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NSLOOKUP returns multiple DNS names for one IP

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    JDMils
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    #162573

    Each time I run this NSLOOKUP, irrespective of which machine I run it on, I get the following result:

    > set debug
    > 10.125.5.20
    Server: UnKnown
    Address: ::1

    ————
    Got answer:
    HEADER:
    opcode = QUERY, id = 4, rcode = NOERROR
    header flags: response, auth. answer, want recursion, recursion avail.
    questions = 1, answers = 3, authority records = 0, additional = 0

    QUESTIONS:
    20.5.125.10.in-addr.arpa, type = PTR, class = IN
    ANSWERS:
    -> 20.5.125.10.in-addr.arpa
    name = ipmgmt-uat.au.au.MyDomain.com
    ttl = 3600 (1 hour)
    -> 20.5.125.10.in-addr.arpa
    name = au-l387.MyDomain.com
    ttl = 900 (15 mins)
    -> 20.5.125.10.in-addr.arpa
    name = au-l598.MyDomain.com
    ttl = 900 (15 mins)

    ————
    Name: ipmgmt-uat.au.au.MyDomain.com
    Address: 10.125.5.20

    >[/CODE]

    Why is NSLOOKUP returning three different machine DNS names for the one IP??

    I’ve checked the DNS servers and DHCP servers and cannot find a reason for this.

    Thanks.[code]> set debug
    > 10.125.5.20
    Server: UnKnown
    Address: ::1


    Got answer:
    HEADER:
    opcode = QUERY, id = 4, rcode = NOERROR
    header flags: response, auth. answer, want recursion, recursion avail.
    questions = 1, answers = 3, authority records = 0, additional = 0

    QUESTIONS:
    20.5.125.10.in-addr.arpa, type = PTR, class = IN
    ANSWERS:
    -> 20.5.125.10.in-addr.arpa
    name = ipmgmt-uat.au.au.MyDomain.com
    ttl = 3600 (1 hour)
    -> 20.5.125.10.in-addr.arpa
    name = au-l387.MyDomain.com
    ttl = 900 (15 mins)
    -> 20.5.125.10.in-addr.arpa
    name = au-l598.MyDomain.com
    ttl = 900 (15 mins)


    Name: ipmgmt-uat.au.au.MyDomain.com
    Address: 10.125.5.20

    >[/CODE]

    Why is NSLOOKUP returning three different machine DNS names for the one IP??

    I’ve checked the DNS servers and DHCP servers and cannot find a reason for this.

    Thanks.

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