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<DIV dir=ltr align=left><SPAN class=910175406-27042009><FONT face=Arial
color=#0000ff size=2>This is not the DNS job to check at the web service
availability.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=910175406-27042009><FONT face=Arial
color=#0000ff size=2>You could make an external script that is testing for the
service availibility </FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=910175406-27042009><FONT face=Arial
color=#0000ff size=2>and change the dns accordingly, like (...) :
</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=910175406-27042009><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=910175406-27042009><FONT face=Arial
color=#0000ff size=2>web1 active ?</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=910175406-27042009><FONT face=Arial
color=#0000ff size=2> yes : was it active at last test
?</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=910175406-27042009><FONT face=Arial
color=#0000ff
size=2> yes
: do nothing</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN
class=910175406-27042009>
<FONT face=Arial color=#0000ff size=2>no : set www to point to web1 in
DNS</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=910175406-27042009> <FONT
face=Arial color=#0000ff size=2>no : was it already inactive
?</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN
class=910175406-27042009>
<FONT face=Arial color=#0000ff size=2>yes : do nothing</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN
class=910175406-27042009>
<FONT face=Arial color=#0000ff size=2>no : set www to point to web2 in
DNS</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=910175406-27042009><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=910175406-27042009><FONT face=Arial
color=#0000ff size=2>and with having www/web1/web2 having a low
TTL.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=910175406-27042009><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=910175406-27042009><FONT face=Arial
color=#0000ff size=2>Philippe</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=910175406-27042009><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=910175406-27042009><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=910175406-27042009><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV><BR>
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<FONT face=Tahoma size=2><B>From:</B> bind-users-bounces@lists.isc.org
[mailto:bind-users-bounces@lists.isc.org] <B>On Behalf Of </B>Mohammed
Ejaz<BR><B>Sent:</B> Monday, April 27, 2009 8:11 AM<BR><B>To:</B>
bind-users@lists.isc.org<BR><B>Subject:</B> Failover<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">Hi all, <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">Can it be possible through the bind, www records
should work as failover, I mean during the primary record unavailable and then
it should go for next www only, Pls. note that I don’t want let they work as
round robin function. <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">1. Primary www record pointing 1.2.3.4 as long as it
is available it should read from the same IP, <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">2. Secondary www record pointing 4.3.2.1 it should act
only incase of primary is down. <o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face="Times New Roman" size=3><SPAN
style="FONT-SIZE: 12pt">Ejaz </SPAN></FONT></P></DIV></BLOCKQUOTE></BODY></HTML>