You need to create a CNAME record.  CelerraHostname.business.com -> IsilonHostname.business.com in your example.  Where CelerraHostname.business.com is the alias and IsilonHostname.business.com is the FQDN for the target host.
How to create DNS aliases for an Isilon smart connect zone ? The isilon system is in production and is accessed via (IsilonHostname.business.com) FQDN name. The Celerra data needs to be migrated over to Isilon and copy is in final stage and needs to do a cut-over and take on the old Celerra name to Isilon. There is only one Smart Connect Zone called "System" and the DNS aliases are created like this below. What should be the DNS entry for "CelerraHostname.business.com" in DNS server and where should it point to so that users can still use Celerra name after the cutover ?   How this requirement can be fulfilled without creating a new smart connect zone and creating NS record and point to SSIP. There are 3 more Celerras to be migrated to Isilon and don't want to create smart connect zone each time. There should be a way of creating aliases for Isilon smart connect zones.  Thanks in advance.
Isilon DNS alias