<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
Your right, of course. Using DNS SRV for reliability has its
limitations. The idea is to combine various methods to come as close as
you can get. I assume that your statement is based on how RFC3263
specifies handling of outbound server going down mid-dialog?<br>
g-)<br>
<br>
Ritesh Jalan wrote:
<blockquote cite="mid013401c6a1bc$898d72f0$788547ca@riteshc38wx3cg"
type="cite">
<meta http-equiv="Content-Type" content="text/html; ">
<meta content="MSHTML 6.00.2900.2912" name="GENERATOR">
<style></style>
<div><font face="Arial" size="2">Hi</font></div>
<div> </div>
<div><font face="Arial" size="2">DNS SRV is a Load Balance system,
How it can be a fail over.</font></div>
<div> </div>
<div><font face="Arial" size="2">Only for call initialisation a UAC
will search for DNS SRV records, but after the the call starts, if
First server (From which call is beaing initiated) goes down then
thebye message will not go to second server </font></div>
<div> </div>
<div> </div>
<div><font face="Arial" size="2"> </font></div>
<div> </div>
<div> </div>
<div>net4.in<br>
Ritesh Jalan <br>
Senior Engineer - Business Solution <br>
Net4India Ltd. <br>
D-25 Sector - 3 <br>
Noida - 201301 <br>
India <br>
Tel: 91-120-5323500 <br>
Mobile: 91-9818616329 <br>
Fax: 91-120-5323520 <br>
MSN: <a href="mailto:ritesh_jalan@hotmail.com">ritesh_jalan@hotmail.com</a>
<br>
URL: <a href="http://www.net4.in">http://www.net4.in</a> <br>
</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; font-stretch: normal;">-----
Original Message ----- </div>
<div
style="background: rgb(228, 228, 228) none repeat scroll 0%; -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; font-stretch: normal;"><b>From:</b>
<a title="samu60@gmail.com" href="mailto:samu60@gmail.com">samuel</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; font-stretch: normal;"><b>To:</b>
<a title="g_jacobsen@yahoo.co.uk"
href="mailto:g_jacobsen@yahoo.co.uk">G. Jacobsen</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; font-stretch: normal;"><b>Cc:</b>
<a title="serusers@iptel.org" href="mailto:serusers@iptel.org">seruser
List</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; font-stretch: normal;"><b>Sent:</b>
Friday, July 07, 2006 2:00 PM</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; font-stretch: normal;"><b>Subject:</b>
Re: [Serusers] Global Failover Server</div>
<div><br>
</div>
Following lines are an extract from the SIPit preliminary report
regarding supported DNS features in current implementations:<br>
<br>
>160 people from 16 countries attended SIPit 18 with <strong>73</strong>
different SIP implementations: <br>
<br>
>Full 3263 25<br>
>3263 (no naptr,SRV on) 13<br>
>A only 22<br>
>IP only (no DNS) 9<br>
<br>
Which gives a percentage of 38/73 supporting SRV records, so more or
less half of the implementations supports this type of load balancing. <br>
<br>
This value should be used with care because implementations include
both UAs and proxies/redirect/* servers.<br>
I can also say that a higher percentage of desktop SIP phones supports
DNS SRVs, but since it's just my impression from the ones I have
touched I can not assure nor give a percentage... <br>
<br>
Hope it helps,<br>
<br>
Samuel.<br>
<br>
<br>
<br>
<div><span class="gmail_quote">2006/7/6, G.Jacobsen <<a
onclick="return top.js.OpenExtLink(window,event,this)"
href="mailto:g_jacobsen@yahoo.co.uk" target="_blank">
g_jacobsen@yahoo.co.uk </a>>:</span>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0px 0px 0px 0.8ex; padding-left: 1ex;">
<div>
<div>
<div><span><font color="#0000ff" face="Arial" size="2">Samuel,</font></span></div>
<div> </div>
<div><span>Do you happen to know what percentage of UAs out there
are really </span>"Compliant" UAs <span> ?</span></div>
<div> </div>
<div><span><font color="#0000ff" face="Arial" size="2">My
impression so far regarding SRV DNS records is that they are
theoretically a nice feature but unfortunately almost useless since one
