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<DIV>Keep in mind that you are talking about a very rare event – total loss of a
data center or connectivity to it. Even if you have to manually reroute a
subnet to fail over to the redundant site, and that takes say 30 minutes to
settle...a 30 minute outage for a once in ten years event is not really an
issue.</DIV>
<DIV> </DIV>
<DIV>John Scully</DIV>
<DIV>Digital Telephone Alliance</DIV>
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<DIV style="font-color: black"><B>From:</B> <A title=flavio@voffice.com.br
href="mailto:flavio@voffice.com.br">Flavio Goncalves</A> </DIV>
<DIV><B>Sent:</B> Wednesday, May 29, 2013 4:49 PM</DIV>
<DIV><B>To:</B> <A title=miha@softnet.si href="mailto:miha@softnet.si">Miha</A>
</DIV>
<DIV><B>Cc:</B> <A title=users@lists.opensips.org
href="mailto:users@lists.opensips.org">OpenSIPS users mailling list</A> </DIV>
<DIV><B>Subject:</B> Re: [OpenSIPS-Users] HA, geographic
redundancy</DIV></DIV></DIV>
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<DIV dir=ltr>Miha,
<DIV> </DIV>
<DIV>Phones try the second DNS server automatically, so DNS refresh is not
usually a problem. The problem is with some PBXs that don't support RFC3263. In
this case, the client can implement automatic failover via scripting, but you
don't have control over it. </DIV>
<DIV> </DIV>
<DIV>B.R. </DIV>
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<DIV dir=ltr>Flavio E. Goncalves<BR>
<DIV> </DIV></DIV></DIV><BR><BR>
<DIV class=gmail_quote>2013/5/29 Miha <SPAN dir=ltr><<A
href="mailto:miha@softnet.si" target=_blank>miha@softnet.si</A>></SPAN><BR>
<BLOCKQUOTE
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class=gmail_quote>Hi Flavio,<BR><BR>thanks for your replay.<BR><BR>What would
you suggest? we are ISP, subnet migration should<BR>not be a problem but this
will resolve down time as this<BR>would need time to network admin re-route
subnet.<BR><BR>What about DNS srv. This would not be a problem with
zones<BR>as need time to refresh (i just did I quick look to RFC<BR>that you
posted in previous post.).<BR><BR>tnx!<BR><BR>Miha<BR>
<DIV>
<DIV class=h5><BR>On Wed, 29 May 2013 11:19:59 -0300<BR>Flavio Goncalves
<<A href="mailto:flavio@voffice.com.br">flavio@voffice.com.br</A>>
wrote:<BR>> Hi Miha,<BR>><BR>> I would suggest two ways. The first is
to use the RFC3263<BR>> and implement DNS<BR>> redundancy using DNS SRV
and NAPTR. The only other way<BR>> that I know is using<BR>> BGP and
migrating the IP address to another server. You<BR>> will need to
have<BR>> an AS to do this. It can be implemented by a good (if he<BR>>
is willing to do<BR>> that) Internet Provider.<BR>><BR>>
B.R.<BR>><BR>> Flavio E. Goncalves<BR>><BR>><BR>> 2013/5/29
Miha <<A
href="mailto:miha@softnet.si">miha@softnet.si</A>><BR>><BR>> >
Hi,<BR>> ><BR>> > i need a little help or information about
geographic<BR>> redundancy.<BR>> ><BR>> > What would be the
best way to achive that? If use<BR>> opensips for<BR>> > registration
and all users are registered with domain I<BR>> can change record<BR>>
> in DNS server but this will need time.<BR>> ><BR>> > What
would be the best way to achive this with minimun<BR>> down time?<BR>>
><BR>> ><BR>> > Thanks!<BR>> > Miha<BR>>
><BR></DIV></DIV>> >
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