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Dell SRDF Introduction

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Cascaded SRDF/Star with R22 devices

Cascaded SRDF/Star can use R22 devices to pre-configure the SRDF pairs that are required to incrementally establish an SRDF/A session between Site A and Site C in case Site B fails.

This example shows cascaded R22 devices in a cascaded SRDF solution.

Figure 1. R22 devices in cascaded SRDF/Star
R22 devices in cascaded SRDF/Star
In cascaded SRDF/Star configurations with R22 devices:
  • All devices at the production site (Site A) must be configured as concurrent (R11) devices paired with R21 devices (Site B) and R22 devices (Site C).
  • All devices at the synchronous site in Site B must be configured as R21 devices.
  • All devices at the asynchronous site in Site C must be configured as R22 devices.

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