ServerNet Cluster 6780 Planning and Installation Guide (G06.24+, H06.03+)

Using the Long-Distance Option

ServerNet Cluster 6780 Planning and Installation Guide—527301-004

G-2

Hardware Requirements

To use the long-distance option, your cluster must meet these hardware requirements:

•

All processors on all NonStop S-series servers in the cluster must be S76000,

S86000, or later.

•

The cluster must be built with 6780 switches.

•

Zone-to-zone connections between 5 and 15 km can use either single-mode fiber-

optic cables or Dense Wave Division Multiplexers (DWDMs). A DWDM can

transmit multiple optical signals over a single fiber-optic connection and extend

optical signal strength.

•

If DWDMs are used, the connections between the 6780 switches and the DWDMs

must be single-mode fiber-optic cables.

Note. If DWDMs are not used, these requirements apply:

•

Your service provider must perform margin testing on the transceivers used for long-

distance connections that are between 10 and 15 km.

•

The margin test requires an attenuator fiber cable which can be ordered with the long-

distance option.

For more information on the margin test and its requirements, your service provider should

refer to hardware technical bulletin TB20041.