Coyote Point Systems Equalizer GX Series, Administration Manual

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Automatic Cluster Responders
Automatic Cluster Responders
Note -Responders are not supported on E250GX model Equalizers.
A Responder is a server-like object that can be associated with a Match Rule. It provides you with
the ability to cleanly load balance traffic where server pools associated with a cluster are not
available to satisfy a client's request. The feature extends Cluster Match Rules to allow them to
specify a target Responder which is used to provide a response to the client when the server pool
in the match rule is not available. If an incoming request matches a Match Rule expression and
the server pool specified in the Match Rule is down, a Responder definition in the Match Rule (if
present) tells Equalizer to send one of two automatic responses to the client:
l
A customized HTML “sorry page”
that can, for example, ask the client to retry later or go to
another URL.
l
A standard HTTP Redirect response that specifies a return code and redirect URL. When the
client receives this page, it is automatically redirected to the redirect URL. Redirect pages
can be configured to use parts of the request URL in the HTTP Redirect response (using a reg-
ular expression).
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