[OpenSER-Users] Failover using NAPTR/SRV

[Bogdan-Andrei Iancu]

Of course it is.....by IETF  - see RFC3263.

4.3 Details of RFC 2782 Process


Regards,
Bogdan


Douglas Garstang wrote:
> Well that's weird. What do you mean by 'fail'? I thought dns_blacklist 
> was used when a 503 response was received? What if the connection 
> times out? What if another negative reply is received? Is this stuff 
> documented anywhere?
>
> ----- Original Message ----
> From: Bogdan-Andrei Iancu <bogdan at voice-system.ro>
> To: Tobias Lindgren <tobias.lindgren at ip-only.se>
> Cc: users at openser.org
> Sent: Thursday, February 14, 2008 3:25:33 AM
> Subject: Re: [OpenSER-Users] Failover using NAPTR/SRV
>
> Hi Tobias,
>
> if you have "dns_backlist=yes" in your config, if one of the destination
> server fails (according to SIP definition), it's IP will be added to a
> temporary blacklist (for 4 minutes) and not used. So, openser should do
> dns-based failover and use the next entry provided by NAPTR/SRV/A lookup.
>
> Regards,
> Bogdan
>
> Tobias Lindgren wrote:
> > Hi all,
> >
> > I've been trying to find this information but I cannot find any exact
> > specifications on how it really works.
> >
> >  >From what I know using NAPTR/SRV records with OpenSER will allow 
> it to
> > find and use servers behind those DNS-records. This works just fine.
> >
> > However, what I'm not sure about is what actually will happen in 
> OpenSER
> > when one of two servers in this scenario would fail.
> >
> > For example, I have two servers as SRV where one is primary and one is
> > secondary for SIP/UDP. What will happend in OpenSER when the primary
> > server is down? Will OpenSER continue to send all request first towards
> > that server or will it learn that one server is down and always send
> > requests to the second server for a period of time and try the primary
> > one just occassionally?
> >
> > Please direct me to any page where this is explained in detail, if such
> > page exists.
> >
> > Br,
> > /Tobias
> >
> > _______________________________________________
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> > Users at lists.openser.org <mailto:Users at lists.openser.org>
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> >
> > 
>
>
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