[Asterisk-Users] Connecting to a cluster of SIP servers

[Douglas Garstang]

Well, for a start, there's a single director, which means a single point of failure. Really, I wonder why they even bother.

> -----Original Message-----
> From: Sergio García Murillo [mailto:Sergio.Garcia at ydilo.com]
> Sent: Monday, April 24, 2006 9:44 AM
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: RE: [Asterisk-Users] Connecting to a cluster of SIP servers
> 
> 
> 
> How about using LVS?
> 
> http://www.ultramonkey.org/3/topologies/lb-overview.html
> 
> 
> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com 
> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of 
> Douglas Garstang
> Sent: lunes, 24 de abril de 2006 17:12
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: RE: [Asterisk-Users] Connecting to a cluster of SIP servers
> 
> You can't use round robin DNS. Round robin DNS will cause 
> every SIP packet to potentially go through a different static 
> path, which will break things.
> 
> > -----Original Message-----
> > From: billy at kersting.com [mailto:billy at kersting.com]
> > Sent: Saturday, April 22, 2006 5:27 AM
> > To: 'Asterisk Users Mailing List - Non-Commercial Discussion'
> > Subject: RE: [Asterisk-Users] Connecting to a cluster of SIP servers
> > 
> > 
> > Although there maybe a better way, this would work:
> > 
> > 1. Add the IP's into your sip.conf and set qualify=yes.
> > 2. Make your dialplan something like the following:
> > 	exten => _X.,1,Dial,SIP/${EXTEN}@84.92.0.75
> > 	exten => _X.,2,Hangup
> > 	exten => _X.,102,Dial,SIP/${EXTEN}@84.92.0.76
> > 	exten => _X.,103,Hangup
> > 	exten => _X.,203,Dial,SIP/${EXTEN}@84.92.0.189
> > 	exten => _X.,204,Hangup
> > 	exten => _X.,304,Dial,SIP/${EXTEN}@84.92.0.190
> > 	exten => _X.,305,Hangup
> > 
> > This would make your failover work but certainly wouldn't 
> > help with the load
> > balancing between the servers. If any cannot qualify or are 
> > congested, they
> > will automatically failover to the next server.
> > 
> > I believe most people use an SER proxy for this type of 
> > application. It
> > seems to work well with the round robin type DNS.
> > 
> > William	
> > 
> > -----Original Message-----
> > From: asterisk-users-bounces at lists.digium.com
> > [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of 
> > Steve Hill
> > Sent: Saturday, April 22, 2006 5:13 AM
> > To: Asterisk-Users at lists.digium.com
> > Subject: [Asterisk-Users] Connecting to a cluster of SIP servers
> > 
> > 
> > My Asterisk server is connecting to "sip.plus.net", which 
> resolves to 
> > multiple IP addresses:
> > 
> >      sip.plus.net.           300     IN      A       84.92.0.75
> >      sip.plus.net.           300     IN      A       84.92.0.76
> >      sip.plus.net.           300     IN      A       84.92.5.189
> >      sip.plus.net.           300     IN      A       84.92.5.190
> > 
> > If one of these machines is down (i.e. it's not replying to the SIP 
> > packets or it's sending back ICMP Port Unreachable), Asterisk 
> > keeps trying 
> > the same server. Shouldn't Asterisk move on to the next server 
> > automatically in this case? It seems to only way to do this 
> > at the moment 
> > is to run the "reload" command, which causes it to do a DNS 
> > lookup and it 
> > may then pick one of the other servers.
> > 
> > -- 
> > 
> >   - Steve
> >     xmpp:steve at nexusuk.org   sip:steve at nexusuk.org   
> http://www.nexusuk.org/
> 
>       Servatis a periculum, servatis a maleficum - Whisper, 
> Evanescence
> 
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