Q
3 – Planning Performance
3.3.2
Bandwidth
Bandwidth is a measure of the volume of data that can be transmitted at a given transmission rate. A port can transmit or receive at 1 Gbps or 2 Gbps depending on the device to which it is connected. The switch supports all transmission rate combinations as shown in Table
Table 3-1. Port-to-Port Transmission Combinations
| Source Port Rate |
| Destination Port Rate | Maximum Bandwdith | |
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1 Gbps | 1 Gbps | 100 MB | |||
1 Gbps | 2 Gbps | 100 MB | |||
1 | Gbps x 2 ports | 2 | Gbps | 200 | MB |
2 | Gbps | 1 | Gbps x 2 ports | 100 | MB each port1 |
2 Gbps | 2 Gbps | 200 MB | |||
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1Bandwidth will be less for larger sequence sizes.
In multiple chassis fabrics, each link between chassis contributes 100 or 200 megabytes of bandwidth between those chassis. When additional bandwidth is needed between devices, increase the number of links between the connecting switches. The switch guarantees
3.3.3
Latency
Latency is a measure of how fast a frame travels from one port to another. The factors that affect latency include transmission rate and the source/destination port relationship as shown in Table
Table 3-2. Port-to-Port Latency
Source/Destination Rates | Same Switch |
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1 Gbps - 1 Gbps | < 1 µsec |
2 Gbps - 2 Gbps | < 0.4 µsec |
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