what are the best monitoring and configuring tool for snapmirror for both 7 mode and cluster mode.
You can use system manager to configure Snapmirror, you can monitor the status of the relation also under Data Protection tab.
Depending on your requirement and version on ONTAP you can use Oncommand Unified Manager too. Please look at the link http://community.netapp.com/t5/Technology/Hey-Clustered-Data-ONTAP-Customers-OnCommand-Unified-Manager-6-0-Is-Available/ba-p/82178
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