[NTLUG:Discuss] Load/Network Balancing NICs?

[sysmail@glade.net]

Hi, thought I would jump in here.

I think you have two problems to solve - high availability services, and
redundant, load-sharing routing.  One involves programs you run on your
computer(s), the other involves informing the world how you wish data
directed to your site.

I can't claim to be an expert on this, but I am planning to read a man
page or two.  I think the solution you seek is a registered AS (Autonomous
System) number which you will use in conjuntion with BGP to maintain your
routes with your two or more ISPs.

You can use a single subnet, and even just a single IP address on your
machine.  The subnet will just route through either of the two backbone
providers.

Or, solve the problem a different way.  If you don't need the bandwidth of
dual leased lines, get a SONET ring circuit for redundancy to an ISP that
runs BGP on multiple backbone connections.

Or, if you want to do this via dial-up, co-locate a Linux box at your ISP,
get two ISDN lines at each end, and I believe if you define dual default
gateways either connection will carry the load if the other fails.  We do
that on one of our Cisco boxes, which shares two T-1s to a single router
on the remote end.  I assume it would work under Linux - RIP would handle
the much simpler route management, too.

Just my twenty millibucks worth,

Carl

-- 


=====================================================

Carl Haddick
sysmail at glade.net
GladeNet Communications

On Wed, 14 Mar 2001, Scott Womer wrote:

> Yes...  clustering is definately the answer for the web servers, I was on
> the TurboCluster beta team for about a year, I've tested HA, LVS, and
> Piranha... I'm currently leaning towards Piranha which is basically LVS with
> a management console added to it.
>
> But...  my dilemma is the dual ISPs....  in essense I need to cluster two
> networks that are connected to two different providers with different
> networks and subnets.  Maybe I'm missing some simple concept and the two
> networks aren't really an issue, but right now... I can't see the answer.
>
>
>
> Thanks,
> Scott Womer
>
> ----- Original Message -----
> From: "Chris Cox" <cjcox at acm.org>
> To: <discuss at ntlug.org>
> Sent: Tuesday, March 13, 2001 9:54 PM
> Subject: Re: [NTLUG:Discuss] Load/Network Balancing NICs?
>
>
> > Clustering is the right answer here.... I will throw out
> > Mosix as something to look at:
> > http://www.mosix.cs.huji.ac.il/txt_main.html
> >
> > Scott Womer wrote:
> > >
> > > Hiya Peoples!
> > >
> > > I'm building up what will become a mission-critical web site at my
> company.
> > > I'm setting up a fault tolerant infrastructure, dual ISPs, dual routers,
> > > dual firewalls, dual switches and clustered web servers.  I know I can
> use
> > > simple round-robin DNS to mathmatically balance the load across ISP
> networks
> > > and web servers, but what I'd like to be able to do is take advantage of
> the
> > > available fault tolerance of the ISP networks, meaning... if one ISP
> goes
> > > down, or even a router or firewall, etc... etc... and be able to
> > > automatically redistribute the load to the available connection.
> > >
> > > I know there's hardware out there to accomplish this, but I'd prefer to
> > > provide a linux solution.
> > >
> > > Any ideas?  Known solutions?
> > >
> > > Thanks,
> > > Scott Womer
> > >
> > > _______________________________________________
> > > http://ntlug.org/mailman/listinfo/discuss
> > _______________________________________________
> > http://ntlug.org/mailman/listinfo/discuss
> >
> >
>
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