If Edge DNS information appears incorrect

If Edge DNS does doesn’t seem to be handing out correct DNS information, use DNS notify.

If you have DNS NOTIFY configured on your primary name servers, they should notify the zone transfer agents when the zone file has changed and the zone transfer will be initiated.

If you don't have DNS NOTIFY configured on your primary name servers, there may be some latency between the time you update your master zone file and the time the data is propagated to the Edge DNS name servers.

If you are seeing this latency symptom, check the following:

  1. Ensure that the correct information is in the primary zone file on your primary name server.
  2. If you do not have DNS notify turned on, the zone transfer agents check with your primary name server at the refresh interval listed in your start of authority (SOA) record. The refresh interval is the second numeric field (in seconds) in your SOA record. For example:
    example.com 86400 IN SOA ns1.example.com.hostmaster.example.com. ( 2002010402 10800 3600 604800 86400 )

Example Parameters:

Parameter Description
86400 TTL (time to live)
IN Internet category of records
SOA Start of authority (a zone’s master record)
ns1.example.com One master authoritative name server
hostmaster.example.com Current customer contact information
2002010402 Serial number (higher is newer)
10800 Refresh frequency (wait time in seconds to check with master)
3600 Retry frequency
604800 Expiration delay (seconds to continue handing out answers if unable to check for updates)
86400 Negative TTL (The time to wait after getting a response saying it does not exist)

In this example, the refresh interval is 10800 seconds (= 180 minutes = 3 hours).

How to

  1. Log into Control Center.
  2. Go to > DNS SOLUTIONS > Edge DNS.
  3. On the Zone list page:
  4. Try querying each of the Edge DNS name servers serving your domain to see if they all return the same information.
    The Edge DNS system has built-in fault tolerance to account for the cases in which one zone transfer agent may not be able to reach one of the Edge DNS name servers; while data should not be inconsistent across the name servers, it is helpful to have this data point. You can query a specific name server using dig at the command line: dig @nameserver-ip hostname