Bandwidth; Latency - Qlogic SANbox2-8c Installation Manual

D
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
Source Port Rate
1 Gbps
1 Gbps
1 Gbps x 2 ports
2 Gbps
2 Gbps
Bandwidth will be less for larger sequence sizes.
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.
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
1 Gbps - 1 Gbps
2 Gbps - 2 Gbps
59042-03 A
Table
Table 3-1. Port-to-Port Transmission Combinations
1 Gbps
2 Gbps
2 Gbps
1 Gbps x 2 ports
2 Gbps
Table 3-2. Port-to-Port Latency
Source/Destination Rates
3-1.
Destination Port Rate
Table 3-2.
< 1 µsec
< 0.4 µsec
3 – Planning
Performance
Maximum Bandwdith
100 MB
100 MB
200 MB
100 MB each port
1
200 MB
Same Switch I
3-7