[OpenSIPS-Users] HA, geographic redundancy

[John Scully]

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.

John Scully
Digital Telephone Alliance

From: Flavio Goncalves 
Sent: Wednesday, May 29, 2013 4:49 PM
To: Miha 
Cc: OpenSIPS users mailling list 
Subject: Re: [OpenSIPS-Users] HA, geographic redundancy

Miha,  

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.  

B.R. 

Flavio E. Goncalves





2013/5/29 Miha <miha at softnet.si>

  Hi Flavio,

  thanks for your replay.

  What would you suggest? we are ISP, subnet migration should
  not be a problem but this will resolve down time as this
  would need time to network admin re-route subnet.

  What about DNS srv. This would not be a problem with zones
  as need time to refresh (i just did I quick look to RFC
  that you posted in previous post.).

  tnx!

  Miha


  On Wed, 29 May 2013 11:19:59 -0300
  Flavio Goncalves <flavio at voffice.com.br> wrote:
  > Hi Miha,
  >
  > I would suggest two ways. The first is to use the RFC3263
  > and implement DNS
  > redundancy using DNS SRV and NAPTR. The only other way
  > that I know is using
  > BGP and migrating the IP address to another server. You
  > will need to have
  > an AS to do this. It can be implemented by a good (if he
  > is willing to do
  > that) Internet Provider.
  >
  > B.R.
  >
  > Flavio E. Goncalves
  >
  >
  > 2013/5/29 Miha <miha at softnet.si>
  >
  > > Hi,
  > >
  > > i need a little help or information about geographic
  > redundancy.
  > >
  > > What would be the best way to achive that? If use
  > opensips for
  > > registration and all users are registered with domain I
  > can change record
  > > in DNS server but this will need time.
  > >
  > > What would be the best way to achive this with minimun
  > down time?
  > >
  > >
  > > Thanks!
  > > Miha
  > >

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