Brian Utterback wrote: > Decreased bandwidth means increased latency. The two are related.
Only indirectly so. There are at least two components to the higher latency on the ADSL uplink as compared to the downlink. A minor component is the fact that the lower bitrate means that equal-sized packets are in flight longer on the uplink than they are on the downlink. The main component is however that there is a transmit queue in the CPE that packets take a while to get through before actually being sent up the link, particularly under load. So this component is not only dominant, it is also variable with upstream load. One way to get around that is to set up multiple transmit queues for different flows, perhaps based on TOS marking. This way, NTP packets, when suitably marked, can be made to bypass the transmit queue for best-effort traffic. Cheers, Jan _______________________________________________ questions mailing list [email protected] https://lists.ntp.org/mailman/listinfo/questions
