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A – Specifications
Fabric Specifications
59265-00 A A-3
A
Scalability........................................ Maximum 239 switches depending on
configuration
Maximum User Ports ...................... > 475,000 ports depending on
configuration
Buffer Credits.................................. 16 buffer credits per port, ASIC embedded
memory
Media Type
Ports 0-19 .......................................
Ports 20-23 .....................................
SFP optical transceiver
XPAK switch stacking cables
Fabric Port Speed
Ports 0-19 .......................................
Ports 20-23 .....................................
2.125, 4.250, or 8.50 Gbps
12.750 or 25.50 Gbps
Maximum Frame Size..................... 2148 bytes (2112 byte payload)
System Processor........................... 400 MHz 440EP processor
Fabric Latency (intra-switch)
2-Gbps to 2-Gbps ...........................
4-Gbps to 4-Gbps ...........................
8-Gbps to 8-Gbps ...........................
10-Gbps to 10-Gbps .......................
20-Gbps to 20-Gbps .......................
< 0.6 µsec
< 0.3 µsec
< 0.2 µsec
< 0.2 µsec
< 0.2 µsec
Bandwidth
Point-to-Point .................................
Aggregate (single switch) ...............
425 MB, Full Duplex @ 2-Gbps
850 MB, Full Duplex @ 4-Gbps
1700 MB, Full Duplex @ 8-Gbps
2550 MB, Full Duplex @ 10-Gbps
5100 MB, Full Duplex @ 20-Gbps
Up to 23.80 GB Full Duplex
Table A-1. Fabric Specifications (Continued)