[sllug-members]: Multiple DSL Lines

[Adam Barrett]

Great info so far.

I guess more detail will help.

I am running two servers (currently) hosting a couple of small
domains, however, I hope to increase my overall bandwidth (up mostly)
to the servers as one of my sites continually maxes the single DSL
line I have now.

I would love for the two lines to act as 1 (1 IP etc) but then I am
not terribly worried about that either, I can split the two current
servers to each line if need be.

What I really want to know is if this will help my overall traffic to
the sites? In other words, if someone starts a massive download on the
first line will other people be able to connect to the same server on
the other line and still see decent speeds?

Thanks again for all that everyone has helped with so far, I hope this
will come in handy for more people as Fiber is not yet an option to
about 80% of this valley, and the other options are not grand either.

On 12/12/06, Mac Newbold <mac at macnewbold.com> wrote:
> Today at 4:41pm, Corey Edwards said:
>
> > On Tue, 2006-12-12 at 16:06 -0700, Adam Barrett wrote:
> >> Has anyone here had experience in support multiple DSL lines?
> >
> > Yes. I have one location which has 11 DSL lines and we're trying to get
> > 4 more added.
>
> Wow.
>
> >> I am looking at getting a second line and using a Linksys RV042 with
> >> dual WAN connect to get a second line.
>
> I'm in a similar situation, and even looked at the same hardware. Our
> problem is up and down though - we're stuck in in a building that can't
> get faster than 1.5Mbit DSL.
>
> >> Would doing this help my upload speeds? That is the real crunch I am
> >> in, I am capped at 768K and I am hitting it.
> >
> > That should work just fine as long as the DSL lines are from the same
> > ISP. With upload traffic, your router gets to decide which interface to
> > send packets out on so it can do whatever kind of load balancing you
> > want. The reason to use the same ISP is that many (hopefully most, but
> > unfortunately not all) will refused to send out packets from an IP
> > address that shouldn't be on their network. They do that to prevent DOS
> > attacks mainly, but it's just good practice in general.
>
> One thing to note is that since they're not "bonded", they'll have
> different IP addresses on the other end, and so traffic on a TCP
> connection for example will most likely come back to the same IP it came
> from. If you're running a server behind it, your DNS will point at only
> one of the two incoming IPs generally, so all the incoming will hit the
> same line. Each connection, once started, will be tied to a particular
> line, and no connection will be able to use both lines. So if you're
> trying to do a single really big upload or download, you'll still see the
> same performance you do now on that transfer. But any other transfers will
> see much better performance unless they're already tied to that same link.
> Anything starting up after the one link is tied up will generally use the
> other (unless it is an incoming connection, in which case the balancer
> won't have a say in it).
>
> > Qwest will be happy to supply you with more DSL lines, as long as they
> > have facilities. For your two that shouldn't be an issue because you
> > probably have two phone lines coming into the building.
> >
> > So yeah, it should be possible. To load balance incoming traffic you'd
> > need an ISP with a real clue. It would help in this case too, but you
> > can probably get away with it without.
>
> AFIAK, XMission qualifies on that account. I've seen them work with people
> who wanted multiple lines for redundancy, and helped them get set up with
> BGP and stuff so they can have their own AS and do real routing, and have
> their address block advertised on both ends.
>
> Thanks (and thanks in advance) to anyone who contributes to this thread!
> I'm very interested in the possibilities. Adam, I hope you'll let us all
> know how it goes if/when you set this up.
>
> Thanks,
> Mac
>
> --
> Mac Newbold             MNE - Mac Newbold Enterprises, LLC
> mac at macnewbold.com      http://www.macnewbold.com/
> ______________________________________________________________________
> See http://www.sllug.org/ for latest SLLUG news, information, links.
> Join SLLUG and other UT LUG members on irc.FreeNode.net channel #Utah
> sllug-members at sllug.org
> http://www.sllug.org/cgi-bin/mailman/listinfo/sllug-members
>


-- 
Adam Barrett
dragen at gmail.com