[c-nsp] Confirmation of Gigabit Ethernet autonegotiation behavior

[Thomas Sillaber]

There are some diffs between T and X 1G. T should not work without
autoneg(AN) (because PMA and PCS rely on AN). X should work without autoneg.
Maybe this links will help:

T:
https://www.iol.unh.edu/services/testing/ge/knowledgebase/1000BASE-T_PMA_Jul
y2004.pdf

X:
https://www.iol.unh.edu/services/testing/ge/knowledgebase/1000BASE-X_PCS_and
_PMA.pdf

General Info about AN in 1G:
https://www.iol.unh.edu/services/testing/ge/knowledgebase/Clause_37_Auto-Neg
otiation.pdf

//TS

-----Ursprüngliche Nachricht-----
Von: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] Im Auftrag von Peter Rathlev
Gesendet: Freitag, 25. Januar 2013 09:58
An: Alan Buxey
Cc: cisco-nsp at puck.nether.net
Betreff: Re: [c-nsp] Confirmation of Gigabit Ethernet autonegotiation
behavior

On Fri, 2013-01-25 at 08:34 +0000, Alan Buxey wrote:
> Probably better looking at the RFC ...however , duplex? Gigabit 
> requires full duplex. You can't have half duplex...

Actually you can. :-) IEEE 802.3 claus 37.2.1.3 describes half duplex for
1000BASE-X. It doesn't make a lot of operational sense, but it's possible.

--
Peter


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