McDATA 4314 Guía de instalación descargar pdf (Pagina 25)

Planning

2-5

Performance

ports if the combined destination bandwidth is greater than or equal to the

source bandwidth.

In multiple chassis fabrics, each link between chassis contributes 106 or 212

MB of bandwidth between those chassis depending on the speed of the link.

When additional bandwidth is needed between devices, increase the number

of links between the connecting switches. The switch module guarantees

in-order-delivery with any number of links between chassis.

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 2-2.

Table 2-2. Port-to-Port Latency

Destination Rate

Source Rate

Gbps 1 2

< 0.6 µsec

< 0.8 µsec

Based on minimum frame size of 36 bytes. Latency increases for larger frame sizes.

< 0.5 µsec < 0.4 µsec

1 2 ... 20 21 22 23 24 25 26 27 28 29 30 ... 67 68

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McDATA 4314 Guía de instalación Pagina 25