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<DIV dir=ltr><FONT face=Arial color=#000000 size=2>Hi all,</FONT></DIV>
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<DIV dir=ltr><FONT face=Arial color=#000000 size=2>Is there an "all-servers" parameter for downstream servers?</FONT></DIV>
<DIV dir=ltr><FONT face=Arial color=#000000 size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial color=#000000 size=2>I have a configuration with three DNS domains, each one served by two dnsmasq servers (complete description at the end).</FONT></DIV>
<DIV dir=ltr><FONT face=Arial color=#000000 size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial color=#000000 size=2>I'm trying to set up a redundant structure, with cron jobs that ensure that both DNS servers for each domain are identical, so if one fails, the other will serve the requests. All the machines under my control repeat the query in rapid sucession if it doesn't come immediately answered, and the DNS servers seem to understand that so the behaviour is that any query from a machine in my domain reaches all dns servers in the network and it is always answered, regardless of which machines are down. For the size of my systems this is fine, it doesn't matter if it is unefficient.</FONT></DIV>
<DIV dir=ltr><FONT face=Arial color=#000000 size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial color=#000000 size=2>The problem I have is that the corporate servers don't work that way. We have three of them, and when a machine outside my domains makes a query, all of them are queried and route to one of my main servers. Unfortunately they always ask to the first one, and never repeat the query. The round-robin protocol seems to reset for each query, so my main servers only ask the primary servers downstream, fail, and the corporate servers return (and cache) a failure, thus rendering my failover structure useless for other domains. </FONT></DIV>
<DIV dir=ltr><FONT face=Arial color=#000000 size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial color=#000000 size=2>This could be solved modifying the configuration on the corporate server (politics!), or instructing the my main dns servers to always route queries to all servers downstream, and to serve the first result coming up. It's the same as using "all-servers", but downstream.<BR> <BR>Here is a small diagram (use monospace to see it):</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial color=#000000 size=2><FONT face="Courier New"> CORPORATE 172.30.0.1 (corporate.local)<BR> 172.30.0.2<BR> 172.30.1.1<BR> ||<BR> || *.mydomain.local<BR> ||<BR> MAIN 192.168.0.250 (main.mydomain.local)<BR> 192.168.0.251<BR> || ||<BR> sub1.mydomain.local || || sub2.mydomain.local<BR> || ||<BR> SUB1 192.168.1.250 192.168.2.250 SUB2<BR> 192.168.1.251 192.168.2.251</FONT></FONT></DIV>
<DIV dir=ltr><FONT face=Arial color=#000000 size=2></FONT> </DIV>
<DIV dir=ltr><FONT face=Arial color=#000000 size=2>server=/sub1.mydomain.local/192.168.1.250</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2>server=/sub1.mydomain.local/192.168.1.251</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2>server=/sub2.mydomain.local/192.168.2.250</FONT></DIV>
<DIV dir=ltr><FONT face=Arial size=2>server=/sub2.mydomain.local/192.168.2.251</FONT></DIV>
<DIV dir=ltr><FONT face=Arial color=#000000 size=2> <BR>Many thanks,</FONT></DIV>
<DIV dir=ltr><FONT face=Arial color=#000000 size=2></FONT> </DIV></DIV>
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<DIV>
<DIV><FONT face=Arial size=2><STRONG>Alberto Cuesta-Canada</STRONG></FONT></DIV></DIV>
<DIV><FONT face=Arial size=1>GaaS Team Lead</FONT></DIV>
<DIV><FONT face=Arial size=1>Excelian Ltd.</FONT></DIV>
<DIV><FONT face=Arial size=1>+44 (0) 7942633361</FONT></DIV></FONT></DIV></DIV><BR>
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