Hi, all
I deployed a cluster of DNS which combined with a master and two slaves
recently. I opened the response rate limiting function in slaves, which
parameters like below:
rate-limit {
ipv4-prefix-length 32;
responses-per-second 250;
all-per-second 1000;
min-table-size 1000000;
max-table-size 5000000;
log-only no;
};
But even with this configuration, there were still some dns queries dropped
cause the RRL. I viewed the rrl.h and noticed the max rrl rate are defined like
this:
#define DNS_RRL_MAX_RATE 1000
And "all-rer-second” shouldn’t larger than DNS_RRL_MAX_RATE.
So could anybody tell me why DNS_RRL_MAX_RATE defined 1000? And is there any
other methods to bypass this limits?
Thanks and Regards, Zhiyong Cheng
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