Linksys Router not connecting to internet through switch

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I am setting up a new Linksys WRT610N router, and I connected it to my Apple Airport Extreme, and it connected to the internet perfectly. But I set up a Netgear GS108 switch, connected it to the modem, and connected the Apple Airport Extreme and Linksys WRT610 router to the switch and the Apple Airport Extreme works fine like before, but the Linksys WRT610 router does not connect to the internet!

I tried using different LAN cables and plugging the LAN cable to different ports of the switch, but no matter what, the router does not connect to the internet although I can join the wifi network and on the router the green internet circle is blinking.

What happened? Also, I am using a late 2013 Macbook pro if it is a client issue.

Big Ben GamerGuyKSPMC

Posted 2016-02-08T17:42:01.073

Reputation: 15

Answers

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Your ISP is only giving you a single IP address. When you put a switch to the modem and connect multiple devices WAN ports to the switch as peers, only one will get an Internet address from the ISP.

You need to pick which layer-3 (routing) device will be your connection to the modem, and any other devices need to be connected behind that device.

Ron Maupin

Posted 2016-02-08T17:42:01.073

Reputation: 3 130

OOOOOH... so then if I unplug the apple Airport and plug it into the Linksys then the Linksys will work?! THANKS!!!!!!! – Big Ben GamerGuyKSPMC – 2016-02-08T17:57:12.247

I wish I had enough reputation to upvote this question xD – Big Ben GamerGuyKSPMC – 2016-02-08T17:57:41.403

I plugged it in the router, but it still doesn't connect to the internet :( – Big Ben GamerGuyKSPMC – 2016-02-08T18:25:20.520

How are you connecting this? – Ron Maupin – 2016-02-08T18:26:05.337

connecting linksys directly to modem with LAN – Big Ben GamerGuyKSPMC – 2016-02-08T18:29:56.627

Plug the Linksys WAN port into the modem (you may or may not need to disconnect the modem for a short period of time). The Linksys may need to be properly configured for PPPoE or whatever authentication your ISP may be using. Then you can plug whatever you want for your local network into the Linksys LAN port(s). You may want to set the Airport as a bridge instead of a router in order to eliminate double-NAT. – Ron Maupin – 2016-02-08T18:32:58.590

Well Im using the linksys to port forward xD – Big Ben GamerGuyKSPMC – 2016-02-08T18:43:20.650

The Linksys will not request an IP address except on the WAN port. You can do port forwarding on the Linksys, but it forwards from the WAN to the LAN, and it NATs from the LAN to the WAN. The WAN port needs to be connected to the modem, and anything in your network needs to be connected to the LAN. When you make changes like this, you will need to get new DHCP from the Linksys instead of the Airport. The Airport should probably configured as a bridge so that the Linksys port forwarding will work (double-NAT will kill the port forwarding). – Ron Maupin – 2016-02-08T18:47:48.667

what is WAN? :P – Big Ben GamerGuyKSPMC – 2016-02-08T18:54:54.800

WAN is Wide Area Network. It is the Interface toward the Internet (your modem). The Linksys should have a single WAN port, and one or more LAN ports. The WAN port must be connected to the modem. – Ron Maupin – 2016-02-08T18:58:03.487