How to refuse traffic to one NLB host

  • Thread starter Thread starter Clifford
  • Start date Start date
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Clifford

Hi,

Can anyone tell me if it is possible to refuse traffic
host A as long as host B is up, and have host A accept
traffic ONLY when host B goes down?

Thank you.

Clifford
 
Hi Clifford -

This is called "Failover" or "Single Host" filtering in NLB. To configure
NLB to load-balance this way, you have to edit the port rules in the NLB
properties. Change the filtering mode on the applicable port rule from
"Multiple Hosts" (the default) to "Single Host" - you must do this on ALL of
your NLB hosts - and set a unique handling priority. The active host with
the lowest handling priority will take 100% of the applicable traffic - for
example, host A. If host A dies, and host B has the next lowest handling
priority, host B will pick up 100% of the applicable traffic. Note that if
host A comes back alive, the traffic would then shift back to host A, as it
would be the active host with the lowest handling priority.

Make sense?

Cheers, Sean
 
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