[dnsdist] Ipv4 and Ipv6 forwarding.

[Michael Van Der Beek]

Hi All,

Quick question..  I don't have ipv6 in my office.. but where I'll be deploying has IPv6.

So a configuration like
setLocal('<ipv4>:53')
addLocal('<ipv6>:53')
setACL({'0.0.0.0/0','::/0'})

newServer({address='<internal v4 IP>:200',name='authv4'})
newServer({address='<internal v6 IP:200',name='authv6'})

The question is. Incoming ipv6 dns queries.. will it forward via the authv4 server or the authv6 server IP?
This is for the purpose of statistics.  I want to be able to know how much v4 and v6 queries are arriving.
As far as I know.. as of 1.4 of dnsdist it does not have v6 statistics. So I have to rely on the auth server for statistics.

One other thing I discovered.. under load testing.
You can only have 4 threads specified, any more then that it will have almost 0 request to threads >4.
Where the 4 main threads can be maxed out.
An example of such is
#   Name                 Address                       State     Qps    Qlim Ord Wt    Queries   Drops Drate   Lat Outstanding Pools
0                        1.1.1.1:200                      up     0.0       0   1  1    1504653       0   0.0   0.6           0 auth
1                        1.1.1.1:200                      up     5.0       0   1  1    2990662       0   0.0   0.0           1 auth
2                        1.1.1.1:200                      up     0.0       0   1  1    2250348       0   0.0   0.1           0 auth
3                        1.1.1.1:200                      up 26180.7       0   1  1    2188805       0   0.0   0.0           0 auth
4                        1.1.1.1:200                      up 31209.6       0   1  1     956645       0   0.0   0.0           1 auth
5                        1.1.1.1:200                      up 16109.2       0   1  1    2119905       0   0.0   0.1           0 auth
6                        1.1.1.1:200                      up     0.0       0   1  1    1381596       0   0.0   0.3           0 auth
7                        1.1.1.1:200                      up 36056.9       0   1  1     862772       0   0.0   0.0           1 auth
All                                                          109558.0                  14255388       0

I have 8 (newServer) threads to the auth server. The auth server directly can handle 270K qps.
If I run 2 instances of 4 threads each.. total goes to 200K.. and so on.


Thanks a lot for your attention.

Regards,

Michael


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