Address (A) records are DNS records that map a domain name to an IPv4 address.
You cannot delete Address records for a host participating in global server load balancing
(GSLB). However, the NetScaler deletes Address records added for GSLB domains when you
unbind the domain from a GSLB virtual server. Only user-configured records can be deleted
manually. You cannot delete a record for a host referenced by records such as NS, MX, or
CNAME.
To add an Address record by using the command line