A–Specifications
Fabric Specifications
59265-02 B A-3
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 ....................................
1.0625, 2.125, 4.250, or 8.50Gbps
12.750 or 25.50Gbps
Maximum Frame Size..................... 2,148 bytes (2112-byte payload)
System Processor........................... 400MHz 440EP processor
Fabric Latency (intra-switch)
2Gbps to 2Gbps..............................
4Gbps to 4Gbps..............................
8Gbps to 8Gbps..............................
10Gbps to 10Gbps..........................
20Gbps to 20Gbps..........................
< 0.6 µs
< 0.3 µs
< 0.2 µs
< 0.2 µs
< 0.2 µs
Bandwidth
Point-to-Point .................................
Aggregate (single switch) ...............
425MB, full duplex @ 2Gbps
850MB, full duplex @ 4Gbps
1,700MB, full duplex @ 8Gbps
2,550MB, full duplex @ 10Gbps
5,100MB, full duplex @ 20Gbps
Up to 54.40GB full duplex
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