I'd argue that even *IF* name resolution became increasingly common, that changing defaults would tend to break existing configs and is not something that should be done lightly. In this case, general practice is to handle the failure in the script logic on branch failure, and so the feature is disabled. If it was decided that the default were to be changed in 5.8, how many deployments would break as a result of this?
If this was a greenfield new piece of software, I think that having DNS failover enabled by default might not be a bad decision. But this isn't net-new software. It's something that has existing expectations. -----Original Message----- From: Olle E. Johansson <[email protected]> Sent: Wednesday, August 23, 2023 1:54 AM To: Kamailio (SER) - Users Mailing List <[email protected]> Cc: Silvan Nagl <[email protected]> Subject: [SR-Users] Re: use_dns_failover default value CAUTION: This email originated from outside the organization. Do not click links or open attachments unless you recognize the sender and know the content is safe. I agree with Daniel here. Within the platforms we rarely use DNS as most systems are fixed (not moving around, have a permanent IP address) and we handle failover and load balancing using solutions like the Kamailio dispatcher. >From the client side, like softphones or desktop phones, I personally use a >lot of DNS to find the first hop SIP server. This way I can manage the >clients, control load balancing, provider failover and make sure they always >reach the service. Cheers, /O > On 22 Aug 2023, at 21:14, Daniel-Constantin Mierla <[email protected]> wrote: > > Hello, > > DNS-based routing is not very common in telecommunications, most of > the interconnects being done based on IP routing and IP-trusted rules. > Because DNS is usually a blocking operation that involves network > communication (therefore can introduce delays), many of the dns > features are turned off by default. When one has to build a system > that relies significantly on DNS-based routing, those features can be > turned on via config. > > Cheers, > Daniel > > On 22.08.23 17:07, Silvan Nagl wrote: >> Hi, >> >> I would like to know the reason for having "off" as default value for >> use_dns_failover. >> https://git/ >> hub.com%2Fkamailio%2Fkamailio%2Fissues%2F3547&data=05%7C01%7Cbkaufman >> %40bcmone.com%7C5cd1830270534a45fd9708dba3a7652d%7Cafc1818e7b68485689 >> 13201b9396c4fc%7C1%7C0%7C638283711594119946%7CUnknown%7CTWFpbGZsb3d8e >> yJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3 >> 000%7C%7C%7C&sdata=4GaP2jVvIMMFXi1f5nWMRt3KF6F723rPZUbNuDzyU%2Bw%3D&r >> eserved=0 >> >> Greetings, >> Silvan >> > -- > Daniel-Constantin Mierla -- > http://www.a/ > sipto.com%2F&data=05%7C01%7Cbkaufman%40bcmone.com%7C5cd1830270534a45fd > 9708dba3a7652d%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C6382837115 > 94119946%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiL > CJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=8fi7fgZqNKMbb67Vm7 > X0TlI1B5BGk8QzS5kiiE3WvPw%3D&reserved=0 > http://www.t/ > witter.com%2Fmiconda&data=05%7C01%7Cbkaufman%40bcmone.com%7C5cd1830270 > 534a45fd9708dba3a7652d%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C63 > 8283711594119946%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV > 2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=5g6rGiCfkG > Yrd7l5XnJdjqNbzL27pnax3WdoSksHThU%3D&reserved=0 -- > http://www.l/ > inkedin.com%2Fin%2Fmiconda&data=05%7C01%7Cbkaufman%40bcmone.com%7C5cd1 > 830270534a45fd9708dba3a7652d%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C > 0%7C638283711594119946%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJ > QIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=8tVs > EpkONunTFeq1KJdn4FPCXWUhm2vEpIsOmAuEMSU%3D&reserved=0 > Kamailio World Conference - > http://www.k/ > amailioworld.com%2F&data=05%7C01%7Cbkaufman%40bcmone.com%7C5cd18302705 > 34a45fd9708dba3a7652d%7Cafc1818e7b6848568913201b9396c4fc%7C1%7C0%7C638 > 283711594119946%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2 > luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=PjA3NmvxI9E > 7l88a7nux21mHdnRs0ajPDxUTShKrvds%3D&reserved=0 > > __________________________________________________________ > Kamailio - Users Mailing List - Non Commercial Discussions To > unsubscribe send an email to [email protected] > Important: keep the mailing list in the recipients, do not reply only to the > sender! > Edit mailing list options or unsubscribe: __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to [email protected] Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe: __________________________________________________________ Kamailio - Users Mailing List - Non Commercial Discussions To unsubscribe send an email to [email protected] Important: keep the mailing list in the recipients, do not reply only to the sender! Edit mailing list options or unsubscribe:
