Packet Loss: Difference between revisions
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The best measure of loss as a simple percentage is the loss when sending full size packets (1500 bytes) which is what the data transfer protocols (like TCP) use. Even a 1% or 2% of loss of such packets can cause TCP to slow down massively. It does not work like taking away a couple of percent of speed - the data transfers keep slowing down as they keep thinking the line must be full. |
The best measure of loss as a simple percentage is the loss when sending full size packets (1500 bytes) which is what the data transfer protocols (like TCP) use. Even a 1% or 2% of loss of such packets can cause TCP to slow down massively. It does not work like taking away a couple of percent of speed - the data transfers keep slowing down as they keep thinking the line must be full. |
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[[File:CQM-heavyloss.png| |
[[File:CQM-heavyloss.png|Heavy packetloss.]] |
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Packet loss on an idle line is always bad news... |
Packet loss on an idle line is always bad news... |
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[[File:CQM-lowloss.png|border|An FTTC line with 1-3% loss |
[[File:CQM-lowloss.png|border|An FTTC line with 1-3% loss]] |
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...even if only 1% (one red dot at the top is 1%) |
...even if only 1% (one red dot at the top is 1%) |
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