Hi
I have an OEM installed XP Home edition and I am running into a
networking problem. My 10 MHz hub is showing an excessive number of
collisions, light almost constantly on, when the XP machine is accessing
the network. A change of network card, and cables, hasn’t altered the
situation. There are times when network access succeeds, the collision
light flashes less frequently on these occasions. The collision light
hardly ever flashes when my other slower machines are active.
The CPU is a 1.4GHz Athlon in a GigaByte GA-7DXR motherboard.
I wonder if anyone has seen similar behaviour and can suggest a rational
way forward.
TIA
Don Sharp
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Replace the 10MHz hub with a 10/100 switch perhaps for aroung $50?
----- Original Message -----
From: “Don Sharp”
To: “NT Developers Interest List”
Sent: Monday, October 29, 2001 5:49 AM
Subject: [ntdev] Excessive collision rate on XP
> Hi
> I have an OEM installed XP Home edition and I am running into a
> networking problem. My 10 MHz hub is showing an excessive number of
> collisions, light almost constantly on, when the XP machine is accessing
> the network. A change of network card, and cables, hasn’t altered the
> situation. There are times when network access succeeds, the collision
> light flashes less frequently on these occasions. The collision light
> hardly ever flashes when my other slower machines are active.
>
> The CPU is a 1.4GHz Athlon in a GigaByte GA-7DXR motherboard.
>
> I wonder if anyone has seen similar behaviour and can suggest a rational
> way forward.
>
> TIA
>
> Don Sharp
>
> —
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Dave Harvey wrote:
Replace the 10MHz hub with a 10/100 switch perhaps for aroung $50?
I’ll certainly consider that if it will cure the problem.
TVM
Don Sharp
----- Original Message -----
From: “Don Sharp”
> To: “NT Developers Interest List”
> Sent: Monday, October 29, 2001 5:49 AM
> Subject: [ntdev] Excessive collision rate on XP
>
> > Hi
> > I have an OEM installed XP Home edition and I am running into a
> > networking problem. My 10 MHz hub is showing an excessive number of
> > collisions, light almost constantly on, when the XP machine is accessing
> > the network. A change of network card, and cables, hasn’t altered the
> > situation. There are times when network access succeeds, the collision
> > light flashes less frequently on these occasions. The collision light
> > hardly ever flashes when my other slower machines are active.
> >
> > The CPU is a 1.4GHz Athlon in a GigaByte GA-7DXR motherboard.
> >
> > I wonder if anyone has seen similar behaviour and can suggest a rational
> > way forward.
> >
> > TIA
> >
> > Don Sharp
> >
> > —
> > You are currently subscribed to ntdev as: xxxxx@syssoftsol.com
> > To unsubscribe send a blank email to leave-ntdev-$subst(‘Recip.MemberIDChar’)@lists.osr.com
>
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What is probably true, since you swapped all the hardware, is that the XP machine
is capable of utilizing the full network bandwidth, so that collisions are more likely. 10MB Ethernet
has this horrible characteristic that the collision rate grows exponentially when you get over about 80 % utilization.
Assuming you have one hub and a few other machines, and the XP machine has a 10/100 card, using a switch instead will eliminate
the collisions on the XP segment, which will run at 100 in full duplex. The other segments will run at either 10 or 100 based on
the network card on those nodes.
Half-duplex segments will still have the potential for collisions, but this only if the switch and the network card try to
transmit simultaneously.
The biggest problem you will have here is that if the XP machine is sending to a 10mb node, the switch will queue up packets to
the slow link. If the switch’s queue is exceeded, then it will drop packets. Normally the TCP window size will be small enough
so that this won’t happen. With a switch, transfers between two 100mb nodes run at that speed, regardless of what else is
connected.
-DH
----- Original Message -----
From: “Don Sharp”
To: “NT Developers Interest List”
Sent: Monday, October 29, 2001 3:29 PM
Subject: [ntdev] Re: Excessive collision rate on XP
>
>
> Dave Harvey wrote:
> >
> > Replace the 10MHz hub with a 10/100 switch perhaps for aroung $50?
> >
>
> I’ll certainly consider that if it will cure the problem.
>
> TVM
>
> Don Sharp
>
> > ----- Original Message -----
> > From: “Don Sharp”
> > To: “NT Developers Interest List”
> > Sent: Monday, October 29, 2001 5:49 AM
> > Subject: [ntdev] Excessive collision rate on XP
> >
> > > Hi
> > > I have an OEM installed XP Home edition and I am running into a
> > > networking problem. My 10 MHz hub is showing an excessive number of
> > > collisions, light almost constantly on, when the XP machine is accessing
> > > the network. A change of network card, and cables, hasn’t altered the
> > > situation. There are times when network access succeeds, the collision
> > > light flashes less frequently on these occasions. The collision light
> > > hardly ever flashes when my other slower machines are active.
> > >
> > > The CPU is a 1.4GHz Athlon in a GigaByte GA-7DXR motherboard.
> > >
> > > I wonder if anyone has seen similar behaviour and can suggest a rational
> > > way forward.
> > >
> > > TIA
> > >
> > > Don Sharp
> > >
> > > —
> > > You are currently subscribed to ntdev as: xxxxx@syssoftsol.com
> > > To unsubscribe send a blank email to leave-ntdev-$subst(‘Recip.MemberIDChar’)@lists.osr.com
> >
> > —
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>
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Thanks Dave for a clear explanation.
