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.
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 “systemA-e10. acme.com” so the name resolves to the correct IP address.
Considerations
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, 123.45.67.89) and fully qualified names (for example, systemA.acme.com) can be valid entries in the
/etc/snapmirror.allow file.
A local SnapMirror relationship, between two volumes on the same storage system, does not require an entry in the /etc/snapmirror.allow file. To configure SnapMirror to resolve host names to their IP addresses, complete the following step.
Step
- On the source storage system, enter the following command:options snapmirror.checkip.enable on
