Date: Wed, 22 Sep 1999 02:08:16 GMT From: mike@sentex.net (Mike Tancsa) To: mkc@Graphics.Cornell.EDU Cc: questions@freebsd.org Subject: Re: how to set fxp0 to half-duplex? [was: nfs tuning] Message-ID: <37e83872.517261482@mail.sentex.net> In-Reply-To: <MAIL199909211821.AA231518065@broccoli.graphics.cornell.edu> References: <Pine.BSF.4.05.9909171349040.6392-100000@fw.wintelcom.net> <MAIL199909211821.AA231518065@broccoli.graphics.cornell.edu>
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>I changed the switch port to half-duplex and the frame and CRC errors
>and rpc timeouts all stopped immediately. Then I rebooted the FBSD
>machine in order to get it to pick up the half-duplex setting from
>the switch. I'm not sure if this last step was necessary. Does it
>take a reboot? Is there some way to switch duplex setting on the fly?
>ifconfig mediaopts seems like the obvious place, but fxp(4) only lists
>full-duplex as an option, no half-duplex.
ifconfig fxp0 media 10BaseT/UTP
ifconfig fxp0 media 10BaseT/UTP mediaopt full-duplex
No reboot is needed.
I use lots of fxp cards on a couple of Cat 1900s in 10BaseT Full duplex
mode without any errors. Similarly on the 100BaseT ports in full duplex
Here is a sample in 100BaseT full duplex.
-------------------------------------
Total good frames 632711776
Total octets >1834088214
Broadcast/multicast frames 4108617
Broadcast/multicast octets 498649470
Good frames forwarded 632711776
Frames filtered 0
Runt frames 0
No buffer discards 0
Errors:
FCS errors 0
Alignment errors 2
Giant frames 0
Address violations 0
-------------------------------------
Total frames 918936189
Total octets > 943528760
Broadcast/multicast frames 101871841
Broadcast/multicast octets>2589699969
Deferrals 0
Single collisions 0
Multiple collisions 0
Excessive collisions 0
Queue full discards 0
Errors:
Late collisions 0
Excessive deferrals 0
Jabber errors 0
Other transmit errors 0
I see the same sorts of results on my 10BaseT ports in full duplex.
---Mike
Mike Tancsa (mdtancsa@sentex.net)
Sentex Communications Corp,
Waterloo, Ontario, Canada
"Given enough time, 100 monkeys on 100 routers could setup a national IP network." (KDW2)
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