[c-nsp] SLB Question

[Paul Stewart]

Thanks.... there's a lot of other servers in the same subnet (layer2
adjacent as well) and they must be able to talk....  that confirms what I
thought I was understanding from the docs...

We can of course do this server level...;)  

My last question would then be if we ran NAT with SLB then the servers
having to cross layer3 comes out of the equation correct... because with
NAT, there would be a translation happening which would handle the actual
SLB portion?

Thanks again,

Paul
 

-----Original Message-----
From: Robert Blayzor [mailto:rblayzor at inoc.net] 
Sent: Wednesday, July 11, 2007 11:04 AM
To: Paul Stewart
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] SLB Question

Paul Stewart wrote:
> Is there a way to have SLB answer a virtual address that is forwarded 
> to the real IP of *one* of the servers while maintaining an 
> active/standy configuration?  The docs only talk about load balancing
itself.....

Sorry, forgot to answer the second part of this...

Yes, you can do active/standby.  You can create a primary server farm with
one IP and then a backup server farm with the other IP.  When creating your
virtual server address you can specify the primary and backup server farms.

But this assumes your SLB works correctly with L3 hops.  COnnections coming
in via L3 hops will be load balanced, anything directly layer2 adjacent on
the same subnet will not be load balanced.

-Robert