No...our SIP server DNS entries time out at 5 minutes. It does not matter where the entry is cached. Unless it is cached by someone who ignores our TTL...but that has not been the case so far.
----- Original Message ----- From: "Klaus Darilion" klaus.mailinglists@pernau.at To: "Andres" andres@telesip.net Cc: "Nils Ohlmeier" nils@iptel.org; serusers@lists.iptel.org Sent: Thursday, February 26, 2004 12:54 PM Subject: Re: [Serusers] replication and rtpproxy
But this will work only if the client uses your DNS servers, because the DNS entries are cached by the other nameservers - or do you have a very short TTL configured?
I think also softclients will have problems as Windows XP by default caches the DNS lookups.
regards, klaus
Andres wrote:
Hi Klaus,
We use DNS updates. We have special scripts based on sipsak (Thanks
Nils!),
that check all SIP servers every minute. 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 and find the new IP. Works quite well in combination with replication since the backup server
has
the exact duplicate location table.
Regards, Andres
----- Original Message ----- From: "Klaus Darilion" klaus.mailinglists@pernau.at To: "Nils Ohlmeier" nils@iptel.org Cc: serusers@lists.iptel.org Sent: Thursday, February 26, 2004 9:59 AM Subject: Re: [Serusers] replication and rtpproxy
Nils Ohlmeier wrote:
On Thursday 26 February 2004 03:28, Arnd Vehling wrote:
Next question :) Is there any way that a failover server pickups the neccessary port bindings for portaones rtpproxy or do will all "rtpproxied" sessions fail when a failover server will take over a primary server?
As currently the rtp-proxy has to run on the same host as SER it does
not make
much sence IMHO to think about taking over rtp-proxy sessions. Then you
would
need some kind of rtp-proxy session replication, which should be easy
when
the nathelper module and the rtp proxy ever uses IP protocol for communication. But all this will only work if the backup server takes
over
the IP of the failed server, and you are not using SRV backup servers
for
example (except that a SRV backup can obviously also can takeover the
IP).
Is it yet possible to build redundancy on top of SRV? I tested some clients (Xlite, Budgetone-100, Windows Messenger 4.7) wether they use SRV records to locate the proxy and Messenger is the only one who uses
it.
So, if I use these clients, is there any other failover solution than IP takeover?
regards, klaus
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-
Andres