<div dir="ltr"><br><br><div class="gmail_quote">2008/9/3 Daniel Watkins <span dir="ltr"><<a href="mailto:daniel.watkins@credativ.co.uk">daniel.watkins@credativ.co.uk</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Unfortunately, when this switchover occurs, all the clients lose their<br>
registrations as the registration details are stored solely in memory on<br>
the primary server. It then takes some time for the clients to<br>
reconnect to the secondary server, during which time they are unusable.<br></blockquote></div><br><div><br></div><div><br></div><div>Hi,</div><div><br></div><div>Our sites mostly use SNOM phones.</div><div><br></div><div>
Our failover strategy is to have a virtual address which moves from the primary to the backup server.</div><div>We then use the "send_arp" program to send a promiscious ARP announcing the new MAC address</div><div>
for the virtual address.</div><div><br></div><div>We discovered that the SNOM phones all re-register when they see this ARP. How handy is that?</div><div><br></div><div>In tests, we failover the address to the backup box and you can immediately continue with making and receiving calls.</div>
<div><br></div><div>Steve</div><div><br></div></div>