In light of the GoDaddy outage we updated our name server list for our domain to include an additional name server provider. The list looks something like this:
Both Godaddy and Dreamhost have zone entries to handle the A and MX records. The idea is that if one provider goes out the other will be a fall-back.
However, when I tested my config with http://www.intodns.com/ I am getting a warning about SOA serials not being agreed.
Have I misunderstood some fundamentals in name-server config? What can I do to prevent future problems?