Same Transaction ID queries

Mark Andrews marka at isc.org
Sun Feb 5 05:42:37 UTC 2012


In message <CAH14rHi==V=BG4AZUGTuO0m7ruQC+WiK3hRko=Oky1LEpDf0mA at mail.gmail.com>
, Samer Khattab writes:
> Hi all,
> 
> We have an observation for some queries where BIND caching server receives
> multiple queries (three or four,  A or AAAA) for a domain name, with the
> same transaction ID in the DNS header in all query packets, and one
> response packet is sent back from the server only for these queries.
> 
> The client IP,source port and Server IP is the same in these queries.
> 
> Is this the right BIND behavior in this case or it is an issue.

It is expected behavior.
 
> Regards,
> Samer Khattab
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org



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