Caching server, forwarder list, dns failure

[phn at icke-reklam.ipsec.nu]

Jean-Robert.Huon at alcatel.fr wrote:



> phn at icke-reklam.ipsec.nu a =E9crit :
>>=20
>> Jean-Robert.Huon at alcatel.fr wrote:
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>> > Hello,
>>=20
>> > I looked in FAQ and archives, but I could not find any answer to my
>> > problem.
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>> > We are running a caching only server with a "forwaders @ip-dns1
>> > @ip-dns2" line in the Named.boot file.
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>> > @ip-dns1 and @ip-dns2 are the addresses of 2 DNS acting as main/backup
>> > servers.
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>> > Everything is running well except when the "main" dns (e.g @ip-dns1)
>> > fails.
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>> > When this failure occurs, and when a new name resolution is asked, Named
>> > tries normally the @ip-dns1 dns but seems to be "sticked" forever with
>> > it before to decide that this dns shall be down and that it has to try
>> > with @ip-dns2.
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>> > I would be very interested to know if the behavior of Named upon such a
>> > failure is configurable in order that it decides to check the next dns
>> > in the forwarders list after a couple of seconds (time limit).
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>> You seem to be running bind-4.
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>> Bind-8 ( current & recommended version 8.3.3 ) deals much better with
>> multiple forwarders; it measures RTT of all forwarders and uses the
>> one that answers quickest.
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>> > Thanks in advance for any help
>>=20
>> > regards
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>> > Jean-Robert
>>=20

> Unfortunately, the Bind-4 I use may not be updated to Bind-8 or 9.

> Do you have any information about the "multiple forwarders" dealing or a
> link upon such a subject ?

> Thanks for your help

> jean-Robert

Yes i have information. Download or build a recent bind-8 and replace 
your bind-4.

What OS is used ? Is there any problems in upgrading ?

-- 
Peter Håkanson         
        IPSec  Sverige      ( At Gothenburg Riverside )
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