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Microsoft® Lync® Server 2013 Unleashed Second Edition by Randy Wintle, Alex Lewis, David Ross, Tom Pacyk

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Redirects

The main advantage to a Director for internal users is to provide the user’s primary and backup registrar information. This way, a client knows exactly which server to contact next if it is unable to contact the primary server. This information can be viewed within the SipStack traces of a sign-in. After the client authenticates, the Director responds with a 301 Redirect message, and informs the client of the primary and backup registrar. This first sample sign-in shows a user attempting a registration to the Director:

Start-Line: SIP/2.0 301 Redirect request to Home ServerFrom: <sip:tom@companyabc.com>;tag=45a7e6cf7b;epid=9671160f70To: <sip:tom@companyabc.com>;tag=CED5D09DABBD634B55450D19A37449C4CSeq: ...

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