A question regarding the db.cache file

[JINMEI Tatuya / 神明達哉]

>>>>> On Wed, 20 Jul 2005 16:43:55 +0100,=20
>>>>> Paul Roberts <red3kgto at hotmail.com> said:

>> What if I instead of using the db.cache file list my name servers as=20
>> forwarders in the named.conf file. That means having my DNS server=20
>> configured as a forwarding-only DNS server (recursive mode). Let's say t=
hat=20
>> I have two DNS servers listed in the forwarders statement in the named.c=
onf=20
>> file.
>>=20
>> How does this algorithm work? Does it work the same way as when I had my=
=20
>> name servers in the db.cache file? Will named still query booth DNS serv=
ers=20
>> initially and find out the RTT, and then use the one with the lowest RTT=
 as=20
>> primary?

> BIND 9 doesn't have RTT calculation for forwarders so will query them in =

> the order they are specified in named.conf. Not sure if this is in BIND=20
> 9.3 yet? Anyone else know?

=46rom quick inspection of the code, BIND 9.3.1 seems to sort forwarders
based on their RTTs.

					JINMEI, Tatuya
					Communication Platform Lab.
					Corporate R&D Center, Toshiba Corp.
					jinmei at isl.rdc.toshiba.co.jp