[Asterisk-Users] SIP phone failover using DNS SRV?

[Eric Wieling aka ManxPower]

Rana Dutt wrote:
> Has anyone successfully had a SIP phone fail over from Asterisk Server A to Server B using DNS SRV? 
> 
> If so, which phone worked for you? I'm assuming you set up your DNS SRV records so that the IP
 >adresses of A and B are associated with the same name, and both 
servers have equal priority and equal weight.
> 
> In order to make calls through B after A goes down, do you have to wait as long as the registration retry
 > interval? Or can you make calls through B as soon as you pick up the 
phone and dial, because the INVITE
 >message through A fails, and the phone re-sends the INVITE through B?
> 
> Thanks for any help. We've been trying this with Aastra 480i phones and SJ Phone without much luck so far. 

I do this with SIPura.  I tell the box to use DNS SRV records.  The 
first record points to the internal IP of my asterisk server (for use 
when I am at the home/office).  The second one points to the external IP 
of my router that has port forwarding.  I can roam pretty much anywhere 
without any reconfiguration.

-- 
Eric Wieling * BTEL Consulting * 504-210-3699 x2120