McDATA Eclipse 2640 SAN Technické informace stáhnout pdf (Strana 185)

100

101

Monitoring SAN Router Operation and Connections

6-37

Viewing Statistics

Wrapping Counters The SAN Router stores information in counters with a maximum

value of four billion. When this value is reached, the counter resets to

zero and the count begins again. When reporting statistics such as the

number of bytes received or transmitted, the counter can quickly fill

if the port is operating at full line rate. For a 1 Gbps FC port, this

counter can wrap in as little as 31 seconds. If the graph poll rate is set

at a period longer than this, the reported statistics can report incorrect

results. Be sure to set the graph’s polling period to accommodate the

rate of traffic across the monitored port.

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McDATA Eclipse 2640 SAN Technické informace Strana 185

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