Cheers
Don Sharp
Dave Harvey wrote:
What is probably true, since you swapped all the hardware, is that the XP machine
is capable of utilizing the full network bandwidth, so that collisions are more likely. 10MB Ethernet
has this horrible characteristic that the collision rate grows exponentially when you get over about 80 % utilization.
Assuming you have one hub and a few other machines, and the XP machine has a 10/100 card, using a switch instead will eliminate
the collisions on the XP segment, which will run at 100 in full duplex. The other segments will run at either 10 or 100 based on
the network card on those nodes.
Half-duplex segments will still have the potential for collisions, but this only if the switch and the network card try to
transmit simultaneously.
The biggest problem you will have here is that if the XP machine is sending to a 10mb node, the switch will queue up packets to
the slow link. If the switch’s queue is exceeded, then it will drop packets. Normally the TCP window size will be small enough
so that this won’t happen. With a switch, transfers between two 100mb nodes run at that speed, regardless of what else is
connected.
-DH
----- Original Message -----
From: “Don Sharp”
> To: “NT Developers Interest List”
> Sent: Monday, October 29, 2001 3:29 PM
> Subject: [ntdev] Re: Excessive collision rate on XP
>
> >
> >
> > Dave Harvey wrote:
> > >
> > > Replace the 10MHz hub with a 10/100 switch perhaps for aroung $50?
> > >
> >
> > I’ll certainly consider that if it will cure the problem.
> >
> > TVM
> >
> > Don Sharp
> >
> > > ----- Original Message -----
> > > From: “Don Sharp”
> > > To: “NT Developers Interest List”
> > > Sent: Monday, October 29, 2001 5:49 AM
> > > Subject: [ntdev] Excessive collision rate on XP
> > >
> > > > Hi
> > > > I have an OEM installed XP Home edition and I am running into a
> > > > networking problem. My 10 MHz hub is showing an excessive number of
> > > > collisions, light almost constantly on, when the XP machine is accessing
> > > > the network. A change of network card, and cables, hasn’t altered the
> > > > situation. There are times when network access succeeds, the collision
> > > > light flashes less frequently on these occasions. The collision light
> > > > hardly ever flashes when my other slower machines are active.
> > > >
> > > > The CPU is a 1.4GHz Athlon in a GigaByte GA-7DXR motherboard.
> > > >
> > > > I wonder if anyone has seen similar behaviour and can suggest a rational
> > > > way forward.
> > > >
> > > > TIA
> > > >
> > > > Don Sharp
> > > >
> > > > —
> > > > You are currently subscribed to ntdev as: xxxxx@syssoftsol.com
> > > > To unsubscribe send a blank email to leave-ntdev-$subst(‘Recip.MemberIDChar’)@lists.osr.com
> > >
> > > —
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> >
> > —
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>
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> collisions, light almost constantly on, when the XP machine is accessing
the network. A change of network card, and cables, hasn’t altered the
situation. There are times when network access succeeds, the collision
light flashes less frequently on these occasions. The collision light
hardly ever flashes when my other slower machines are active.
Try to change the OS on the same hardware.
If this will cure the problem - then the problem is in your card’s driver binary from XP. It sets the hardware in some idiotic mode.
Max
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“Maxim S. Shatskih” wrote:
> collisions, light almost constantly on, when the XP machine is accessing
> the network. A change of network card, and cables, hasn’t altered the
> situation. There are times when network access succeeds, the collision
> light flashes less frequently on these occasions. The collision light
> hardly ever flashes when my other slower machines are active.
Try to change the OS on the same hardware.
If this will cure the problem - then the problem is in your card’s driver binary from XP. It sets the hardware in some idiotic mode.
Max
Thanks Max. I have been thinking about that. Something like tomsrtbt
should let me explore that possibility.
TVM
Don Sharp
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Having followed up on the advice from this list it turned out to be a
purely mechanical problem. When the card back plate was screwed down the
poor fit placed it under strain and worked the card up in its socket.
The backplate fit has been “improved” but has to be held in place with
“blue tack” as any screwing with the back plate brings a return of the
problem. Suspect the case dimensioning is not sufficiently precise!
TVM for the suggestions Dave and Max.
Don Sharp
…snip…
> >
> > > ----- Original Message -----
> > > From: “Don Sharp”
> > > > To: “NT Developers Interest List”
> > > > Sent: Monday, October 29, 2001 5:49 AM
> > > > Subject: [ntdev] Excessive collision rate on XP
> > > >
> > > > > Hi
> > > > > I have an OEM installed XP Home edition and I am running into a
> > > > > networking problem. My 10 MHz hub is showing an excessive number of
> > > > > collisions, light almost constantly on, when the XP machine is accessing
> > > > > the network. A change of network card, and cables, hasn’t altered the
> > > > > situation. There are times when network access succeeds, the collision
> > > > > light flashes less frequently on these occasions. The collision light
> > > > > hardly ever flashes when my other slower machines are active.
> > > > >
> > > > > The CPU is a 1.4GHz Athlon in a GigaByte GA-7DXR motherboard.
> > > > >
> > > > > I wonder if anyone has seen similar behaviour and can suggest a rational
> > > > > way forward.
> > > > >
> > > > > TIA
> > > > >
> > > > > Don Sharp
> > > > >
> > > > > —
> > > > > You are currently subscribed to ntdev as: xxxxx@syssoftsol.com
> > > > > To unsubscribe send a blank email to leave-ntdev-$subst(‘Recip.MemberIDChar’)@lists.osr.com
> > > >
> > > > —
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> > >
> > > —
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> >
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