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RE: ADSL problems with 10/100 NICs
- To: fredy <fredarie5(at-nospam)isdn.net.il>
- Subject: RE: ADSL problems with 10/100 NICs
- From: Yaron Zabary <yaron(at-nospam)aristo.tau.ac.il>
- Date: Sun, 10 Jun 2001 17:19:16 +0300 (IDT)
- Cc: Aviram Jenik <aviram(at-nospam)jenik.com>, Shaul Karl <shaulka(at-nospam)bezeqint.net>, linux ILUG <linux-il(at-nospam)linux.org.il>
- Delivered-To: linux.org.il-linux-il@linux.org.il
- In-Reply-To: <OEEMLMEOFJOBOOMHOMBGOEOACCAA.fredarie5@isdn.net.il>
- Sender: linux-il-bounce(at-nospam)cs.huji.ac.il
On Thu, 7 Jun 2001, fredy wrote:
> Unlike a 10/100 hub a switch will not automatically handle differences in
> communication speeds.
This is not correct. A switch can run with stations at both speeds. As a
matter of fact, a 10/100 hub is using a dual port switch (aka bridge) to
seperate the 100Mb hub from the 10Mb hub.
> I never used 3com switches but they all have one thing in common - the
> direct cable connection, some even a telnet connection.
There are unmanaged switches. These cannot be configured at all.
> All you have to do is enterthe interface and configure the switch, I belive
> that bye seperating the switch into "semi-subnets" you will solve the
> problem.
> for example, lets say its a 16 port switch, just make the first 8 10MBit and
> the last 8 100MBit, the switch then will use logic to transfer packets
> between the two "subnets".
I am not sure I understand what you are trying to describe here.
> another thing you should do while inside the interface is check the port
> status, i belive you should see many collisions and packet timeouts which
> were caused by the missconfiguration of the switch and they are the reason
> your sessions broke up.
>
> -----Original Message-----
> From: linux-il-bounce@cs.huji.ac.il [mailto:linux-il-bounce@cs.huji.ac.il]On
> Behalf Of Aviram Jenik
> Sent: Thursday, June 07, 2001 8:48 AM
> To: Shaul Karl
> Cc: linux ILUG
> Subject: Re: ADSL problems with 10/100 NICs
>
>
>
> > > My guess is that those machines are sending packets in 100mbps whereas
> the
> > > Linux machine uses a 10mbps card and loses packets, which results in a
> > > broken connection.
> >
> > I was under the impression that a good dual-speed switch should handle
> those speed differences by itself, transparently. What is the model of your
> switch?
> >
>
> Yes, I thought so too. Note that network communication is working, but
> occasionally web pages are not displayedand e-mail download gets broken.
>
> The switch is a 3COM OfficeConnect Dual speed switch.
>
> - Aviram
>
>
>
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-- Yaron.
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