Loadbalance caching dns server

[Daniel McDonald]

On 3/20/12 7:15 AM, "trm asn" <trm.nagios at gmail.com> wrote:

> 
> 
> On Tue, Mar 20, 2012 at 4:40 PM, Stefan Certic <stefan at routotelecom.com>
> wrote:
>> Hi,
>> 
>> That can be achieved using iptables:
>> 
>> iptables -A PREROUTING -i eth0 -p tcp --dport 53 -m state --state NEW -m nth
>> --counter 0 --every N --packet 0 -j DNAT --to-destination 192.168.1.98:53
>> <http://192.168.1.98:53>
>> 
>> On Tue, Mar 20, 2012 at 10:11 AM, trm asn <trm.nagios at gmail.com> wrote:
>>> Dear List,
>>> 
>>> Is there any mechanism to load balance Caching-DNS server. For example..
>>> 
>>> _
> 
> Requirement is slightly different.
> 
> The client's request can go to any of the Caching server. If one of the
> Caching server down, then also it should serve the request from 2nd server. Is
> there any way where I can configure the VIP and that VIP will communicate to
> the down stream both the caching dns server. So the client will be configured
> with VIP in resolve.conf file.


Multiple vips with a single serverfarm (or multiple anycast vips with
multiple serverfarms) are fairly trivial to set up with a hardware load
balancer  I have configured this using Cisco ACE, F5, and A10 AX2500.

-- 
Daniel J McDonald, CCIE # 2495, CISSP # 78281