[asterisk-users] Asterisk load balancing and failover

Fri Apr 2 02:36:29 CDT 2010

As I Known, when a call coming to a MSC, the MSC will request the HLR for subscriber information. HLR response will include the address of the Asterisk Server, so the MSC will forward the call to Asterisk Server.

Is it right ?

If I have three Asterisk Server (each has a point code), is there any way to configure HLR so  when MSC ask HLR about the Asterisk Server, HLR will response the address in a round robin way. So the call will be balance to three Asterisk Server ?.

Do you mean above  is the way MSC do load balancing ?.

--- On Thu, 4/1/10, Ngo-Vi Hoai-Anh <hoaianh at gmx.de> wrote:

From: Ngo-Vi Hoai-Anh <hoaianh at gmx.de>
Subject: Re: [asterisk-users] Asterisk load balancing and failover
To: "Asterisk Users Mailing List - Non-Commercial Discussion" <asterisk-users at lists.digium.com>
Date: Thursday, April 1, 2010, 3:01 AM

I'm not quite sure what do you mean with MSC.

Anyway, I assume your environment is like

[PSTN (Public Switched Telephone Network)]<------------------>[DTM 
Switch]<-----------SS7  (PRI line)---------------->[Asterisk 
Box]<----------------VoIP (SIP/IAX etc...)---------> IP net

If you mean MSC Mobile Switching Center it could look like
[GSM Network]<------------------------->[MSC]<----------------- SS7 
-------------------->[Asterisk 
Box]<---------------------VoIP---------------------->IP net

Normally, the DTM Switch or MSC should be configurable for 
load-balancing and failover.

Point code is for SS7 networking like IP address for IP networking.

huu giang schrieb:
> Do you mean that SS7 switch is a MSC and do all MSC support load 
> balancing without any hardware between it and my Server.
>
> Sorry for my English, what do you mean two point codes for my servers 
> ?. I have at least two servers.
>
>
> --- On *Wed, 3/31/10, Tobias Wolf /<tobias.wolf at evision.de>/* wrote:
>
>
>     From: Tobias Wolf <tobias.wolf at evision.de>
>     Subject: Re: [asterisk-users] Asterisk load balancing and failover
>     To: "Asterisk Users Mailing List - Non-Commercial Discussion"
>     <asterisk-users at lists.digium.com>
>     Date: Wednesday, March 31, 2010, 4:27 AM
>
>     huu giang schrieb:
>     > Hi Zeeshan
>     >
>     > I know a solution using DRBD, Heartbeat and RedFone hardware to
>     > provide failover ability to Asterisk.
>     >
>     > If I have two Asterisk Servers, and each server has a TDM card
>     and a
>     > PRI line connect to each card, how your solution can provide
>     failover
>     > ability to Asterisk ? Do you need any other hardware?
>     >
>     > The calles to my IVR System don't just come from IP network
>     (SIP) but
>     > can come from SS7 network.
>     >
>     Well, if that case the SS7 Switch to which you are connected
>     should be
>     able to load balance the call to both of your servers. I guess you
>     have
>     two point codes for you servers? If one server goes down, the ss7
>     switch
>     received the red alarms and
>     stops to route calls to it. Once the server is up again it will
>     get new
>     calls.
>
>     So, we only thing you have to worry about is to keep state
>     information
>     between the two servers consistent if people record messages or
>     access
>     databases.
>
>     Regards,
>
>     Tobias
>     >
>     > Thanks.
>     >
>     >
>     >
>     >
>     > --- On *Fri, 3/26/10, Zeeshan Zakaria /<zishanov at gmail.com
>     </mc/compose?to=zishanov at gmail.com>>/* wrote:
>     >
>     >
>     >     From: Zeeshan Zakaria <zishanov at gmail.com
>     </mc/compose?to=zishanov at gmail.com>>
>     >     Subject: Re: [asterisk-users] Asterisk load balancing and
>     failover
>     >     To: "Asterisk Users Mailing List - Non-Commercial Discussion"
>     >     <asterisk-users at lists.digium.com
>     </mc/compose?to=asterisk-users at lists.digium.com>>
>     >     Date: Friday, March 26, 2010, 1:51 AM
>     >
>     >     About two years ago I setup two high availability solutions
>     using
>     >     DRBD and Heartbeat. The worked great and shutting down or
>     >     unplugging one server stayed transparent for the callers, as
>     IVRs
>     >     stayed available. Having said this, it was not very straight
>     >     forward to set it up, but not very difficut either. So Heartbeat
>     >     and DRBD can be a good starting point for you.
>     >
>     >     --
>     >     Zeeshan A Zakaria
>     >
>     >>     On 2010-03-26 4:40 AM, "huu giang" <huugiang104 at yahoo.com
>     </mc/compose?to=huugiang104 at yahoo.com>
>     >>     </mc/compose?to=huugiang104 at yahoo.com
>     </mc/compose?to=huugiang104 at yahoo.com>>> wrote:
>     >>
>     >>     Hi List,
>     >>
>     >>     I'm finding a solution to provide failover and load balancing
>     >>     features to my IVR system.
>     >>
>     >>     Anyone suggest me what is the best solution please?. what the
>     >>     hardware I should use ?.
>     >>
>     >>     I heard about RedFone, but someone on the mail list said
>     that it
>     >>     is not good because *TDMoE* module in asterisk is not so
>     *stable*
>     >>     and TDMoE is stale. And It seems that RedFone doesn't not
>     support
>     >>     load balancing ability (I can't find any document about this
>     >>     feature).
>     >>
>     >>     Best Regards,
>     >>     Giang Huu.
>     >>
>     >>
>     >>
>     >>
>     >>     --
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