The problem with relying on DNS for a failover solution is caching. Many
ISPs name servers cache their records. Even if you turn down your TTLs, not
all ISPs (especially the large ones) will respect them. They will cache
based on their settings.
The end problem is that when you have a failure, your DNS switches over to
point at your secondary VoIP server, but your clients all over the world
still end up getting the old DNS info from their ISP and try and contact the
dead server.
----- Original Message -----
From: "Duane" <[EMAIL PROTECTED]>
To: "Blaine Aldridge" <[EMAIL PROTECTED]>
Cc: <[email protected]>
Sent: Monday, May 21, 2007 7:28 PM
Subject: Re: [on-asterisk] Creating an Asterisk Failover solution
Blaine Aldridge wrote:
Leif,
Can I take one publicly routable IP address from a /24 and then just
bind it on a completely different network / ASN?
I understand how to do it on the same network but I'm not sure if you
can do this over different ASN's.
SRV records would be the cheaper options otherwise you will need one or
more dedicated load balancing boxes of some description.
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