Multiple ISP on single DSL

spiceuser-k0o0k · 2018-09-17T09:38:26.000Z

Two routers

pbrain · 2018-09-17T09:52:42.000Z

Wait…

Two routers o. A signgle DSL with 2 ISP’s?

No. Not possible. Because each ISP will bring their own DSL circuit to your home.

Now, if you have two DSL circuits connected to two DSL Modems, then you will need something like the TP-Link TL-ER5120. It is a multi WAN / Failover router for under $200.

chris.hone · 2018-09-17T09:56:29.000Z

I use a Draytek 2860 to manage mine, a single gateway to the network with failure over to separate DSL lines

donaldmoore6360 · 2018-09-17T10:45:16.000Z

What you are suggesting makes no sense. The whole reason to have two ISPs is to have two links to the world, in the event one of them fails. If you only have one physical link, there is no reason to have two ISPs.

Where I work, we have fiber from the telecom and one link that goes South and the other goes North-East, to geographically distinct centers and they are currently trenching another fiber in from a third provider. Each fiber is from a different provider and goes out to a geographically distinct circuit. We are looking to have, as close as possible, uninterruptable service.

spiceuser-k0o0k · 2018-09-17T11:21:09.000Z

The motivation here: I have to pay for two different ISP’s (no matter what’s the reason. Another story…). And I have only one dsl line. So two ISP with single dsl is a fact.
I need a method for using them both (each ISP has its own benefit).
I thought something like:
Connect the dsl line to a bridge/switch.
Connect the bridge to Ethernet ports of two different modems. One for each ISP.
Will it work?

reneduranona · 2018-09-17T11:41:03.000Z

Would something like this answer your question?

peterw2300 · 2018-09-17T11:41:56.000Z

I will watch this topic with interest. As far as I know the other end of the line from my house goes to a specific ISP provider equipment and if I wanted to change then they do something that can take a while to swap it over. To have the line connected in parallel sounds amazing. I can believe that you could end up paying two ISPs but only get service from one.

reneduranona · 2018-09-17T11:58:18.000Z

We actually installed this on one of our customer sites, as they had a very weird network setup. 1 Router for their Wi-Fi, 1 Router for their Admin Network, 1 Router for their Students Network, etc. But then with time they kept complaining that all of their connections were running too slow, and there was no way of increasing the speed of their feed from the ISP. Hence, why the ISP provided them with 3 or 4 separate connections.

After we installed this device, we were able to aggregate all the connections together and things run a lot quicker for them.

spiceuser-k0o0k · 2018-09-17T12:03:54.000Z

I didn’t fully understand what is the set up:
This tp link is connected to single dsl line, and to two additional modems/routers?

Greg-Starnes · 2018-09-17T12:11:20.000Z

You have 2 ISPs coming into the building on one line or you have 2 ISPs coming in the building on 2 lines? If is the second are you wanting to connect them to one router for failover?

reneduranona · 2018-09-17T12:17:56.000Z

It was the same ISP providing 4 identical/similar connections to the 1 building.

pbrain · 2018-09-17T12:42:51.000Z

This whole thread is starting to sound like “Who’s on first!”

da-schmoo · 2018-09-17T12:45:57.000Z

I don’t see how you can have two ISP’s on a single DSL circuit. Whoever runs the last mile (telco, whatever) has to route the traffic to a single destination (ISP).

shriverhelpdesk · 2018-09-17T13:00:12.000Z

So if you connect the DSL line to a modem then a router with 3-4 routing port and connect 3 lines to the router from the modem/dsl line then 2 consumer grade routers need to be connected to make 2 separate networks and configure separate subnets thne vlans as needed to provide the best service it should work. However it will have terrible connectivity and speed most likely if used together. Or get two separate lines so you can use them independently of each other and get the best of both (which your original ISP most likely left a second DSL line in case you decided you wanted more connections). So hopefully that works.

johnn1494 · 2018-09-17T13:03:50.000Z

spiceuser-k0o0k:

The motivation here: I have to pay for two different ISP’s (no matter what’s the reason. Another story…). And I have only one dsl line. So two ISP with single dsl is a fact.
I need a method for using them both (each ISP has its own benefit).
I thought something like:
Connect the dsl line to a bridge/switch.
Connect the bridge to Ethernet ports of two different modems. One for each ISP.
Will it work?

If you have 1 DSL line… Then you only need 1 router/firewall. I don’t know what the issue is here. a DSL line is a telephone line… it goes to a ISP (Internet Service Provider) or a (Telephone company). So if you buy a telephone line from lets say AT&T, how can you have another company on the same DSL line?

I think what happened is the 2nd ISP has a DSL line too… (a physically POTS line to plug into) and it may be in a closet or a basement sitting there and you need to have a 2nd physical cable run up to your modem/firewall so you can use both ISP’s?

Then you would need a router or firewall that could take 2 DSL connections into it… and then provide commands to logon and use each DSL modem.

da-schmoo · 2018-09-17T13:10:45.000Z

“So if you buy a telephone line from lets say AT&T, how can you have another company on the same DSL line?”

That’s definitely possible. In my area, you can have AT&T providing dial tone and DSL from another company on the same line - AT&T handles the physical connection and then just routes the traffic to the supported ISP of your choice. (well, it used to work that way - don’t have any customers using DSL any longer)

That said, you can only have one ISP per copper circuit.

reneduranona · 2018-09-17T13:21:18.000Z

Juanoflo:

This whole thread is starting to sound like “Who’s on first!”

https://youtu.be/kTcRRaXV-fg

Hahahahaha, I love those guys.

Robert762 · 2018-09-17T14:35:22.000Z

spiceuser-k0o0k:

A simple question:

I have a single DSL with two ISP’s.

I need your help with setting up my home network such that I can use different ISP’s with this single DSL.

I know you said it was a simple question, but do you have an IT Pro that can assist with this at home?

spiceuser-k0o0k · 2018-09-17T16:36:08.000Z

Hi,
I think I’ll manage.
I just need to know which components should I get and how to configure the system.

ericwood · 2018-09-20T17:44:43.000Z

So, for clarity’s sake here.

You have two different ISPs. You have one modem. You have one router. Is that correct? If so, who are the ISPs? I’ve never heard of two providers on one modem.

Or, do you mean two IPs?

As far as you thinking you’ll manage, I don’t know that that’s the case. You’re not presenting the question in a very good way at all. Please read this.