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Re: redundancy via DNS

":yegon" <yegon@yegon.sk> writes:

> we have several servers colocated with several ISP's
> i am trying to sort out some configuration that would ensure good uptime for
> customers

We're helping a customer with a similar situation.  They have multiple
incoming Internet connections.  What we plan to do:

- Have a DNS server for each Internet connection
- Servers are replicated/available via every connection
- Each DNS server gives out IPs only within it's subnet

This way if one of the connections go down, that DNS server becomes available
and those IPs stop being handed out ... effectively removing those IPs from
your DNS rotation and automatically failing over to the remaining
connections.  This also provides a load balancing effect.


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