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Forefront TMG detected a proxy server loop

Forefront TMG detected a proxy server loop

 
Summary:
Forefront TMG detected a proxy server loop. There may be a problem in the configuration of the Forefront TMG Web chaining policy. Alternatively, in Enterprise Edition, when CARP is enabled and there are intermittent interruptions of intra-array connectivity, array member A may forward a request to array member B according to the CARP algorithm, and array member B may forward the request to array member A in an endless loop.

Causes:
There may be a problem in the configuration of the TMG Server Web chaining policy. Alternatively, in Enterprise Edition, when CARP is enabled and there are intermittent interruptions of intra-array connectivity, two array members may have different views of which array members are available. As a result, array member A may forward a request to array member B according to the CARP algorithm, and array member B may forward the request to array member A in an endless loop.

Resolutions: