connecting a gigabit ethernet switch (TP-LINK SG1008D) to Xfinity Router (Arris TG 862)

[Nanzer120]

I need some expert help please..I am trying to increase the number of ports available and have connected a gigabit ethernet switch to existing xfinity modem/router.
Problem is that when I connect a device (laptop) to the new switch, it cannot access the internet, whereas if I connect it directly to the existing router, it has connectivity. I just connected the router and switch using a standard ethernet cable and assumed that if its plug and play, I should be ab;e to connect a device to any of the 8 ports on the switch and they should have seamless connectivity, but that doesnt seem to be the case..any thoughts on what I could be missing? Wondering if its a specific issue with the Xfinity Arrris TG 862 router and it does not recognize the switch?

 

[USAFRet]

Yes, a switch should be pretty much plug and play.

What port on the router are you using to go to the switch?

 

[Nanzer120]

USAFRet - I am using 1 of the 4 router ports to go to the switch. As part of the debugging process, I just found out that the problem is slightly different than what I originally posted. When I connect my laptop to the switch directly with a cable, I can access the internet, so the switch seems to be doing its job. What is most baffling is that if I try to connect the laptop to the ethernet wall jack in my office, (when the switch is connected to the router), it is unable to access the internet. Which led me to believe that maybe it was a problem with the internal cabling which feeds from the central point in the house into the office and other rooms... However, when I take the switch out of the equation and connect the other end of the office cable directly into the router (essentially taking the switch out of play), and then connect to the wall jack in the office, everything seems to work fine ! So am very confused as to why the connection via the wall jack works directly with the router, and not when it is through the switch..!

 

[Nanzer120]

USAFRet - I am using 1 of the 4 router ports to go to the switch. As part of the debugging process, I just found out that the problem is slightly different than what I originally posted. When I connect my laptop to the switch directly with a cable, I can access the internet, so the switch seems to be doing its job. What is most baffling is that if I try to connect the laptop to the ethernet wall jack in my office, (when the switch is connected to the router), it is unable to access the internet. Which led me to believe that maybe it was a problem with the internal cabling which feeds from the central point in the house into the office and other rooms... However, when I take the switch out of the equation and connect the other end of the office cable directly into the router (essentially taking the switch out of play), and then connect to the wall jack in the office, everything seems to work fine ! So am very confused as to why the connection via the wall jack works directly with the router, and not when it is through the switch..!