Network World
Thursday, December 4, 2008
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The latency is not very high on GigabiteEthernet interface

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Per RFC 2544, latency is measured at, and only at, the throughput rate, which in this case was line rate.

RFC 4689 introduces a related metric, forwarding delay, that can be measured at any intended load, not just the throughput rate. Whenever I refer to latency, it's always at the throughput rate; for any other load I refer to the measurement as delay or forwarding delay.

I do not agree that these measurements are high; in fact they're either in line with or lower than similar devices I've tested. See, for example, the seven-switch comparison Network World published in March.

Finally, I go by David, not Dave, and normally don't like responding to anonymous posts. Question for you, "anonymous": Who are you?

Regards,
David Newman

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