Centrify DirectControl, Centrify Identity Service, Mac Edition, Centrify DirectAudit
KB-1664: adcheck reports "marginal" for one of the DNS server, what does it mean ?
Applies to: All versions of Centrify DirectControl.
adcheck reports "marginal" when checking DNS servers.
For example in the output below, it is noticed the first DNS server is reported as "marginal". What does "marginal" mean ?
dhcp1 # ./adcheck-sol8-sparc.datseas.yourcompany.com -t net -V adcheck (CentrifyDC 4.4.0-362)
Host Diagnostics uname: SunOS dhcp1 5.10 Generic_141444-09 sun4v OS: SunOS Version: 5.10 Number of CPUs: 24 Inspecting DNS configuration Configured DNS servers are: - 220.127.116.11 (ns2.yourcompany.com ) UDP OK, response time = 0.1063 UDP OK, response time = 0.0017 UDP OK, response time = 0.0017 UDP OK, response time = 0.0017 UDP OK, response time = 0.0016 TCP OK, response time = 0.0007 18.104.22.168 (ns3.yourcompany.com ) UDP OK, response time = 0.0029 UDP OK, response time = 0.0029 UDP OK, response time = 0.0029 UDP OK, response time = 0.0029 UDP OK, response time = 0.0028 TCP OK, response time = 0.0019 IP Diagnostics Local host name: dhcp1 Local IP Address: 22.214.171.124 Not found in DNS!Make sure it is in Reverse Lookup Zone. FQDN host name: FQDN host name:dhcp1 (domain missing?) look for local ssh server - found SSH-2.0-Sun_SSH_1.1.3 NSHOSTS : Check hosts line in /etc/nsswitch.conf : Pass DNSPROBE : Probe DNS server 126.96.36.199 : Pass DNSPROBE : Probe DNS server 188.8.131.52 : Pass DNSCHECK : Analyze basic health of DNS servers : Warning : One or more DNS server are dead or marginal : You might be able to continue but it is very likely that you will have problems : Check the following IP addresses in /etc/resolv.conf : : The following table lists the state of all configured DNS servers : 184.108.40.206 (ns2.yourcompany.com ): marginal : 220.127.116.11 (ns3.yourcompany.com): OK
1 warnings were encountered during check. We recommend checking these before proceeding.
adcheck checks the readiness of machine to join an Active Directory domain. The adcheck command performs operating system, network, and Active Directory tests to verify that a machine is ready to join the specfied Active Directory domain.
In the command "adcheck-sol8-sparc.datseas.yourcompany.com -t net -V"
The flag -t means "Run only one of the tests", -V means verbose and -net means "Run the network check" to check for response time.
adcheck reports "marginal" if the response time from any of the DNS servers is greater than 0.1 sec ( > 1/10 of a sec).
"UDP OK, response time = 0.1063".
You can check why the DNS server is taking time (> 0.1 sec) to respond or simply ignore the message and proceed with the install or join.
Future releases of DirectControl will do some fine tuning or improve the verbiage "marginal".