Facility wide DR/Continuity
woody at pch.net
Wed Jun 3 12:47:13 CDT 2009
On Wed, 3 Jun 2009, Drew Weaver wrote:
> Should the additional sites be connected to the primary site
> (and/or the Internet directly)?
Yes, because any out-of-band synchronization method between the servers at
the production site and the servers at the DR site is likely to be more
difficult to manage. You could do UUCP over a serial line, but...
> What is the best way to handle the routing? Obviously two devices
> cannot occupy the same IP address at the same time, so how do you
> provide that instant 'cut-over'?
This is one of the only instances in which I like NATs. Set up a NAT
between the two sites to do static 1-to-1 mapping of each site into a
different range for the other, so that the DR servers have the same IP
addresses as their production masters, but have a different IP address to
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