From owner-freebsd-isp  Thu Oct 26  7: 5: 6 2000
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Date: Thu, 26 Oct 2000 08:04:57 -0600 (MDT)
From: Nick Rogness <nick@rapidnet.com>
To: Sven.Huster@t-online.de
Cc: freebsd-net@freebsd.org, freebsd-isp@freebsd.org
Subject: Re: high availability by routing?
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On Thu, 26 Oct 2000, Nick Rogness wrote:

> On 26 Oct 2000 Sven.Huster@t-online.de wrote:
> 
> > hi there,
> > 
> > at the moment i have following setup:
> > 
> > |isp| --- |my router| -- |switch| -- |loadbalancer| -- |web farm|
> > 
> > i want to improve availability by adding a second loadbalancer and 
> > a second router + a second connection to my network provider to
> > eliminate the single point of failure (i know about the single
> > switch).
> > 
> > so the setup then will be:
> > 
> > |   | -- |router 1| -- |      | -- |loadbalancer 1| -- |        |
> > |isp|                  |switch|                        |web farm|
> > |   | -- |router 2| -- |      | -- |loadbalancer 2| -- |        |
> > 
> > but
> > 1. how is routing managed between isp and my routers?
> 
> 	Work with them to run some type of routing protocol.  It will
> 	probably be an IRP (I'm assuming you don't have an AS #)
> 
> > 2. what happends if one router fails or one isp connection is broken?
> 
> 	It should switch over to the other.
> 	
> > 3. how does the loadbalancer recongnizes that one router fails?
> 
> 	The load balancer doesn't.  That's the routers job.

	Have 2 default gateways...or run some type of failover on the
	routers...like HSRP.  If it is not a cisco router, then you will
	needs some type of High Availability software.  You could also run
	routing daemons on your loadbalancer machines?


Nick Rogness
- Drive defensively.  Buy a tank.




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