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Software > OpenVMS Systems > Ask the Wizard ![]() HP OpenVMS Systemsask the wizard |
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The Question is: We are implementing Dark Fibre as a solution for a remote VMS cluster. What is acceptable span loss for a VMS cluster? The Answer is : Dark fiber typically indicates that customer equipment is used with the fiber-optic connection. Please contact your fiber-optic communications device vendor for assistance in correctly configuring the fiber-optic connection -- most fiber-optic communications devices require a minimum required loss (variously measured in dB), and this can be provided via sufficient cabling or via the installation of appropriate attenuation filters. Neither span loss nor in-line loss elements (attenuators) are features or considerations of an OpenVMS Cluster configuration. The OpenVMS Cluster software deliberately does not know nor does it particularly care about the underlying connection -- the OpenVMS Cluster software only expects the underlying communications to provide the specified latency and bandwidth.
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