HP StorageWorks Storage Mirroring Replicate User's Guide (T5437-96010, November 2009)

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Hardware ports
You need to configure your hardware so that all of the above ports for both Storage
Mirroring Replicate and Microsoft Windows are open. Since communication occurs bi-
directionally, make sure you configure both incoming and outgoing traffic.
There are many types of hardware on the market, and each can be configured differently.
See your hardware reference manual for instructions on setting up your particular router.