[c-nsp] network design question

[omar parihuana]

Hi,

you can use bonding configuration, we have a DNS server (on CentOS)
with two diferent cards (one 3COM and other Intel) both are working as
bonding and load balancing and using one IP Address and two differents
switchs (3550)

We based our config in the follow document:

http://www.redhat.com/docs/manuals/csgfs/browse/rh-cs-en/s1-hardware-connect.html
 (see: 2.5.1. Configuring Ethernet Channel Bonding)


Rgds.


On 9/6/06, Scott Granados <sgranados at jeteye.com> wrote:
> 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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-- 
Omar E.P.T
-----------------
Certified Networking Professionals make better Connections!