Subject: [SIP] SIP Proxy / Registrar Redundancy

From: Buettner Werner <[email-masked]>
Date: Wed, 28 Mar 2001 19:07:53 +0200

Hello All

I have the following query.  

If I want to have a SIP server which acts as Proxy with Co-Located Registrar.  But, together with all of this, a certain level of redundancy is needed.  What I envisage is to have two or three such servers which should somehow keep consistent databases (in a certain domain).  User profiles are stored in LDAP, but contact info and time to live stamps will have to be stored locally, since LDAP write access is very slow.  What is important is that both outgoing SIP INVITES and also incoming SIP INVITES (which may go to different servers) are correctly handled.  

Which possibilities exist to have this type of redundancy?  I have not found any documentation describing this.  Any info is kindly welcomed.

Kind Regards

Werner Büttner

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