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Resolving host names to their IP addresses

By default, SnapMirror checks host names in the /etc/snapmirror.allow file against the host name sent from the destination 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 system.

Before you begin

The /etc/snapmirror.allow file entry must map to the IP address of the originating network interface on the destination system. For example, if the request comes from the IP address of a Gigabit Ethernet interface e10 named systemA-e10, then the /etc/snapmirror.allow file must contain systemA-e10 or so that the name resolves to the correct IP address.

About this task

The snapmirror.checkip.enable option controls how the host names are checked. When the option is off, which is the default, the entries in the /etc/snapmirror.allow file must match the host name of the destination system reported by the hostname command. When the option is on, the source system resolves the names in the snapmirror.allow file to IP addresses and then checks for a match with the IP address of the requesting destination system. In this mode, literal IP addresses (for example, and fully qualified names (for example, can be valid entries in the /etc/snapmirror.allow file.
Note: A local SnapMirror relationship, between two volumes on the same system, does not require an entry in the /etc/snapmirror.allow file.


  1. To configure SnapMirror to resolve host names to their IP addresses, enter the following command on the source system:options snapmirror.checkip.enable on