Maximum Auto-Negotiation Time on Twisted-Pair Gigabit Ethernet
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Posted by on June 19, 2008, 8:21 am
Please log in for more thread options I need to know how much time the Auto-Negotiation process can take in 1000Base-T networks. I have already looked into the IEEE 802.3 standard, but there is no maximum period specified directly. Maybe I have missed somehting... I also have to admit that I didn't READ the whole thing ;-) In the 802.3u document, there is this "Link Test Fail state exit condition" of "autoneg_wait_timer expired and either RD = active or consecutive link test pulses = 3 min., 10 max". Since the link test pulses have a much shorter interval, this would mean that 1000 ms is the maximum. But there are also other timers which sound like they may be somehow related to the maximum auto-negotiation time: - autoneg_wait_timer 500 ms to 1000 ms - break_link_timer 1200 ms to 1500 ms - link_max_timer_done Any help would be appreciated! | |||||||||||||
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Posted by Rick Jones on June 25, 2008, 4:42 pm
Please log in for more thread options it. I'm almost equally certain there are devices out there which do not adhere to the standard :( So, the question becomes one of the motivation behind the question. Are you trying to build something which meets the spec(s) or are you trying to see if something you are using is out of spec etc etc rick jones -- firebug n, the idiot who tosses a lit cigarette out his car window these opinions are mine, all mine; HP might not want them anyway... :) feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH... | |||||||||||||
