<HTML><BODY style="word-wrap: break-word; -khtml-nbsp-mode: space; -khtml-line-break: after-white-space; "><DIV><DIV>On Jul 19, 2007, at 5:16 PM, <A href="mailto:asterisk-users-request@lists.digium.com">asterisk-users-request@lists.digium.com</A> wrote:</DIV><BR class="Apple-interchange-newline"><BLOCKQUOTE type="cite"><BLOCKQUOTE type="cite"><P style="margin: 0.0px 0.0px 0.0px 10.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">On 7/18/07, Norman Franke <<A href="mailto:Norman@myasd.com">Norman@myasd.com</A>> wrote:</FONT></P> <BLOCKQUOTE type="cite"><P style="margin: 0.0px 0.0px 0.0px 20.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">I've been evaluating Asterisk for a while, and things seem to be</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 20.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">going very well. The issue of redundancy and automatic fail-over is</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 20.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">now on my mind. I searched the archives and googled for solutions,</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 20.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">but didn't really come up with much.</FONT></P> </BLOCKQUOTE></BLOCKQUOTE><P style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica; min-height: 14.0px"><BR></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">To add to what Edgar said, yes, use linux-ha.<SPAN class="Apple-converted-space"> </SPAN>It works nicely in</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">combination with DRBD.<SPAN class="Apple-converted-space"> </SPAN>DRBD uses a dedicated network interface on</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">each box with a crossover cable between the two.<SPAN class="Apple-converted-space"> </SPAN>It does a block</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">level copy of the entire filesystem, so you have two machines that are</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">identical.<SPAN class="Apple-converted-space"> </SPAN>The you use the linux-ha heartbeat to monitor the OS and</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">asterisk.<SPAN class="Apple-converted-space"> </SPAN>If anything goes wrong, it can fail over to the second</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">machine.</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px; font: 12.0px Helvetica; min-height: 14.0px"><BR></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">This is pretty easy to set up with Analog lines.<SPAN class="Apple-converted-space"> </SPAN>With PRI's you'd</FONT></P> <P style="margin: 0.0px 0.0px 0.0px 0.0px"><FONT face="Helvetica" size="3" style="font: 12.0px Helvetica">need the fonebridge or the FSV-4PFS from <A href="http://www.failsafevoip.com">http://www.failsafevoip.com</A></FONT></P> </BLOCKQUOTE><BR></DIV><DIV>Thanks, I wasn't aware of the FSV-4PFS box. Can one switch it remotely (e.g. over the network?)</DIV><DIV><BR class="khtml-block-placeholder"></DIV>All of my dynamic data is stored in a database (using Asterisk RT to read queue and agent settings.) So, that eases part of the problem.<BR><DIV><BR class="khtml-block-placeholder"></DIV><DIV>It would be nice to have a way to gracefully switch boxes, e.g. all new calls to the backup box, wait until all calls on the primary normally end, and then take server down for an upgrade. </DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>It's impossible to tell what the Ranch Networks box does from their web site. Anyone using it?</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV>-Norman Franke</DIV><DIV>www.myasd.com</DIV><DIV><BR class="khtml-block-placeholder"></DIV><DIV><BR class="khtml-block-placeholder"></DIV></BODY></HTML>