How to influence forwarder selection BIND 9.7.3

antti-jussi.korjonen at nokia.com antti-jussi.korjonen at nokia.com
Mon Apr 23 12:19:34 UTC 2012


Hello

I have this kind of forwarders configuration. 192.168.100.1 has 3ms RTT
192.168.200.1 has 150ms RTT

options {
                forwarders {
                                192.168.100.1;
                                192.168.200.1;
};
};

Usually all queries go to 192.168.100.1 but occasionally it experiences
high load which obviously has effect on SRTT.
This causes that 12% of the queries are forwarded to 192.168.200.1.

I want that 192.168.200.1 is used only when 192.168.100.1 is down or is
experiencing really high latency.

I tried adding 192.168.100.1 multiple times in forwarders section but
it didn't help.

Is there any way around this?
Any way to manually tweak SRTT per server?

Regards,
Antti-Jussi Korjonen
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