Slave/secondary DNS nameserver
- by user114671
I'm learning about DNS and have a very basic, generic question about DNS but I can't find an answer anywhere.
I have DNS for a few domains set up as follows:
- master records with DNS company A
- slave records with DNS company B
Company A's nameservers are:
ns1.companyA.com.
ns2.companyA.com.
ns3.companyA.com.
ns4.companyA.com.
ns5.companyA.com.
and company B has three slaves:
ns6.companyB.com.
ns7.companyB.com.
ns8.companyB.com.
Everything works fine transferring the records between the nameservers and keeping them in sync.
But my question is:
The registrar of my domain example.com allows me to choose 4 nameservers only. Do I just pick the first 4 for company A, or do I need to include 1 or more of company B's slave nameservers too?