the eight "bad" ports, and test again. Repeat.
Move the cable to one of the 40 "good" ports, and test.
If it works, then you have a hardware problem with that "group" of 8 ports.
Your choice to use only the 40 "good" ports, or to replace the router, if you need those last 8 ports.
SOURCE: Linksys SRW2008 blocking ports
blocking ports and QoS is a layer 3 function, switches are layer 2 unless you buy a layer two switch. You will need to do this on your router.
SOURCE: Good morning, how do I
There is a tiny reset button on the back of the switch.
Power off the switch. keep the tiny black switch pressed and do not release that. Power On the switch and the sys LED will blink slowly and then rapidly. Now release the black button and wait for 5 minutes.
Testimonial: "Thanks AbhiRay, info is help full, excellent job!"
SOURCE: Linksys SRW2008P 8-Port Gigabit Ethernet
Not much you can do when you have dead ports on a switch but just to replace the whole switch. The cost of having someone take it apart and repair/replace the dead ports will probably cost more than a new switch.
You may not be able to do MAC Filter in SRW2008. but you can do Static MAC address on the device which allows the computers in Static MAC table can connect it in your switch.
Hope this may help you !
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