Thanks for the informative replies.<br><br>While Enswitch sounds like a a nice solution, I don't believe it's for our shop. I really would like to develop this solution internally.<br><br>My thoughts thus far are pointing towards a scalable, redundant solution based on stock hardware.
<br><br>I am thinking of running a matched server pair (1 or 2U) as the application servers (both running a matched Asterisk build) most likely on RHL. The servers will contain redundant hardware (power supplies etc...)<br>
<br>The application servers will be backed up by a matched pair of MySQL servers which will use MySQL replication between each other and will use a floating IP; a heartbeat will beat between the pair and nominate one a master should another fail.
<br><br>The disk storage will be local or offloaded to an existing netApp filer.<br><br>From the reading I've done, running SER as a proxy to the two application servers should serve it's purpose well, providing load balancing and monitoring of the application server behind it (should one Asterisk box return a 3XX-5XX I would then route advance to the second application server and take the first offline.
<br><br>Question - Is running SER by best bet here? Would I be better off running a heartbeat between the two app servers?<br><br>I am not too worried about SIP registration/expiration's of the SIP users or peers:<br>1) Most of the call center traffic will be terminated out another platform; the calls are being sent to a DID (not a SIP URL).
<br>2) My SIP peers are all within the trusted network core and will not need to maintain status of each other.<br><br>Here's where it gets tricky:<br><br>As agents login to a queue or become 'available' Asterisk is maintaining their state; I believe an agents state is maintained across an Asterisk reload. Could an agents state be maintained should the second app server take over for the first?
<br><br>Anyone attending ClueCon next week??<br><br>Thanks,<br><br>_Chris_<br><br><br><br><br><br><br><div><span class="gmail_quote">On 7/28/06, <b class="gmail_sendername">Douglas Garstang</b> <<a href="mailto:dgarstang@oneeighty.com">
dgarstang@oneeighty.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div>
<div bgcolor="#ffffff">
<div><span><font color="#0000ff" face="Arial" size="2">What
about sip registration replication?</font></span></div>
<div><span><font color="#0000ff" face="Arial" size="2">
<div><span><font color="#0000ff" face="Arial" size="2">What
about SIP subscription replication?</font></span></div></font></span></div>
<div><span><font color="#0000ff" face="Arial" size="2">What
about BLF replication?</font></span></div>
<div><span><font color="#0000ff" face="Arial" size="2">What
about using DUNDi to replicate applications for redundancy?</font></span></div>
<div><span><font color="#0000ff" face="Arial" size="2">How
would you handle different phones ability to failover if they don't do it so
well?</font></span></div>
<div><span><font color="#0000ff" face="Arial" size="2">How
would handle the fact that the config files have a hard coded database
IP?</font></span></div>
<div><span><font color="#0000ff" face="Arial" size="2"></font></span> </div>
<div><span><font color="#0000ff" face="Arial" size="2">And so
on... </font></span></div>
<div><span><font color="#0000ff" face="Arial" size="2"></font></span> </div>
<div><span><font color="#0000ff" face="Arial" size="2">I
don't think anyone has a great solution to date.</font></span></div>
<div><span><font color="#0000ff" face="Arial" size="2"></font></span> </div>
<blockquote dir="ltr" style="border-left: 2px solid rgb(0, 0, 255); padding-left: 5px; margin-left: 5px; margin-right: 0px;">
<div dir="ltr" align="left"><font face="Tahoma" size="2"></font></div><font face="Tahoma" size="2"></font><div><span class="q"><font face="Tahoma" size="2">-----Original Message-----<br><b>From:</b> Stephen Wingfield
[mailto:<a href="mailto:steve@bicom.us" title="mailto:steve@bicom.us" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">steve@bicom.us</a>]<br><b>Sent:</b> Friday, July 28, 2006 4:14
PM<br><b>To:</b> Asterisk Users Mailing List - Non-Commercial
Discussion<br></font></span></div><div><span class="e" id="q_10cb74ec2edb1cf9_2"><font face="Tahoma" size="2"><b>Subject:</b> Re: [asterisk-users] Looking for carrier grade
redundant solution<br><br></font></span></div><div></div></blockquote></div><div><span class="e" id="q_10cb74ec2edb1cf9_4">
<div><font face="Arial" size="2">Chris,</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">Heartbeat failover will usually be your best
mixed approach.</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">As always there is a cost benefit to be
considered.</font></div>
<div><font face="Arial" size="2">Where the call absolutely has to stay up then
Fault-Tolerant software and hardware is the only option that works with
Asterisk to date.</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">If however you wish to keep costs to a mimimum
then possibly an onsite / hosted model where the back up is available
remotely. This model depends on set up however.</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">In all cases I would suggest you take a peruse of
PBXware : <a href="http://www.bicomsystems.com/products/online_demo/" title="http://www.bicomsystems.com/products/online_demo/" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">http://www.bicomsystems.com/products/online_demo/
</a> which
is our SMB Edition. We will next week launch our Call Center Edition that is
packed with features and functions to assist the running of a dedicated to
running a Call Center efficiently.</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">Feel free to contact me offline steve {at]
bicomsystems {dot] com and can make more precise suggestions according to
requirement.</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">Regards</font></div>
<div><font face="Arial" size="2">Steve</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2"></font> </div>
<blockquote style="border-left: 2px solid rgb(0, 0, 0); padding-right: 0px; padding-left: 5px; margin-left: 5px; margin-right: 0px;">
<div style="font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none;">----- Original Message ----- </div>
<div style="background: rgb(228, 228, 228) none repeat scroll 0% 50%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial; font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none;">
<b>From:</b>
<a title="chris.aloi@gmail.com (mailto:chris.aloi@gmail.com)" href="mailto:chris.aloi@gmail.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">Christopher
Aloi</a> </div>
<div style="font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none;"><b>To:</b> <a title="asterisk-users@lists.digium.com (mailto:asterisk-users@lists.digium.com)" href="mailto:asterisk-users@lists.digium.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
Asterisk Users Mailing List -
Non-Commercial Discussion</a> ; <a title="asterisk-biz@lists.digium.com (mailto:asterisk-biz@lists.digium.com)" href="mailto:asterisk-biz@lists.digium.com" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
asterisk-biz@lists.digium.com</a>
</div>
<div style="font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none;"><b>Sent:</b> Friday, July 28, 2006 3:44
AM</div>
<div style="font-family: arial; font-style: normal; font-variant: normal; font-weight: normal; font-size: 10pt; line-height: normal; font-size-adjust: none;"><b>Subject:</b> [asterisk-users] Looking for
carrier grade redundant solution</div>
<div><br></div>Hello List -<br><br>We are looking add Asterisk to the core
of our voice/data network. Our first application will provide a hosted
call center application for a number of tenants (customers) who will have
between 5-20 agents (seats) answering ingress calls. The calls will
ingress and egress the Asterisk server SIP (all TDM is handled by Sonus
switches). <br><br>My goal is to design a redundant solution using a
multiple Asterisk servers with an NFS mounted filesystem.<br><br>I've done
some reading regarding Asterisk redundany, and so far it seems the best
approach is running redundant hardware (power supplies etc), matching
servers (with a heart beat ping between them) and a NFS filer for storage
(hot swapable) connected to each box via gigE. <br><br>Am I on the right
track? Any other suggestions or resources I might have missed
regarding developing a redundant solution?<br><br>Thanks for your
time,<br><br>_Chris_<br>
<p>
</p><hr>
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