Unable to look up zone sencia.ca [BIND 8.4].

[Jeff Wark]

I should make a note as well.  Each time we experience trouble with this customer, they have taken a name server of theirs offline 
to move it.  Sometimes it is for a few minutes, sometimes for a couple hours.  However, once one of their servers is offline, we 
seem to be stuck and unable to look up their hosted domains.

On Fri, 12 Oct 2007 09:57:52 -0400
  Jeff Wark <jwark at tbaytel.net> wrote:
>> This morning we received a call from a customer [we're a small ISP].  They said that people from our ISP were unable to lookup 
>> domains on their name servers.  The domain is 'sencia.ca'.
>> 
>> Sure enough, when I did a simple 'host sencia.ca', the connection timed out.  I then issued the 'dumpdb' command from the ndc 
>> prompt.  This is the resulting information:
>> 
>> *snip*
>> $ORIGIN ca.
>> 
>> sencia  1473    IN      NS      ns2.s7host.net. ;Cr=addtnl [129.33.164.73]
>>         1473    IN      NS      ns1.s7host.net. ;Cr=addtnl [129.33.164.73]
>> 
>> 
>> $ORIGIN NET.
>> s7host  1400    IN      NS      ns1.s7host.net. ;Cr=addtnl [192.5.6.30]
>>         1400    IN      NS      ns2.s7host.net. ;Cr=addtnl [192.5.6.30]
>> 
>> $ORIGIN s7host.NET.
>> ns2     1400    IN      A       24.109.252.254  ;NT=134 Cr=answer [192.5.6.30]
>> ns1     1400    IN      A       216.211.21.143  ;NT=20401 Cr=answer [192.5.6.30]
>> *snip*
>> 
>> It seems as though we had all the information required to lookup the A record for sencia.ca, but it didn't do it. 
>> Interestingly 
>> enough, after the database dump, both of our name servers looked up the host without problem.
>> 
>> We are running BIND 8.4.6-1 which is the version number in Debian Sarge.
>> Does anyone have any ideas as to why this problem may be occurring?  Any input would be appreciated.
>> 
>> 
>> Jeff Wark
>> TBayTel Internet
>> 
>> 

Jeff Wark
TBayTel Internet