"David J Taylor" <david-tay...@blueyonder.not-this-part.nor-this.co.uk.invalid> writes:
>"Unruh" <unruh-s...@physics.ubc.ca> wrote in message >news:qsbam.47742$db2.29...@edtnps83... >[] >> Actually those Gb ethernet switches seems to have some really bad and >> variable >> latencies. My system, before they installed Gb switches, had a >> consistant >> roundtrip of 140 usec and gave better than 20usec jitter (with 100Mb >> switches). Since those new switches >> were installed things have gone to hell-- variable roundtrips ( 140usec, >> 300usec >> and up to 1 sec roundtrip) and much much worse jitter. NOt sure where >> the problem >> is, but it sure is terrible. >> Doing a plot of roundtrip vs offset it is definitely one way delay. >Most interesting, Bill. Mine is a relatively cheap and cheerful device >from Netgear (GS608): > http://www.netgear.co.uk/ethernet_network_switch_gs605.php >so whether being very simple and unmanaged is likely to mean that it's >performance is better or worse I leave to speculation or measurement! Ours are top of the line 32 port Cisco switches (University) _______________________________________________ questions mailing list questions@lists.ntp.org https://lists.ntp.org/mailman/listinfo/questions
