If the resolver detects that a name server is not being responsive, a series of network operator messages is issued that relate to that name server. For example, if a name server is operating at IP address 10.42.35.200 and the UNRESPONSIVETHRESHOLD value is 25, then the following sequence of messages might be generated by the resolver:
EZZ9308E UNRESPONSIVE NAME SERVER DETECTED AT IP ADDRESS 10.42.35.200
EZZ9310I NAME SERVER 10.42.35.200
TOTAL NUMBER OF QUERIES SENT 6000
TOTAL NUMBER OF FAILURES 2100
PERCENTAGE 35%
EZZ9310I NAME SERVER 10.42.35.200
TOTAL NUMBER OF QUERIES SENT 3000
TOTAL NUMBER OF FAILURES 1650
PERCENTAGE 55%
This message and the statistical information for the name server are issued at 5-minute intervals for as long as the resolver considers the name server to be unresponsive.
EZZ9309I NAME SERVER IS NOW RESPONSIVE AT IP ADDRESS 10.42.35.200
EZZ9310I NAME SERVER 10.42.35.200
TOTAL NUMBER OF QUERIES SENT 4500
TOTAL NUMBER OF FAILURES 675
PERCENTAGE 15%
The resolver issues individual messages for each name server that it considers to be unresponsive at the end of a given monitoring interval. Because the resolver calculates the responsiveness of a name server by using a sliding 5-minute interval, messages might be issued for different name servers at different times, rather than notifications about all unresponsive name servers being issued at the same time.