[dns-operations] Limit on Name Servers & their IPs for a sub-domain
James.Stevens at jrcs.co.uk
Thu Jan 11 15:11:00 UTC 2018
I am aware of the "traditional" limit of 13 NS records for a sub-domain,
is it considered that this still applies?
A live test I ran indicated that multiple IPv4/IPv6 records for the name
name server get (roughly) the name number of queries.
But, I only tested a small number of address - is there some reason
(e.g. packet size, code restrictions, etc) that might mean more
addresses would not scale?
This suggests a theoretical unlimited servers for a sub-domain, so long
as they are represented as additional IP Addresses against the same name.
Is there any practical / theoretical / recommend limit ?
I have seen a lab test that used two Class-A addresses and showed that
all IPs received queries, but it was using a very limited range of
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