dnsauth2.sys.gtei.net has no NS records.
NS records for this zone are defined at sys.gtei.net.
NS records for this zone are defined at sys.gtei.net.
Question and response
Question
dig dnsauth2.sys.gtei.net. NS
Answer
The response has no answer records.
Authority
sys.gtei.net. 1800 SOA dnsauth1.sys.gtei.net. dns.level3.net. 2011090700 3600 900 864000 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0