----- Original Message ----- From: "Arnd Vehling" av@nethead.de To: "Andres" andres@telesip.net Cc: "Klaus Darilion" klaus.mailinglists@pernau.at; "Nils Ohlmeier" nils@iptel.org; serusers@lists.iptel.org Sent: Thursday, February 26, 2004 3:11 PM Subject: Re: [Serusers] replication and rtpproxy
Andres wrote:
We use DNS updates.
So, whats the expire setting in your zonefile?
5 minutes
One issue here could be
that some large ISPs doesnt honor small expire settings in zone-files and clients using such a dns resolver _wont_ get an updated ip-address but get hung on the old one.
That is a possibility, But so far we have not encountered it and we have clients in 10 countries. In any case if it works for only 95% of customers then we will be quite happy. So far it has worked for 100% of our customers.
We have special scripts based on sipsak (Thanks Nils!), that check all SIP servers every minute.
So failover time is one minute?!
Yes. But the DNS expire time is 5 minutes so I would go by the higher number.
If something is wrong, then we update our DNS dynamically to point to another SIP Server. If the UAs
are
unable to register then they redo their DNS query
Youre _sure_ that every UAC will do this? With wich UACs did you test
this? We only support 3 UACs on our network. ATA, BT, SPA and it works on all 3.
best regards,
Arnd