SB2A-16A Qlogic Corporation, SB2A-16A Datasheet - Page 43

• Manufacturer Part Number: SB2A-16A
• Description: Development Tools, SANbox 16-port Switch
• Manufacturer: Qlogic Corporation

3.3.2
Bandwidth
3.3.3
Latency
59021-06 A
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
1
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 in-order-delivery with any number of links
between chassis.
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
Bandwidth will be less for larger sequence sizes.
1 Gbps
1 Gbps
1 Gbps x 2 ports
2 Gbps
2 Gbps
1 Gbps - 1 Gbps
2 Gbps - 2 Gbps
Source Port Rate
Source/Destination Rates
Table 3-1. Port-to-Port Transmission Combinations
Table 3-2. Port-to-Port Latency
Table
1 Gbps
2 Gbps
2 Gbps
1 Gbps x 2 ports
2 Gbps
Table
Destination Port Rate
3-1.
3-2.
< 1 µsec
< 0.4 µsec
Same Switch I
100 MB
100 MB
200 MB
100 MB each port
200 MB
Maximum Bandwdith
Performance
3 – Planning
1
3-7