[c-nsp] network design question

[Brian Desmond]

All the major NIC brands (Intel, Broadcom, HPQ, etc) ship teaming
software at least on windows. On RedHat at least there's some docs to
make a "bond0" or "bond#" interface which does the teaming. I suspect
those vendors also have their own teaming SW for Linux as well, but I'm
a Windows guy. 

What happens is you plug the NICs into Switches A and B and set them up
for failover teaming - they send a little heartbeat every so often and
expect the other NIC to hear it. 

Thanks,
Brian Desmond
brian at briandesmond.com

c - 312.731.3132


> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-
> bounces at puck.nether.net] On Behalf Of Scott Granados
> Sent: Wednesday, September 06, 2006 3:11 PM
> To: Cisco-NSP Mailing List
> Subject: [c-nsp] network design question
> 
> Hi, I'm looking for some pointers on what technology or methods to use
> here.
> 
> 
> 
> I'm designing a new network for my company and have run in to a
problem
> which I'm sure a solution exists to address but I didn't know where to
> start.  I have two core switches (4506's) each with supervisor 4's
> (wsx4515) and each has 3 wsx4548 cards installed making a total of 144
> ports each.  Now, much of our architecture has several servers so for
> example, we might have 4 application servers.  My plan was to place 2
> on switch a and two on switch b so if either switch fails, I only lose
> part of my application serving ability.  However, suppose we have a
> master mysql server but it's only attached to switch a.  If switch a
> dies then the entire application dies as there is no path for data.
My
> servers all have 2 gig NIC's.  Would it be possible to attach the
mysql
> master to both A and B and use some method that allows either card to
> be reached by the same IP.  Clearly, having two ips would be simple
but
> our application does not have a means to connect to more than one DB.
> Is there a clean way that say switch A dies so then nic A no longer
> functions so nic B takes the remaining traffic left on switch B headed
> for the same ip of the database master?  What are people using for
fail
> over in the event of switch failures?
> 
> 
> 
> Thanks
> 
> 
> 
> 
> 
> G. Scott Granados
> 
> Sr. Network Operations Specialist
> 
> OFFICE: 415-946-2112 EXT. 222
> 
> CELL: 408-569-4017
> 
> URL: http://www.jeteye.com
> 
> 
> 
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