Methods to specify destination storage systems on the source

There are two methods of specifying destination storage systems on the source storage system.

• Specifying destinations using the snapmirror.access option
  You can specify the destination storage systems that are allowed access to the source storage system by using the snapmirror.access option. This option specifies which SnapMirror destination storage systems can initiate transfers, and which network interfaces they can use.This is the preferred method for controlling SnapMirror access on SnapMirror source storage systems.
• Specifying destinations using the snapmirror.allow file
  You can create a snapmirror.allow file in the /etc/ directory on the source system. You can create entries in the /etc/snapmirror.allow file to specify the destination storage systems that are allowed to copy data directly from the source system. If the snapmirror.access option is set to legacy (the default setting), the snapmirror.allow file defines the access permissions.
• Resolving host names to their IP addresses
  By default, the SnapMirror feature checks host names in the /etc/snapmirror.allow file against the host name sent from the destination storage system. Alternatively, you can set SnapMirror to resolve the host names in the /etc/snapmirror.allow file to their IP addresses and compare them with the IP address of the destination storage system.