Microsoft KB Archive/269165

= &quot;Proxy Chain Loop&quot; Error Message Using Proxy Server and NLB =

Article ID: 269165

Article Last Modified on 10/31/2006

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APPLIES TO


 * Microsoft Proxy Server 2.0 Standard Edition
 * Microsoft Windows NT Load Balancing Service

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This article was previously published under Q269165



SYMPTOMS
After you install Network Load Balancing (NLB) with Proxy Server 2.0, you may receive the following error message in your browser:

Error 12206 proxy server has detected a proxy chain loop

You may also notice in Task Manager that the Inetinfo.exe process has high CPU usage.



CAUSE
The NLB virtual IP address is being used for intra-array communications. All array traffic is load balanced and may end up being routed back to the Proxy server from which it was sent.



RESOLUTION
Configure intra-array communications to take place over the dedicated IP address:
 * 1) In IIS Internet Services Manager, right-click Web Proxy, and then click Properties.
 * 2) Click the Routing tab, and then click Advanced in the Routing Within Array section.
 * 3) Modify the Intra-Array Communications section to reflect the dedicated IP address of the Proxy server. You can type this information manually, or click Auto-Detect to see all the available IP addresses.
 * 4) Click OK, and then click OK.



MORE INFORMATION
For additional information, click the article number below to view the article in the Microsoft Knowledge Base:

238524 Using Cache Array Routing Protocol with Windows NT Load Balancing Service

Additional query words: nlb wlbs convoy proxy

Keywords: kbnlb kbprb KB269165

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