16.10 - Finding All GC Servers in the Forest - Teradata Database

Teradata Database Security Administration

prodname
Teradata Database
vrm_release
16.10
created_date
June 2017
category
Administration
Security
featnum
B035-1100-161K

To manage site awareness through the GC you must determine which directory servers function as GC servers, using either the dig or nslookup utility.

This task is required because each directory server in the forest may be set up as:

  • A GC server only
  • Both a GC server and a domain server
  • A domain server only
  1. Use the following command to generate a list of GC servers:
    dig +tcp -t SRV _gc._tcp.rootdomain.com
    For instructions on finding the value of root_domain, see Finding the Root Domain Name.

    The dig command produces output similar to:

    ;; global options:  printcmd
    ;; Got answer:
    ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 65377
    ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 10, AUTHORITY: 5, ADDITIONAL: 17
    
    ;; QUESTION SECTION:
    ;_gc._tcp.rootdomain.com.         IN      SRV
    
    ;; ANSWER SECTION:
    _gc._tcp.rootdomain.com.  600     IN      SRV     0 100 3268 sdhq7602.DOMAIN1.COM.
    _gc._tcp.rootdomain.com.  600     IN      SRV     0 100 3268 sdhq7603.DOMAIN1.COM.
    _gc._tcp.rootdomain.com.  600     IN      SRV     0 100 3268 alban140.DOMAIN1.COM.
    _gc._tcp.rootdomain.com.  600     IN      SRV     0 100 3268 china7830.DOMAIN2.COM.
    _gc._tcp.rootdomain.com.  600     IN      SRV     0 100 3268 india7831.DOMAIN3.COM.
    _gc._tcp.rootdomain.com.  600     IN      SRV     0 100 3268 japan7832.DOMAIN4.COM.
    _gc._tcp.rootdomain.com.  600     IN      SRV     0 100 3268 sdhq7544.DOMAIN1.COM.
    
    ;; AUTHORITY SECTION:
    _tcp.rootdomain.com.      86400   IN      NS      sdint7857.DOMAIN1.COM.
    _tcp.rootdomain.com.      86400   IN      NS      socal7210.DOMAIN1.COM.
    _tcp.rootdomain.com.      86400   IN      NS      socal7211.DOMAIN1.COM.
    _tcp.rootdomain.com.      86400   IN      NS      socal7212.DOMAIN1.COM.
    _tcp.rootdomain.com.      86400  IN     NS     sdhq7562.DOMAIN1.COM.
    
    ;; ADDITIONAL SECTION:
    alban140.DOMAIN1.COM. 1800 IN      A      ip_address10

    The ANSWER SECTION lists the directory servers that have GC server capabilities, and it includes the alban140.DOMAIN1.COM server used in previous tasks. Note that 3268 is the default port for GC servers.

  2. Choose a GC directory in the ANSWER SECTION to facilitate site aware authentication of users who cross domain boundaries when they log on to a Teradata Database system or Unity server.