needs to cater for those non-compliant UAs anyway. I would love to be
convinced of the contrary. </font></span></div>
<div> </div>
<div><span><font color="#0000ff" face="Arial" size="2">Can anyone
supply real usage figures regarding compliant/non-compliant UAS ?</font></span></div>
<div> </div>
<div><span><font color="#0000ff" face="Arial" size="2">TIA</font></span></div>
<div> </div>
<div><span><font color="#0000ff" face="Arial" size="2">Gerry</font></span></div>
</div>
<div><span>
<div> </div>
<div> </div>
<div> </div>
<blockquote>
<div dir="ltr" align="left"><font face="Tahoma" size="2">-----Original
Message-----<br>
<b>From:</b> <a
onclick="return top.js.OpenExtLink(window,event,this)"
href="mailto:serusers-bounces@lists.iptel.org" target="_blank">serusers-bounces@lists.iptel.org
</a>[mailto:<a
onclick="return top.js.OpenExtLink(window,event,this)"
href="mailto:serusers-bounces@lists.iptel.org" target="_blank">
serusers-bounces@lists.iptel.org</a>]<b>On Behalf Of </b>samuel<br>
<b>Sent:</b> Donnerstag, 6. Juli 2006 14:52 <br>
<b>To:</b> Ritesh Jalan<br>
<b>Cc:</b> seruser List<br>
<b>Subject:</b> [Bulk] Re: [Serusers] Global Failover Server <br>
<br>
</font></div>
<br>
Look at RFC 3623.<br>
Cofigure two SRV entries in
your DNS, one pointing to the UAS SERver and another to the UK server.
"Compliant" UAs will try to contact the other proxy upon failure of
their current one. <br>
<br>
Samuel.<br>
<br>
<div><span class="gmail_quote">2006/7/5, Ritesh Jalan <<a
onclick="return top.js.OpenExtLink(window,event,this)"
href="mailto:ritesh.j@net4.in" target="_blank">ritesh.j@net4.in</a>>:</span>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0px 0px 0px 0.8ex; padding-left: 1ex;">
<div>
<div bgcolor="#ffffff">
<div><font face="Arial" size="2">Hi All</font></div>
<div> </div>
<div><font face="Arial" size="2">Pls. guide me how can we
implement failover on SIP Server located globally, Like one server in
USA another in UK. </font></div>
<div> </div>
<div> </div>
<div> </div>
<div><font face="Arial" size="2">Ritesh Jalan <br>
Mobile: 91-9818616329 <br>
MSN: <a onclick="return top.js.OpenExtLink(window,event,this)"
href="mailto:ritesh_jalan@hotmail.com" target="_blank">ritesh_jalan@hotmail.com</a>
<br>
</font></div>
</div>
</div>
<br>
_______________________________________________<br>
Serusers mailing list<br>
<a onclick="return top.js.OpenExtLink(window,event,this)"
href="mailto:Serusers@lists.iptel.org" target="_blank">Serusers@lists.iptel.org</a><br>
<a onclick="return top.js.OpenExtLink(window,event,this)"
href="http://lists.iptel.org/mailman/listinfo/serusers" target="_blank">http://lists.iptel.org/mailman/listinfo/serusers</a><br>
<br>
<br>
</blockquote>
</div>
<br>
</blockquote>
</span></div>
</div>
<br>
_______________________________________________<br>
Serusers mailing list<br>
<a onclick="return top.js.OpenExtLink(window,event,this)"
href="mailto:Serusers@lists.iptel.org" target="_blank">Serusers@lists.iptel.org</a><br>
<a onclick="return top.js.OpenExtLink(window,event,this)"
href="http://lists.iptel.org/mailman/listinfo/serusers" target="_blank">http://lists.iptel.org/mailman/listinfo/serusers</a><br>
<br>
<br>
</blockquote>
</div>
<br>
<p> </p>
<hr> _______________________________________________<br>
Serusers mailing list<br>
<a class="moz-txt-link-abbreviated" href="mailto:Serusers@lists.iptel.org">Serusers@lists.iptel.org</a><br>
<a class="moz-txt-link-freetext" href="http://lists.iptel.org/mailman/listinfo/serusers">http://lists.iptel.org/mailman/listinfo/serusers</a><br>
</blockquote>
<pre wrap="">
<hr size="4" width="90%">
_______________________________________________
Serusers mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Serusers@lists.iptel.org">Serusers@lists.iptel.org</a>
<a class="moz-txt-link-freetext" href="http://lists.iptel.org/mailman/listinfo/serusers">http://lists.iptel.org/mailman/listinfo/serusers</a>
</pre>
</blockquote>
</body>
</html>