Cisco ACE config for internal DNS load balancing

[michoski]

On 3/9/12 8:39 AM, "Phil Mayers" <p.mayers at imperial.ac.uk> wrote:

> On 09/03/12 16:23, Matthew Huff wrote:
>> Anyone have any suggestions/best practices/config examples for DNS load
>> balancing for internal use on CISCO ACE blades?
>> 
>> I¹ve got the standard example working, but wondered about keepalive
>> frequency, timeouts, fragments, etcŠ
>> 
>> Anyone got any examples they use that they could share?
> 
> We do transparent LB; the servers all have the service VIP as a /32 on
> their loopback interface. The packet flow is:
> 
> Req: client -> ace -> dns server
> Rsp: dns server -> client
> 
> This has the advantage that the DNS servers don't have to sit "behind"
> the ACE.

+1 -- Some times called "DSR" or "Direct Server Return", I consider it the
only way to configure sites/services of any significant size.

-- 
All his life he has looked away... to the horizon, to the sky,
to the future.  Never his mind on where he was, on what he was doing.
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