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@voice-system.ro To: Tobias Lindgren tobias.lindgren@ip-only.se Cc: users@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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