I want to set up IIS 5 on a T1 and DSL line for redundancy. I have
done the following configuration which seems to work.
The IIS 5 (Windows 2000) server has 2 network interfaces. One
interface is plugged into a switch which goes into the router which is
on the T1 side, the other interface is plugged into a switch which
goes into the DSL side. Each interface is assigned 2 IP addresses. The
T1 connected interface has 10.0.0.101 and 10.0.0.102 as it uses NAT.
These IPs are NAT'd by the router to our public IP addresses. The DSL
side interface is directly assigned 2 public IP addresses (ie. 1.2.3.4
and 1.2.3.5).
In IIS configuration, we have 2 websites, the first is bound to
10.0.0.101 and 1.2.3.4 and assigned the host header name of
websiteone.ourdomain.com. The second website is bound to 10.0.0.102
and 1.2.3.5 assigned the host header name of websitetwo.ourdomain.com.
Both of these websites also run SSL so that is set up as well, this is
the reason why I do not have them on the same IP.
DNS is configured round-robin, to sometimes give one IP and sometimes
give the other IP for each of the websites.
All of this seems to work, but I am wondering if there is a better way
to set it up. We have recently purchased a new web server which runs
Windows 2003 with IIS 6, and I would like to set it up so that it is
also load balancing/redundant.
I hope I have been clear - any help or advice is much appreciated!!
Thanks