OpenView Network Node Manager: Designing and Implementing an Enterprise Solution

Who Resolves DNS Problems?

Domain name servers are organized in a distributed hierarchy. Authority for the information they serve is delegated to authoritative sites, so it isn’t unusual to have many host masters. Any or all of them may be able to take credit when a problem raises its head. Typical DNS problems include:

• a name server is lame

• a record is deleted

• reverse lookups fail

• old data is returned

• a lookup times out

• the wrong name server is authoritative

• some router interface IP addresses are not returned

• forward and reverse translations don’t match

The host masters get their information from system administrators. If a router administrator doesn’t supply all the IP addresses in a router to the host master, then credit belongs to the router administrator. ...