North American Network Operators Group

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Re: Anycast and windows servers

  • From: Robert Boyle
  • Date: Fri Feb 20 08:35:57 2004

At 05:43 AM 2/20/2004, you wrote:
Hence the reason why I want the route to cease being advertised if the box

I'm trying to avoid putting yet another server load balancer box in front
of the windows box to withdraw the route so a different "working" box will
be closest.  It may be an oxymoron, but I'm trying to make the windows
service (if not a particular windows box) as "reliable" as possible
without introducing more boxes than necessary.
You haven't said what type of service you want to make as reliable as possible. It sounds like you want to use clustering or network load balancing. With clustering, you can have the service present on both machines and if the link between the two fails or if the service on the primary machine fails, the second machine will take over. You can also use shared Fiber-channel or SCSI devices between the two servers. You can also use network load balancing to share a non-transaction based service between servers. If you do it this way, you will get automatic load balancing to double the speed and capacity between the two or more servers in the NLB cluster since they all service requests all the time. In both cases, you will create a virtual IP address which receives all connections and both machines in the cluster will determine which machine handles each connection. This isn't hard and we do it all the time.


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