Appendix C
Advanced Fiber Optic Connections
The NSG family supports advanced fiber optic cabling schemes,
including cascading of NSG devices, cascading with IP switching, DWDM
links and GbE channel redundancy.
Cascading
The NSG family uses the cascading option to optimize the GbE
bandwidth by chaining any number of NSGs together. Each NSG device
draws the services intended for it and passes on all the traffic so a total of
one Gigabit is used.
Cascading with IP switching allows to optimize the GbE bandwidth by
using three NSG 9116 units that are fed by two GbE inputs.
Cascading Single Channels
Cascading single channels is recommended when using two NSG 9112
units.
To cascade NSGs using a single GbE channel (and no channel
redundancy):
1. Connect the switch Tx to the GbE1 Rx connector on the first NSG in
the chain.
2. Connect the NSG GbE1 Tx to the next NSG GbE1 Rx.
Continue chaining until you reach the last NSG in the chain.
3. Connect the last NSG GbE1 Tx to the switch Rx.
4. Select the last NSG in the chain. Activate the Last in Chain option. For
further information refer to the NSG Online Help.
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