Take collisions divided by packets output.  You are looking for the percentage of
collisions related to the number of packets that were sent out of that interface.

Roman


At 05:57 AM 11/16/00 +0100, you wrote:

  

Hi ,
How can I find out the collision rate of .1% ( comparing the collisions with Output packets or bytes) 
Here's the output from my ethernet interface

 119069488 packets output, 3373784736 bytes, 0 underruns
     31 output errors, 41597688 collisions, 0 interface resets
     0 babbles, 0 late collision, 5543538 deferred    

Thanks

Amit
    -----Original Message----- From:  George Harper [SMTP:[EMAIL PROTECTED]] Sent:  Thursday, November 16, 2000 9:52 AM To:    E Joseph Cc:    [EMAIL PROTECTED] Subject:       Re: question : ethernet collision rule of thumb...

    The network would be considered unhealthy if it is experiencing more than .1% of packets colliding (do the math). As for your question regarding what does it take to shut a port down (errDisable) take a look at this URL: http://www.cisco.com/warp/public/473/20.html

      -g

    On Wed, 15 Nov 2000, E Joseph wrote:

    |Date: Wed, 15 Nov 2000 16:33:37 -0800 (PST) |From: E Joseph <[EMAIL PROTECTED]> |To: [EMAIL PROTECTED] |Subject: question : ethernet collision rule of thumb... | |I would first like to thank everyone.  I have been a member of this |groups for several years now.  I have never actually posted a question, |generally I just absorb others questions.  I realise there is no |concrete answer on this, BUT how many collision on a shared media |ethernet segment does it take before having a problem??  I was just |invovled in a situation where we had a hub hanging off a hub connected |to our 6509.  The switchport error disabled and I had to track the |devices down. I beleive you will always see some collisions in a shared |ethernet environment???  At what collision rate should you get |worried???  How much does it take to shut a switch port down??? | |         Thanks, |                      Ed

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