F-tile Architecture and PMA and FEC Direct PHY IP User Guide

ID 683872
Date 12/15/2021
Public

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2.2.2.10. Implementing 100GbE-1, 100GbE-2, and 50GbE-1 Interfaces with 400G Hard IP and FHT

This example needs:
  • One fracture of type st_x4 for the 100GbE-2 interface
  • One fracture of type st_x4 for the 100GbE-1 interface
  • One fracture of type st_x2 for the 50GbE-1 interface
  • Two PMAs for the 100GbE-2 interface
  • One PMA for the 100GbE-1 interface
  • One PMA for the 50GbE-1 interface
Placement Order Fracture Index PMA Mapping
Possible fracture index and PMA mapping option 1 (See Figure 27.):
Interface 1: 100GbE-2 st_x4_0 FHT3, FHT2
Interface 2: 100GbE-1 st_x4_2 FHT1
Interface 3: 50GbE-1 st_x2_6 FHT0
Possible fracture index and PMA mapping option 2:
Interface 1: 100GbE-2 st_x4_0 FHT3, FHT2
Interface 2: 50GbE-1 st_x2_2 FHT1
Interface 3: 100GbE-1 st_x4_3 FHT0
Unsupported fracture index and PMA mapping option 1 (See Figure 28.):
Interface 1: 100GbE-1 st_x4_0 FHT3
Interface 2: 100GbE-2 st_x4_1 FHT1, FHT0
Interface 3: 50GbE-1 The 50GbE-1 interface cannot be placed because there are no available st_x2 fractures (for example, st_x2_4 or st_x2_5 ) that can map to FHT2. FHT2
Unsupported fracture index and PMA mapping option 2 (See Figure 29 and Figure 30.):
Interface 1: 100GbE-2 st_x4_0 FHT3, FHT2
Interface 2: 100GbE-1 st_x4_2 FHT1
Interface 3: 50GbE-1 st_x2_3 This mapping is not possible because it creates a crisscross connection between the PMAs. FHT0
Figure 27. Implementing 100GbE-1, 100GbE-2, and 50GbE-1 Interfaces with 400G Hard IP and FHT Option 1
Figure 28. Unsupported 100GbE-1, 100GbE-2, and 50GbE-1 Interfaces Implementation with 400G Hard IP and FHT Option 1
Figure 29. Unsupported 100GbE-1, 100GbE-2, and 50GbE-1 Interfaces Implementation with 400G Hard IP and FHT Option 2
Figure 30. Unsupported Crisscross Connection Implementation of 100GbE-1, 100GbE-2, and 50GbE-1 Interfaces with 400G Hard IP and FHT Option 2

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