You shouldn't have any (or very little) collisions on a switch, it is by
definition a point to point virtual circuit. Since there are only two
nodes, it is unlikely that they will transmit at the same time. I would use
Full Duplex if you can, then you CAN NOT have collisions by definition. Nor
should you see that many CRC's, runts, fragments, giants or other such crap.
If the switch is in cut-through mode then it will spew crc's, runts, and
everything out through all the interfaces that the traffic is destined for.
I agree that collisions are a part of standard Ethernet, but not for Full
Duplex Ethernet. The only time you will see collisions on full duplex links
is from certain OS's (Netware to mention one), and they use them illegally
for back off flow control, this is not part of the Ethernet Spec and is a
kluge.
Shawn
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of
Atif Awan
Sent: Wednesday, August 30, 2000 6:11 PM
To: John Neiberger; [EMAIL PROTECTED]
Subject: Re: Collisions on Ethernet Lan
20% is way too much man .. i think its 0.1 %
-----Original Message-----
From: John Neiberger <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
Date: Wednesday, August 30, 2000 7:36 PM
Subject: Re: Collisions on Ethernet Lan
>Are you having an excessive number of collisions? Why are you trying to
>reduce them? Collisions are there by design. Off the top of my head I
>forget what percentage of collisions is considered "Bad", but I believe it
>was 20%. Someone will correct me if I'm wrong on that. Unless you are
>seeing more than that or it's causing noticable performance problems, don't
>worry about it.
>
>> Hi,
>> HOw do I reduce the collisions on the ethernet
>> LAN.
>> I am using a cisco 2600 router with an ethernet
>> port
>> My switch is CATALYST 1900 series.
>>
>> Please help me.
>>
>> regards
>> Raj
>>
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