Re: Poor network performance: a lot of timeouts

From: Steven Hartland (killing_at_multiplay.co.uk)
Date: 05/30/05

  • Next message: Mark Kirkwood: "Re: Poor network performance: a lot of timeouts" 
    To: "Sebastian Ahndorf" <webmaster@it-is-warlock.de>, "Kris Kennaway" <kris@obsecurity.org>
Date: Mon, 30 May 2005 22:32:03 +0100

    ----- Original Message -----
    From: "Sebastian Ahndorf" <webmaster@it-is-warlock.de>

    > Kris Kennaway wrote:
    >>>Both sides must have same config, autosense should work if there is no
    >>>config possibility in other end.
    >>
    >> autosense may in fact not work, especially on low-quality NICs like rl.
    >>
    >
    > I don't agree to that.
    > I had similar problems with my network using a cheap switch with some
    > realtek nics. I had the nics running 100baseTX Full Duplex.
    > Changing this to autosense made the problems gone.
    >
    > Reason (as some people of the german questions-list told me):
    > Many cheap switches always send their autosensepakets, and have great
    > problems if the nics connected to the switch do not response to the
    > autosensepakets (cause they are configured to 10/100baseTX full/half
    > duplex).
    > Also realtek nics are far away from being good nics, they work without
    > problems with the autosensemode and a cheap switch for me (and many
    > other people I know).
    >
    > I would suggest the starter of this thread to use autosense with his nic
    > (if not tested yet).

    Quite a few 100tx nic / switch combinations misbehave when both
    sides are not set to the same be that 100fdx or auto sense. I've actually
    never seen a problem with 100tx autoneg as long as both ends had
    it selected and there wasn't a cable problem.

        Steve

    ================================================
    This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it.

    In the event of misdirection, illegible or incomplete transmission please telephone (023) 8024 3137
    or return the E.mail to postmaster@multiplay.co.uk.

    _______________________________________________
    freebsd-stable@freebsd.org mailing list
    http://lists.freebsd.org/mailman/listinfo/freebsd-stable
    To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org"

  • Next message: Mark Kirkwood: "Re: Poor network performance: a lot of timeouts"

    Relevant Pages

    • Re: Poor network performance: a lot of timeouts
      ... >>config possibility in other end. ... > autosense may in fact not work, especially on low-quality NICs like rl. ... I had similar problems with my network using a cheap switch with some ...
      (freebsd-stable)
    • Re: [SLE] Collisions with cable-modem.
      ... Even in Full Duplex mode. ... Collisions occur when two or more DIFFERENT nics try to talk ... merely a really cheap switch? ...
      (SuSE)
    • Re: [SLE] Collisions with cable-modem.
      ... Even in Full Duplex mode. ... Collisions occur when two or more DIFFERENT nics try to talk ... merely a really cheap switch? ... And yes it could make a performance difference. ...
      (SuSE)
    • Re: Domain Logon Speed
      ... >> usually only adjust nics away from autosense if I'm experiencing ... On the Dell switches (rebadged Cisco ... You don't need to lock down the speed always, ...
      (microsoft.public.windows.server.sbs)
    • Re: slowww file copy
      ... > Set to Autosense to speed up file copy ... >> a dell unmanaged gigabit switch. ... The internal nic on the SBS server is a ... Whichever clients have gigabit nics are set to 1gb full. ...
      (microsoft.public.windows.server.sbs)