Using a DSL Router/Modem combo as a Router with Cable Internet - Computer Technical Help

Two Plus Two Forums Other Topics Computer and Technical Help

Using a DSL Router/Modem combo as a Router with Cable Internet

Post Reply Subscribe

...

04-30-2015 , 05:16 PM

DrawNone

Pooh-Bah

Join Date: May 2013 Posts: 5,023

i just had cable internet installed and the modem has one Ethernet jack. i have 2 DSL router/modems (an ActionLink and a D-link). they both have 4 LAN jacks.

i tried cable modem -> DSL modem in LAN 1 -> DSL modem -> computer in LAN 4 and it worked instantly, but when i tried to connect other devices in LAN 2 or 3 they did not register a connection.

any advice to make one of these router/modem combos function before i buy a new router?

Quote

04-30-2015 , 05:22 PM

Anais

Carpal \'Tunnel

Join Date: Mar 2006 Posts: 6,663

i think your best bet is to look around on google for "use dsl gateway as router"

problem seems to be that your old gateway is behaving as a switch (on the 4 ports) so that the first device connecting is getting the IP address your cable router is offering.

It may be possible to set things up a way to make this work, but it's probably not worth the time it would take to research it

Quote

04-30-2015 , 06:11 PM

DrawNone

Pooh-Bah

Join Date: May 2013 Posts: 5,023

thanks for the response, great advice, excellent search terms lol. 1st result seems like the exact scenario i'm in.http://www.techrepublic.com/forums/q...thout-the-dsl/

i need to recharge my patience be4 digging in to the stuff in that link. a bit more complicated than the "Settings->Router->On" i was hoping for. i'll give it a shot 2moro, thanks again.

Quote

05-06-2015 , 09:45 AM

gadgetguru

grinder

Join Date: Nov 2012 Posts: 611

If you have access to login to the cable modem, see if it has a dhcp option to turn on, then your initial setup would work. Otherwise, you're not likely to be able to configure a DSL modem to wan->lan as the nat is typically done from the DSL to lan.

Quote

05-12-2015 , 08:32 PM

IBNash

centurion

Join Date: Oct 2013 Posts: 186

Odd, are the DSL modems still behaving like routers? Can you access their web interface at the default IP?
It sounds like those other LAN ports aren't being switched, need packet captures to know.

Are you looking to just have more LAN ports to share Internet to wired devices via the cable modem? A switch would be cheaper than a new router.

Quote

05-13-2015 , 02:27 PM

Low Key

Carpal \'Tunnel

Join Date: Jan 2007 Posts: 33,327

a switch wouldn't work, it would produce the exact same results he's getting with his DSL gateway. That's because a gateway is part modem, part router, part switch. He only has physical access to the switch parts of the gateway (through his cable modem).

It seems unlikely there's a way to configure one of the gateway switch ports as a router interface, which is why it's way easier to just go buy a router.

Quote

Post Reply Subscribe

...