Jesper Dangaard Brouer wrote:
The Linux traffic's control engine inaccurately calculates transmission times for packets sent over ADSL links. For some packet sizes the error rises to over 50%. This occurs because ADSL uses ATM as its link layer transport, and ATM transmits packets in fixed sized 53 byte cells.
I could have sworn that DSL uses its own framing protocol that is similar to the frame/superframe structure of HDSL ( T1 ) lines and over that you can run ATM or ethernet. Or is it typically ethernet -> ATM -> HDSL?
In any case, why does the kernel care about the exact time that the IP packet has been received and reassembled on the headend?
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