Re: FreeBSD router two DSL connections

On Sun, Dec 11, 2005 at 11:28:17PM -0800, Ted Mittelstaedt wrote:
>
> If both DSL lines go to the same ISP it is easy, run
> PPP on them and setup multilink PPP. The ISP has to
> do so also.
>
> If they are going to different ISP's then you cannot
> do it with any operating system or device save BGP - the idea is
> completely -stupid- to put it simply. If you think different,
> then explain why and I'll shoot every networking scenario
> you present so full of holes you will think it's swiss cheese.
> And if you think your going to run BGP I'll shoot that full
> of holes also.

I strongly disagree. There are many reasons for this. Two of which are
increased throughoutput and redundancy. The primary problem is that you
need to make sure outgoing data for a connection is using the same line
as the incoming connection. If the majority to all connections are
outgoing and both lines use NAT and have unique IP addresses, it's
simpler to setup. If you have incoming connections as well, either only
one of the two lines will be used or you'll need BGP or some kind of
static route setup by the two ISPs. For an internet cafe, most
connections will probably be outgoing so it won't be a problem.


I have done this with a Linux router and using Comcast Cable and
SpiritOne DSL. We had all incoming connections use DSL and outgoing
connections use either line. We balanced them by internal IP addresses,
but there might be more sophisticated methods. I do not know what
support FreeBSD has for this kind of routing though. At the very
minimum, you could get redundancy for outgoing connections by switching
the route to use the other line when the first one fails.

>
> Note that Steven's scenario below is for 2 circuits that
> both start at a single entity, and both end at a single entity.
>
> Ted
>
>
> >-----Original Message-----
> >From: owner-freebsd-questions@xxxxxxxxxxx
> >[mailto:owner-freebsd-questions@xxxxxxxxxxx]On Behalf Of Yance Kowara
> >Sent: Sunday, December 11, 2005 7:03 PM
> >To: freebsd-questions@xxxxxxxxxxx
> >Subject: FreeBSD router two DSL connections
> >
> >
> >Hi all,
> >
> >I am trying to figure out if *BSD can achieve this:
> >
> >I have two DSL connections to play with, and I would
> >like to configure a *BSD router that can combine the
> >two DSLs together.
> >
> >There is a howto at
> >http://stevenfettig.com/mythoughts/archives/000173.php
> >
> >But it concerns OpenBSD and it was for a T1 connection
> >using a dual T1 card. I would like to configure one on
> >2 DSLs connected to two individual NICs.
> >
> >Is this feasible at all, or should I just invest in a
> >dual Wan hardware?
> >
> >Kind regards,
> >
> >Yance
> >
> >__________________________________________________
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