ISPConfig as secondary DNS server

How we can achieve DNS delegation in ispconfig3?
For eg. we have parent domain abc.com which is hosted on other DNS server but i want to host test.abc.com on my ISP config DNS server.
Kindly note both domain are currently hosted on same DNS. i want to move subdomain test.abc.com to ispconfig server without disturbing its parent domain.
How can i do this?

 

Thanks for the replay its working now.

 

Thanks for the reply,
DNS delegation is working fine.
NOw my i am getting problem in apache,My httpd service is getting hanged.
I need to restart it everytime.When i checked the status of my httpd service i am getting below error,
# systemctl status httpd.service

httpd.service - The Apache HTTP Server
Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled)
Active: active (running) since Mon 2016-03-07 13:18:31 IST; 15min ago
Docs: man:httpd(8)
man:apachectl(8)
Process: 19711 ExecStop=/bin/kill -WINCH ${MAINPID} (code=exited, status=0/SUCCESS)
Main PID: 19721 (httpd)
Status: "Total requests: 33; Current requests/sec: 0; Current traffic: 0 B/sec"
CGroup: /system.slice/httpd.service
ââ19721 /usr/sbin/httpd -DFOREGROUND
ââ19724 /usr/sbin/httpd -DFOREGROUND
ââ19726 /usr/sbin/httpd -DFOREGROUND
ââ19727 /usr/sbin/httpd -DFOREGROUND
ââ19728 /usr/sbin/httpd -DFOREGROUND
ââ19729 /usr/sbin/httpd -DFOREGROUND
ââ19730 /usr/sbin/httpd -DFOREGROUND
ââ19784 /usr/bin/php-cgi -d magic_quotes_gpc=off -d session.save_path=/usr/local/ispconfig/interface/temp
ââ19786 /usr/bin/php-cgi -d magic_quotes_gpc=off -d session.save_path=/usr/local/ispconfig/interface/temp
ââ19797 /usr/bin/php-cgi -d magic_quotes_gpc=off -d session.save_path=/usr/local/ispconfig/interface/temp
ââ19798 /usr/bin/php-cgi -d magic_quotes_gpc=off -d session.save_path=/usr/local/ispconfig/interface/temp
ââ19802 /usr/bin/php-cgi -d magic_quotes_gpc=off -d session.save_path=/usr/local/ispconfig/interface/temp
ââ19804 /usr/bin/php-cgi -d magic_quotes_gpc=off -d session.save_path=/usr/local/ispconfig/interface/temp
ââ19809 /usr/sbin/httpd -DFOREGROUND
ââ19810 /usr/sbin/httpd -DFOREGROUND
ââ19812 /usr/sbin/httpd -DFOREGROUND
ââ19814 /usr/sbin/httpd -DFOREGROUND
ââ19815 /usr/sbin/httpd -DFOREGROUND

Mar 07 13:18:31 ns1.abc.com systemd[1]: Starting The Apache HTTP Server...
Mar 07 13:18:31 ns1.abc.com httpd[19721]: AH00548: NameVirtualHost has no effect and will be removed in the next release /etc/httpd/conf/h...conf:355
Mar 07 13:18:31 ns1.abc.com systemd[1]: Started The Apache HTTP Server.
Mar 07 13:19:02 ns1.abc.com suexec[19784]: uid: (1002/ispconfig) gid: (1003/ispconfig) cmd: .php-fcgi-starter
Mar 07 13:19:03 ns1.abc.com suexec[19797]: uid: (1002/ispconfig) gid: (1003/ispconfig) cmd: .php-fcgi-starter
Mar 07 13:19:03 ns1.abc.com suexec[19798]: uid: (1002/ispconfig) gid: (1003/ispconfig) cmd: .php-fcgi-starter
Mar 07 13:34:08 ns1.abc.com systemd[1]: Started The Apache HTTP Server.
Hint: Some lines were ellipsized, use -l to show in full.


Kindly note i am using ISPConfig3 only DNS on centos 7(64 bit)

 

DNS delegation is possible in ISPConfig?
My parent domain(example.com) will be hosted on ISPconfig server and subdoamin(abc.example.com) will be hosted with some other service provider.
will it possible in ISPConfig?