Why srtt value for unreachable root name server decreases in dumpdb output in Red Hat Enterprise Linux 6

Solution Unverified - Updated -

Issue

  • I have two root DNS servers for redundancy.
  • After I disabled the network on one root DNS server, the srtt value for the unreachable root DNS server decreased little by little in dumpdb output.
  • In the following case, I disabled the network on the root DNS server with 192.168.100.1, and srtt value 192080 decreased to 184473, and to 177167
---------------------------------------------------------------------
　; Unassociated entries
　;       192.168.100.1 [srtt 192080] [flags 00002000] [ttl 1799]
　;       192.168.200.1 [srtt 422] [flags 00002000] [ttl 1799]
　---------------------------------------------------------------------
　; Unassociated entries
　;       192.168.100.1 [srtt 184473] [flags 00002000] [ttl 1799]
　;       192.168.200.1 [srtt 472] [flags 00002000] [ttl 1799]
　---------------------------------------------------------------------
　; Unassociated entries
　;       192.168.100.1 [srtt 177167] [flags 00002000] [ttl 1799]
　;       192.168.200.1 [srtt 462] [flags 00002000] [ttl 1799]
　---------------------------------------------------------------------
  • Why and how it's decreased?

Environment

Red Hat Enterprise Linux 6.5

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Using a Red Hat product through a public cloud?

How to access this content