[c-nsp] IOS device failover

[Arie Vayner]

If you have only 2 servers (primary and backup) you could use SLB, with
a backup serverfarm - it would send all sessions to the active server
(primary) only, and would fallback to the backup server only if all
(i.e. only) primary server goes down. It would not be as easy with more
than 2 servers, but then it would require you to replicate them...

Arie 

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Tim Devries
Sent: Friday, March 04, 2005 6:06 PM
To: 'Dave Temkin'; cisco-nsp at puck.nether.net
Subject: RE: [c-nsp] IOS device failover


The problem is that this is a DB server and we want to avoid SQL
replication (and all the attendant issues this creates).  So therefore I
don't actually want to load balance, I just want the server to be
available if the other fails.  In CSS terms this is called a
sorryserver, but a cursory review of this document doesn't show any
similar capability (that I could find).

I'll keep reading.

Thanks,

Tim

-----Original Message-----
From: Dave Temkin [mailto:dave at ordinaryworld.com]
Sent: Friday, March 04, 2005 11:48 AM
To: Gert Doering; Tim Devries
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] IOS device failover


Gert/Tim,

There's always IOS server load balancing, depending on the platform and
IOS...

http://www.cisco.com/en/US/customer/products/sw/iosswrel/ps1833/products
_fea
tu
re_guide09186a0080080fd2.html

On Fri, 4 Mar 2005 16:40:36 +0100, Gert Doering wrote
> Hi,
> 
> On Fri, Mar 04, 2005 at 11:29:16AM -0400, Tim Devries wrote:
> > I am wondering if there is currently a feature in IOS that will let
me
do
> > the following:
> > 
> > If server A fails, I'd like traffic to be redirected to server B.
> 
> If the servers are cooperating, you could do it with VRRP (or some
sort
> of dynamic routing) on the server side.
> 
> Otherwise, I don't know a way to do it in IOS (but this doesn't mean
> that there is none - I've never needed to find out).
> 
> gert
> -- 
> USENET is *not* the non-clickable part of WWW!
>
//www.muc.de/~ger
t/
> Gert Doering - Munich, Germany                             
gert at greenie.muc.de
> fax: +49-89-35655025                        gert at net.informatik.tu-
muenchen.de
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David Temkin
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